🌐 Mailman 3 December 2006 - Python-list - python.org

xml bug?
by Imbaud Pierre Jan. 8, 2007

Jan. 8, 2007

I am using the standard xml library to create another library able to read, and maybe write, xmp files. Then an xml library bug popped out: xml.dom.minidom was unable to parse an xml file that came from an example provided by an official organism.(http://www.iptc.org/IPTC4XMP) The parsed file was somewhat hairy, but I have been able to reproduce the bug with a simplified version, that goes: <?xpacket begin='' id='W5M0MpCehiHzreSzNTczkc9d'?> <x:xmpmeta xmlns:x='adobe:ns:meta/' x:xmptk='XMP toolkit 3.0-28, framework 1.6'> <rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#' xmlns:iX='http://ns.adobe.com/iX/1.0/'> <rdf:Description rdf:about='uuid:f5b64178-9394-11d9-bb8e-a67e6693b6e9' xmlns:xmpPLUS='XMP Photographic Licensing Universal System (xmpPLUS, http://ns.adobe.com/xap/1.0/PLUS/)'> <xmpPLUS:CreditLineReq>False</xmpPLUS:CreditLineReq> <xmpPLUS:ReuseAllowed>False</xmpPLUS:ReuseAllowed> </rdf:Description> </rdf:RDF> </x:xmpmeta> <?xpacket end='w'?> The offending part is the one that goes: xmpPLUS='....' it triggers an exception: ValueError: too many values to unpack, in _parse_ns_name. Some debugging showed an obvious mistake in the scanning of the name argument, that goes beyond the closing " ' ". Im aware I dont give here enough matter to allow full understanding of the bug. But thats not the place for this, and thats not my point. Now my points are: - how do I spot the version of a given library? There is a __version__ attribute of the module, is that it? - How do I access to a given library buglist? Maybe this one is known, about to be fixed, it would then be useless to report it. - How do I report bugs, on a standard lib? - I tried to copy the lib somewhere, put it BEFORE the official lib in "the path" (that is:sys.path), the stack shown by the traceback still shows the original files being used. Is there a special mechanism bypassing the sys.path search, for standard libs? (I may be wrong on this, it seems hard to believe...) - does someone know a good tool to validate an xml file? btw, my code: from nxml.dom import minidom ... class whatever: def __init__(self, inStream): xmldoc = minidom.parse(inStream) Thanks for any help...

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Anyone persuaded by "merits of Lisp vs Python"?
by Paddy3118 Jan. 6, 2007

Jan. 6, 2007

This month there was/is a 1000+ long thread called: "merits of Lisp vs Python" In comp.lang.lisp. If you followed even parts of the thread, AND previously used only one of the languages AND (and this is the crucial bit), were persuaded to have a more positive view of the other language; (deep breath, this is a long, as well as grammatically incorrect sentence), THEN WHY NOT POST ON WHAT ARGUMENTS PERSUADED YOU. OTHERWISE LET THIS POST WITHER AND DIE ALONE. (I suspect this thread to be very short - even the original poster seems to have given up on the day he started the thread). - Paddy.

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Re: MySQLdb windows binaries for Python 2.5?? Yes, but from a World of Warcraft guild.
by John Nagle Jan. 5, 2007

Jan. 5, 2007

Jan Dries wrote: > Henk.van.Asselt(a)gmail.com wrote: > >> I'm also looking for a MySQLdb binary for windows. This is holding me >> from upgrading from Python 2.4 to Python 2.5 ! >> > > If you search the Help Forum of the MySQLdb project on SourceForge, you > will find a couple of people who have successfully built MySQLdb on > Windows for 2.5, and are willing to share their installers. > That's how I got my binaries. > > Regards, > Jan Yes, see http://sourceforge.net/forum/forum.php?thread_id=1571110&forum_id=70461 for an untested version created by a World of Warcraft guild: http://www.guildmanus.com/uploaded/MySQL-python.exe-1.2.2b2.win32-py2.5.exe This, apparently, is the extent of current Python support for MySQL. Want to install that executable, as root, on your production machines? This is embarassing for the Python community. Perl and PHP come with MySQL support built in. Python is out to lunch on this. John Nagle Animats

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pythoncom module
by Scripter47 Jan. 3, 2007

Jan. 3, 2007

Hey, I need a module called "pythoncom" anyone that knows where a can find that module??? thanks!

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Why does Python never add itself to the Windows path?
by Ben Sizer Jan. 3, 2007

Jan. 3, 2007

I've installed several different versions of Python across several different versions of MS Windows, and not a single time was the Python directory or the Scripts subdirectory added to the PATH environment variable. Every time, I've had to go through and add this by hand, to have something resembling a usable Python installation. No such problems on Linux, whether it be Mandrake/Mandriva, Fedora Core, or Kubuntu. So why is the Windows install half-crippled by default? I just rediscovered this today when trying to run one of the Turbogears scripts, but this has puzzled me for years now. -- Ben Sizer

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Re: Can I beat perl at grep-like processing speed?
by Nick Craig-Wood Jan. 3, 2007

Jan. 3, 2007

js <ebgssth(a)gmail.com> wrote: > Just my curiosity. > Can python beats perl at speed of grep-like processing? > > $ wget http://www.gutenberg.org/files/7999/7999-h.zip > $ unzip 7999-h.zip > $ cd 7999-h > $ cat *.htm > bigfile > $ du -h bigfile > du -h bigfile > 8.2M bigfile > > #!/usr/local/bin/perl > open(F, 'bigfile') or die; > > while(<F>) { > s/[\n\r]+$//; > print "$_\n" if m/destroy/oi; > } > #!/usr/bin/env python > import re > r = re.compile(r'destroy', re.IGNORECASE) > > for s in file('bigfile'): > if r.search(s): print s.rstrip("\r\n") > > $ time perl grep.pl > pl.out; time python grep.py > py.out > real 0m0.168s > user 0m0.149s > sys 0m0.015s > > real 0m0.450s > user 0m0.374s > sys 0m0.068s > # I used python2.5 and perl 5.8.6 Playing for the other side temporarily, this is nearly twice as fast... $ time perl -lne 'print if m/destroy/oi' bigfile >pl.out real 0m0.133s user 0m0.120s sys 0m0.012s vs $ time ./z.pl >pl.out.orig real 0m0.223s user 0m0.208s sys 0m0.016s Which gives the same output modulo a few \r -- Nick Craig-Wood <nick(a)craig-wood.com> -- http://www.craig-wood.com/nick

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Re: a question on python dict
by Lawrence D'Oliveiro Jan. 3, 2007

Jan. 3, 2007

In message <mailman.1896.1166685873.32031.python-list(a)python.org>, Tim Peters wrote: > You should also note that copying a dict key or value (no matter of > what type) consists in its entirety of copying one machine address (a > 4- or 8-byte pointer, depending on platform). Actually, no. It also consists of updating reference counts as well.

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A question about unicode() function
by JTree Jan. 3, 2007

Jan. 3, 2007

Hi,all I encountered a problem when using unicode() function to fetch a webpage, I don't know why this happenned. My codes and error messages are: Code: #!/usr/bin/python #Filename: test.py #Modified: 2006-12-31 import cPickle as p import urllib import htmllib import re import sys def funUrlFetch(url): lambda url:urllib.urlopen(url).read() objUrl = raw_input('Enter the Url:') content = funUrlFetch(objUrl) content = unicode(content,"gbk") print content content.close() error message: C:\WINDOWS\system32\cmd.exe /c python test.py Enter the Url:http://www.msn.com Traceback (most recent call last): File "test.py", line 16, in ? content = unicode(content,"gbk") TypeError: coercing to Unicode: need string or buffer, NoneType found shell returned 1 Hit any key to close this window... Any suggestions would be appreciated! Thanks!

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Some basic newbie questions...
by jonathan.beckett Jan. 2, 2007

Jan. 2, 2007

Hi all, While working on support at work, I have been picking away at Python - because I think it could be a valuable scripting tool for building utilities from. I have been reading the python.org tutorials, and playing around with some basic code, but I have ended up with a few questions that probably have straightforward answers - any quick explanations or assistance would be fantastic... Question 1... Given the code below, why does the count method return what it does? How *should* you call the count method? a = [] a.append(1) print a.count Question 2... What is the correct way of looping through a list object in a class via a method of it? (I've hit all sorts of errors picking away at this, and none of the tutorials I've found so far cover it very well) - apologies for the arbitrary class - it's the first example I thought up... class Gun: Shells = 10 class Battleship: Gun1 = Gun() Gun2 = Gun() Guns = [Gun1,Gun2] def getShellsLeft(self): NumShells = 0 for aGun in Guns: NumShells = NumShells + aGun.Shells return NumShells Bizmark = Battleship() print Bizmark.getShellsLeft() In the above code, I guess I'm just asking for the *correct* way to do these simple kinds of things...

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Re: DOS, UNIX and tabs
by Marc 'BlackJack' Rintsch Jan. 2, 2007

Jan. 2, 2007

In <mailman.2163.1167518010.32031.python-list(a)python.org>, Paul McNett wrote: >> Did you try to open your code files with another editor, which has a >> different length for tabulator chars? It would look quite ugly, I >> guess... > > Actually, no. Everyone can choose their own number of spaces-per-tab and > it'll look right, as long as everyone uses a monospace font. You never tried that with tabs plus additional spaces to line up e.g. arguments that are broken across lines, right? And there are a number of environments where you can't change the length of a tab like email or terminals where code will be displayed from time to time for example as diffs from a version control system. Ciao, Marc 'BlackJack' Rintsch

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