itools 0.20.0 released
itools is a Python library, it groups a number of packages into a single meta-package for easier development and deployment: itools.catalog itools.i18n itools.uri itools.csv itools.ical itools.vfs itools.datatypesitools.odf itools.web itools.gettext itools.pdf itools.workflow itools.git itools.rest itools.xliff itools.handlers itools.rss itools.xml itools.html itools.stl itools.http itools.tmx The most visible change in this major release is that itools.cms has been moved out of itools and is now distributed as a separate package, named ikaaro. Also in the code reorganization category: itools.xhtml has been merged into itools.html. And the itools.schemas package has been removed, since we do the same thing in a different way. The most important change is the architecture overhaul of the handlers package. From a functional point of view, the big news is the database layer that has been included, which provides atomic transactions for the file system. But the changes go well beyond that, read the documentation to learn how things work now. Other packages that have seen more or less important API improvements or changes include itools.catalog, itools.csv, itools.datatypes, itools.rss, itools.vfs and itools.web. There have been also many naming normalizations. Check the upgrade notes for further details. The numbering scheme has changed, we have jumped from the 0.16 to the 0.20 version, and future major releases will be numbered 0.30, 0.40, 0.50, etc. (This change is to define an implicit relationship with the numbering scheme of ikaaro.) Resources - Download http://download.ikaaro.org/itools/itools-0.20.0.tar.gz http://download.ikaaro.org/itools/itools-0.20.0.win32-py2.5.exe http://download.ikaaro.org/itools/itools-0.20.0.win32-py2.4.exe Home http://www.ikaaro.org/itools Mailing list http://mail.ikaaro.org/mailman/listinfo/itools Bug Tracker http://bugs.ikaaro.org/ -- J. David Ibáñez Itaapy http://www.itaapy.com Tel +33 (0)1 42 23 67 45 9 rue Darwin, 75018 Paris Fax +33 (0)1 53 28 27 88 -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Re: New+old-style multiple inheritance
Jonathan Gardner a écrit : On Dec 18, 7:08 am, [EMAIL PROTECTED] (snip) Monkey patching is definitely unpythonic. You must be a Ruby guy. Strange enough, I learned monkey-patching with Python, years before I first heard of a language named Ruby. Why don't you try doing something else to get the behavior you want, something more explicit? From experience, monkey-patching is sometimes the very best solution. -- http://mail.python.org/mailman/listinfo/python-list
Re: Problem untaring python2.5
You might want to try an all-python implementation for sanity testing.
I haven't tested this snippet much. I am not sure it handles nested
files all that well.
import tarfile
tar = tarfile.open(TarTest.tar.gz2, r:gz) # other options:
r:bz2, and ??
file_list = tar.getnames()
import os
os.mkdir('new_dir')
# write the files out to new files
for fname in tar.getnames():
# extract/decompress the data of each file
data = tar.extractfile(fname).read()
# optionally change the filename
new_file = new_dir/ + fname
print File %s written! % new_file
# write the decompressed data to a file
fout = open(new_file, w)
fout.write(data)
fout.close()
# done, close the tar file ...
tar.close()
On Dec 19, 12:16 pm, [EMAIL PROTECTED] wrote:
Hello,
It is not possible to give sharp hints without more relevant
information like:
- What is your platform?
- Which version of python?
- What is the version of: $tar--version (GNUtar, other proprietarytar,
according to my personal experience, AIXtarmay fail)
- Is your disk full or do you have the correct permissions with your
current user?
++
Sam
Hi Sam ,
I am using windows server 2003, python2.5.1 and version 1.16 of tar
and as per disk full issues i dont think that my systems hard disk is
full
--
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Leading the Campaign for Economic and Financial Literacy
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Re: Where best to put local modules?
Gabriel Genellina [EMAIL PROTECTED] wrote: En Wed, 19 Dec 2007 14:02:20 -0300, [EMAIL PROTECTED] escribi?: I'm just beginning to create some python modules for my own use and I'm wondering where to put them. Initially I have put them in $HOME/bin and I have set PYTHONPATH to point to them there. It all seems to be OK but I was wondering if I might be storing up problems for the future by putting python modules in with my odds and sods of shell scripts etc. (and with my python 'main' scripts). Would I be better off putting the modules somewhere else, e.g. somewhere like $HOME/lib/python? Try lib/pythonX.X/site-packages, which is already on sys.path so you don't have to set PYTHONPATH That's fine if it happens to be your own system and you have root access, however I was actually meaning on a system where I just have a shell account. -- Chris Green -- http://mail.python.org/mailman/listinfo/python-list
Re: New+old-style multiple inheritance
Bruno Desthuilliers wrote: Jonathan Gardner a écrit : On Dec 18, 7:08 am, [EMAIL PROTECTED] (snip) Monkey patching is definitely unpythonic. You must be a Ruby guy. Strange enough, I learned monkey-patching with Python, years before I first heard of a language named Ruby. Indeed. I believe the term started at Zope Corp. Ah, Wikipedia supports my recollection: http://en.wikipedia.org/wiki/Monkey_patch (And I swear that it did so before I checked it.) It looks like some Ruby folks have taken to calling the practice duck punching, which has a certain charm of its own. -- Robert Kern I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth. -- Umberto Eco -- http://mail.python.org/mailman/listinfo/python-list
Re: Static linking of python and pyqt
On Dec 19, 1:26 pm, Markus Dahlbokum [EMAIL PROTECTED] wrote: I just want the qt libs linked to the interpreter without accessing them by a module. I tried the configure option '--with-libs='lib ...''. The make did fine but the executable is too small and the qt symbols are not known by it. How can I just link qt statically? Why do you want to do this? If qt isn't actually *used* in Python (as you don't include the pyqt modules), what effect do you expect from such linking? I think it linked just fine - it just didn't include any symbols, because none were needed. That is the correct, expected behavior. It all worked fine. Regards, Martin I need an environment that can be delivered to our customers without installing python, qt and pyqt. We want to provide the complete package. In order to do so I need to link at least python and qt. How can this be done? Of course a complete package with python, qt and pyqt would be the best solution but there seem to be even more complications that way. If you can help me with this I would be very grateful. If it's for windows, py2exe works like a charm for this kind of setup. For windows + linux, you might one to try one of: http://www.freehackers.org/Packaging_a_python_program -- http://mail.python.org/mailman/listinfo/python-list
Re: pop3_ssl Attachment problem
On Dec 20, 9:22 am, los117 [EMAIL PROTECTED] wrote: I am trying to fetch email from gmail, but what I am really interested is the attachment. I manage to access the gmail server and get the messege but the attachment came as text: --=_Part_5286_15861975.1197955173158 Content-Type: audio/mpeg; name=Dire Straits - 12 - Calling Elvis.mp3 Content-Transfer-Encoding: base64 X-Attachment-Id: f_fabzd5l20 Content-Disposition: attachment; filename=Dire Straits - 12 - Calling Elvis.mp3 // ugbAAP8AAA... how do i manage to get the file? I google for a while now, but I am a bit lost of ideas. Sorry for the noobish and the english. thanks =D the base64 string you started quoting is the attachment. from base64 import decodestring fout = open( filename_from_email, 'w' ).write( decodestring( string_you_parsed_from_the_email ) ) also look at the email module, there are some functions to get the payload of the email for you. -- http://mail.python.org/mailman/listinfo/python-list
Re: Where best to put local modules?
Bruno Desthuilliers [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] a écrit : I'm just beginning to create some python modules for my own use and I'm wondering where to put them. Initially I have put them in $HOME/bin and I have set PYTHONPATH to point to them there. It all seems to be OK but I was wondering if I might be storing up problems for the future by putting python modules in with my odds and sods of shell scripts etc. (and with my python 'main' scripts). Would I be better off putting the modules somewhere else, e.g. somewhere like $HOME/lib/python? If you're on a shared system and don't have admin access, this last solution is probably the best - pure modules have nothing to do in a bin/ directory indeed. Now if it's your own computer, why not just put them in /path/to/python/libs/site-packages ? There's one of each, a system where I have a shell account but not root access and my home system. There is a disadvantage of putting stuff in the site-packages directory isn't there? If/when I upgrade the system the python modules I have added will effectively not be visible to the upgraded system. I know I can copy them across to the new site-packages but it's just one more chore when upgrading. If they were in $HOME/lib/python this issue wouldn't arise because /home stays the same across upgrades. -- Chris Green -- http://mail.python.org/mailman/listinfo/python-list
Question about email-handling modules
Hello,
I'm new to Python but have lots of programming experience in C, C++ and
Perl. Browsing through the docs, the email handling modules caught my eye
because I'd always wanted to write a script to handle my huge, ancient, and
partially corrupted email archives.
Of course I know that this kind of project shouldn't be tackled by a
beginner in a language, but I still thought I'd give it a spin.
So I wrote the stuff at the bottom. It lists senders, subjects and
addressees of all messages in an mbox.
Things that I don't understand:
1. Why can I get the 'subject' and 'from' header field unsig the []
notation, but not 'to'? When I print Message.keys I get a list of all header
fields of the message, including 'to'. What's the difference between
message['to'] and message.get('to')?
2. Why can't I call the get_payload() method on the message? What I get is
this cryptic error: AttributeError: Message instance has no attribute
'get_payload'. I'm trying to call a method here, not an attribute. It makes
no difference if I put parentheses after get_payload or not. I looked into
the email/Message module and found get_payload defined there.
I don't want to waste your time by requesting that you pick apart my silly
example. But maybe you can give me a pointer in the right direction. This is
python 2.4 on a Debian box.
---
#!/usr/bin/python
import mailbox
import email # doesn't make a difference
from email import Message # neither does this
mbox = file(mail.old/friends)
for message in mailbox.UnixMailbox(mbox):
subject = message['subject']
frm = message['from']
#to = message['to'] # this throws a Key Error
to = message.get('to'); # ...but this works
print frm, writes about, subject, to, to
#print message.get_payload() # this doesn't work
--
robert
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Re: Question about email-handling modules
Robert Latest wrote:
Hello,
I'm new to Python but have lots of programming experience in C, C++ and
Perl. Browsing through the docs, the email handling modules caught my eye
because I'd always wanted to write a script to handle my huge, ancient, and
partially corrupted email archives.
Of course I know that this kind of project shouldn't be tackled by a
beginner in a language, but I still thought I'd give it a spin.
So I wrote the stuff at the bottom. It lists senders, subjects and
addressees of all messages in an mbox.
Things that I don't understand:
1. Why can I get the 'subject' and 'from' header field unsig the []
notation, but not 'to'? When I print Message.keys I get a list of all header
fields of the message, including 'to'. What's the difference between
message['to'] and message.get('to')?
On dicts, and presumably on Messages too, .get returns a default value
(None, or you can specify another with .get(key, default) if the key
doesn't exist.
I can't say why ['to'] doesn't work when it's in the list of keys, though.
2. Why can't I call the get_payload() method on the message? What I get is
this cryptic error: AttributeError: Message instance has no attribute
'get_payload'. I'm trying to call a method here, not an attribute. It makes
no difference if I put parentheses after get_payload or not. I looked into
the email/Message module and found get_payload defined there.
Methods are attributes. When you do obj.method(), obj.method and
() are really two separate things: It gets the method attribute of
obj, and then calls it.
I don't want to waste your time by requesting that you pick apart my silly
example. But maybe you can give me a pointer in the right direction. This is
python 2.4 on a Debian box.
---
#!/usr/bin/python
import mailbox
import email # doesn't make a difference
from email import Message # neither does this
mbox = file(mail.old/friends)
for message in mailbox.UnixMailbox(mbox):
subject = message['subject']
frm = message['from']
#to = message['to'] # this throws a Key Error
to = message.get('to'); # ...but this works
print frm, writes about, subject, to, to
#print message.get_payload() # this doesn't work
--
robert
(Oops, I wrote this like half an hour ago, but I never sent it.)
--
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Re: More than one interpreter per process?
On 19 Des, 08:02, Christian Heimes [EMAIL PROTECTED] wrote: No, you can't. Sub-interpreters share a single GIL and other state. Why don't you run multiple processes? It's on of the oldest and best working ways use the full potential of your system. Lot's of Unix servers like postfix, qmail, apache (with some workers) et al. use processes. Because there is a broken prominent OS that doesn't support fork()? MPI works with multiple processes, though, and can be used from Python (mpi4py) even under Windows. -- http://mail.python.org/mailman/listinfo/python-list
Is there *any* real documentation to PyWin32?
I understand that the Win32 has been said to be itself poorly documented, so perhaps that the documentation that comes with the modules is of similar quality is no coincidence. Maybe I'm still too young in my programming to grasp the good of that documentation, but for myself, it tells me next to nothing. Could anyone point me to anything which may exist that does a better job of explaining the extensions' use? I tried to take a look @ Microsoft's documentation, but it was confusing. -- http://mail.python.org/mailman/listinfo/python-list
Re: Problem untaring python2.5
On Dec 20, 5:25 pm, abhishek [EMAIL PROTECTED] wrote: On Dec 19, 12:16 pm, [EMAIL PROTECTED] wrote: Hello, It is not possible to give sharp hints without more relevant information like: - What is your platform? - Which version of python? - What is the version of: $tar--version (GNUtar, other proprietarytar, according to my personal experience, AIXtarmay fail) - Is your disk full or do you have the correct permissions with your current user? ++ Sam Hi Sam , I am using windows server 2003, python2.5.1 and version 1.16 of tar and as per disk full issues i dont think that my systems hard disk is full You didn't answer the question about permissions. You may need to log on as an admin. If those /Mac/. files are the only ones that untar complained about and it unpacked all the other files, then AFAIK you don't have a problem -- that stuff is Macintosh-specific. Otherwise I suggest you try another means of unpacking the archive. I have downloaded the tgz file and unpacked it successfully with 7zip (http://www.7-zip.org/) -- it should hack the tar.bz2 file also. HTH, John -- http://mail.python.org/mailman/listinfo/python-list
Re: Is there *any* real documentation to PyWin32?
Benoit wrote: I understand that the Win32 has been said to be itself poorly documented, so perhaps that the documentation that comes with the modules is of similar quality is no coincidence. Maybe I'm still too young in my programming to grasp the good of that documentation, but for myself, it tells me next to nothing. Could anyone point me to anything which may exist that does a better job of explaining the extensions' use? I tried to take a look @ Microsoft's documentation, but it was confusing. I think the thing is that, for most of the modules, they're simply answering the question How do I do x in Python? where x is the answer to the question How do I do y in Windows?. For example: How do I send something to a printer in Windows?. If you Google around a bit with that, you'll end up with things like OpenPrinter, StartDocPrinter and so on. With a Vb/Delphi/C++ example in hand, the pywin32 extensions usually make it possible to translate pretty much directly into Python. Obviously, the modules are more-or-less hand-coded/generated so only whatever someone's[*] seen fit to include are included (and development continues so new things do turn up). The more general solution is ctypes, standard with Py2.5+, available as an extension before that. That's even lower level, but does mean that if something isn't exposed via pywin32 then you can do-it-yourself. All this isn't really answering your question but is at least explaining a bit why explaining the extensions' use is perhaps a trivial task - they're there to expose the Microsoft API in a slightly more Pythonic layer. There are a few web pages around with a few hints and recipes, my own included: http://timgolden.me.uk/python/win32_how_do_i.html Ultimately, though, you're at the mercy of the MS API unless someone's already done the legwork of providing a more Pythonic wrapper to something. TJG [*] And someone here means the selfless small team, mostly consisting of Mark Hammond and Roger Upole, who've contributed over the years. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to detect if a image file has icc profile embeded?
On Dec 15, 7:19 pm, has [EMAIL PROTECTED] wrote: On 15 Dec, 02:40, hi and hello [EMAIL PROTECTED] wrote: thx. What OS? windows xp and linux -- http://mail.python.org/mailman/listinfo/python-list
Valgrind and pexpect
Hi,
I'm using the pexpect module to spawn some processes in a testing
environment. pexpect uses, internally, os.execv. What I need to do is
valgrind python and get memory leaks from the spawned children
(assuming that python doesn't leak :)).
Here's a simple testcase:
===
leak.c:
===
#include stdlib.h
#include stdio.h
int main()
{
int *i = (int *) malloc(sizeof(int));
*i = 7;
printf(*i=%d\n, *i);
return 0;
}
===
leak.py:
===
import pexpect
import sys
child = pexpect.spawn('./leak')
child.expect('\*i=');
print 'Done'
===
Valgrind command:
===
valgrind --leak-check=full --trace-children=yes --tool=memcheck
--suppressions=valgrind-python.supp python ./leak.py
==30239== Memcheck, a memory error detector.
==30239== Copyright (C) 2002-2006, and GNU GPL'd, by Julian Seward et al.
==30239== Using LibVEX rev 1658, a library for dynamic binary translation.
==30239== Copyright (C) 2004-2006, and GNU GPL'd, by OpenWorks LLP.
==30239== Using valgrind-3.2.1-Debian, a dynamic binary
instrumentation framework.
==30239== Copyright (C) 2000-2006, and GNU GPL'd, by Julian Seward et al.
==30239== For more details, rerun with: -v
==30239==
Done
==30239==
==30239== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 1092 from 8)
==30239== malloc/free: in use at exit: 702,546 bytes in 140 blocks.
==30239== malloc/free: 2,314 allocs, 2,174 frees, 1,929,320 bytes allocated.
==30239== For counts of detected errors, rerun with: -v
==30239== searching for pointers to 140 not-freed blocks.
==30239== checked 1,069,436 bytes.
==30239==
==30239== LEAK SUMMARY:
==30239==definitely lost: 0 bytes in 0 blocks.
==30239== possibly lost: 0 bytes in 0 blocks.
==30239==still reachable: 699,710 bytes in 138 blocks.
==30239== suppressed: 2,836 bytes in 2 blocks.
==30239== Reachable blocks (those to which a pointer was found) are not shown.
==30239== To see them, rerun with: --show-reachable=yes
As you can see, the 4 bytes leaked by leak.c are not reported. The
suppression file I've used is taken from:
http://svn.python.org/projects/python/trunk/Misc/valgrind-python.supp
and I have uncommented the parts related to PyObject_Free and
PyObject_Realloc, as explained there.
So, does anyone know what the correct way to do this is?
Thanks in advance,
Salvarore.
--
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http://www.iovene.com/
Key Fingerprint: 5647 944D D5AD 2E87 00B4 7D54 2864 359D FF20 16D8
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Hexadecimal list conversion
Hi All. I have a list which is a line from a file: ['\x003\x008\x001\x004\x007\x005\x00.\x005\x000\x002\x005\x009\x009\x00', '\x002\x001\x003\x006\x002\x002\x00.\x001\x007\x004\x002\x008\x002\x00'] This should be in the format: ['381475.502599', '213622.174282'] I've tried a few options using replace (replacing \x00 with ) and trying to convert from hexademical to decimal. But nothing has worked. Can anybody give any tips to help? Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to detect if a image file has icc profile embeded?
On 20 Dec, 12:09, hi and hello [EMAIL PROTECTED] wrote: On Dec 15, 7:19 pm, has [EMAIL PROTECTED] wrote: On 15 Dec, 02:40, hi and hello [EMAIL PROTECTED] wrote: thx. What OS? windows xp and linux Not my areas of expertise, unfortunately. This might be looking into though: http://www.cazabon.com/pyCMS/ HTH has -- http://appscript.sourceforge.net http://rb-appscript.rubyforge.org -- http://mail.python.org/mailman/listinfo/python-list
Re: Question about email-handling modules
On Thu, 20 Dec 2007 09:31:10 +, Robert Latest wrote:
1. Why can I get the 'subject' and 'from' header field unsig the []
notation, but not 'to'? When I print Message.keys I get a list of all
header fields of the message, including 'to'. What's the difference
between message['to'] and message.get('to')?
message['to'] looks up the key 'to', raising an exception if it doesn't
exist. message.get('to') looks up the key and returns a default value if
it doesn't exist.
See help(message.get) for more detail.
2. Why can't I call the get_payload() method on the message? What I get
is this cryptic error: AttributeError: Message instance has no
attribute 'get_payload'. I'm trying to call a method here, not an
attribute. It makes no difference if I put parentheses after get_payload
or not. I looked into the email/Message module and found get_payload
defined there.
All methods are attributes (although the opposite is not the case), so if
a method doesn't exist, you will get an AttributeError.
The email.Message.Message class has a get_payload, but you're not using
that class. You're using mailbox.UnixMailbox, which returns an instance
of rfc822.Message which *doesn't* have a get_payload method.
Damned if I can work out how to actually *use* the email module to read
an mbox mail box. I might have to RTFM :(
http://docs.python.org/lib/module-email.html
http://docs.python.org/lib/module-mailbox.html
*later*
Ah! The Fine Manual is some help after all. Try this:
# copied from http://docs.python.org/lib/mailbox-deprecated.html
import email
import email.Errors
import mailbox
def msgfactory(fp):
try:
return email.message_from_file(fp)
except email.Errors.MessageParseError:
# Don't return None since that will
# stop the mailbox iterator
return ''
fp = file('mymailbox', 'rb')
mbox = mailbox.UnixMailbox(fp, msgfactory)
for message in mbox:
print message.get_payload()
But note that message.get_payload() will return either a string (for
single part emails) or a list of Messages (for multi-part messages).
--
Steven
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Re: Hexadecimal list conversion
On Dec 20, 12:30 pm, Neil Webster [EMAIL PROTECTED] wrote:
Hi All.
I have a list which is a line from a file:
['\x003\x008\x001\x004\x007\x005\x00.\x005\x000\x002\x005\x009\x009\x00',
'\x002\x001\x003\x006\x002\x002\x00.\x001\x007\x004\x002\x008\x002\x00']
This should be in the format:
['381475.502599', '213622.174282']
I've tried a few options using replace (replacing \x00 with ) and
trying to convert from hexademical to decimal.
But nothing has worked. Can anybody give any tips to help?
Is your file utf-16 (that would explain why your file has \x00 in
between every character)? If so, use codecs.open to read it, and you
won't get the \x00's (you'll get a unicode string).
Or you can remove them using replace:
a = a.replace('\x00', '')
HTH
--
Paul Hankin
--
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Re: How to generate pdf file from an html page??
On Dec 19, 10:17 am, Grant Edwards [EMAIL PROTECTED] wrote:
On 2007-12-19, Terry Jones [EMAIL PROTECTED] wrote:
Grant == Grant Edwards [EMAIL PROTECTED] writes:
Grant On 2007-12-19, abhishek [EMAIL PROTECTED] wrote:
Hi everyone, I am trying to generate a PDF printable format file from
an html page. Is there a way to do this using python. If yes then
which library and functions are required and if no then reasons why it
cant be done.
Here's one way:
--html2pdf.py-
#!/usr/bin/python
import os,sys
inputFilename,outputFilename = sys.argv[1:3]
os.system(w3m -dump %s | a2ps -B --borders=no | ps2pdf - %s %
(inputFilename,outputFilename))
Note that this is highly insecure. outputFilename could be passed e.g., as
/tmp/file.pdf; rm -fr /home/abhishek
Here's a half-assed solution:
inputFilename = inputFilename.replace(',)
outputFilename = outputFilename.replace(',)
os.system(w3m -dump '%s' | a2ps -B --borders=no | ps2pdf - '%s' %
(inputFilename,outputFilename))
As somebody else suggested, building the pipeline by hand
using the subprocess module is the most bullet-proof method.
--
Grant Edwards grante Yow! I brought my BOWLING
at BALL -- and some DRUGS!!
visi.com
This looks a little better for me ... | a2ps -B --borders=0 --
columns=1 -f 10.0 | ...
Regards,
Jordan
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RE: Hexadecimal list conversion
Hi All.
I have a list which is a line from a file:
['\x003\x008\x001\x004\x007\x005\x00.\x005\x000\x002\x005\x009
\x009\x00',
'\x002\x001\x003\x006\x002\x002\x00.\x001\x007\x004\x002\x008\
x002\x00']
This should be in the format:
['381475.502599', '213622.174282']
I've tried a few options using replace (replacing \x00 with ) and
trying to convert from hexademical to decimal.
But nothing has worked. Can anybody give any tips to help?
Thanks.
Somthing like:
line =
['\x003\x008\x001\x004\x007\x005\x00.\x005\x000\x002\x005\x009\x009\x00'
,
'\x002\x001\x003\x006\x002\x002\x00.\x001\x007\x004\x002\x008\x002\x00']
result = [''.join(x.split('\x00')) for x in line]
Cheers,
Drea
--
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Re: Hexadecimal list conversion
En Thu, 20 Dec 2007 09:30:14 -0300, Neil Webster [EMAIL PROTECTED]
escribi�:
I have a list which is a line from a file:
['\x003\x008\x001\x004\x007\x005\x00.\x005\x000\x002\x005\x009\x009\x00',
'\x002\x001\x003\x006\x002\x002\x00.\x001\x007\x004\x002\x008\x002\x00']
This should be in the format:
['381475.502599', '213622.174282']
I've tried a few options using replace (replacing \x00 with ) and
trying to convert from hexademical to decimal.
The replace works:
py for item in L:
... print item.replace('\x00','')
...
381475.502599
213622.174282
If you got that from a file, I bet you read it using the wrong encoding.
Try opening the file using codecs.open(filename, rb,
encoding=utf-16-be) instead of plain open. When your read it, you'll get
unicode objects instead of strings, but with the right contents. If you
wish you can convert to strings using
line_read.encode(your_system_encoding); if all your data is numeric the
encoding used is irrelevant and can be omited.
--
Gabriel Genellina
--
http://mail.python.org/mailman/listinfo/python-list
Re: New to Python Would like debug advice
On Dec 17, 9:17 pm, PatrickMinnesota [EMAIL PROTECTED] wrote: Yep, I'm new to the language, it's been a couple of months. I opted for gvim and console window for developing on a Windows XP box. I'm not a huge fan of IDEs except for when I need some debugging. I've done my googling and see a bunch of options out there for a debugging solution for Python on Windows. I've used Eclipse for a few years for Java development and I understand there is a Python module for it that might make sense. What I'm looking for is advice on what to use todebuggeneral Python programs at the source level, some will be graphical. If the eclipse route is the way to go, that's fine, but I'm wondering what other options people have good luck with. Keep in mind I will probably continue to use Vi/Emacs and a console window for my main development. Thanks. Try Winpdb (On Linux as well). -- http://mail.python.org/mailman/listinfo/python-list
Re: int vs long
Hendrik van Rooyen [EMAIL PROTECTED] wrote: Nick Craig-Wood nic...od.com wrote: So you might see longs returned when you expected ints if the result was = 0x800. did you mean 0x8000 ? ;-) Yes - well spotted! -- Nick Craig-Wood [EMAIL PROTECTED] -- http://www.craig-wood.com/nick -- http://mail.python.org/mailman/listinfo/python-list
Re: pypi and easy_install
On 20 Dic, 04:33, Giampaolo Rodola' [EMAIL PROTECTED] wrote: On 20 Dic, 03:47, Istvan Albert [EMAIL PROTECTED] wrote: On Dec 19, 9:44 pm, Istvan Albert [EMAIL PROTECTED] wrote: On Dec 19, 8:07 pm, Giampaolo Rodola' [EMAIL PROTECTED] wrote: download_url = 'http://code.google.com/p/pyftpdlib/downloads/list', this is from looking at your setup.py here: http://pyftpdlib.googlecode.com/svn/trunk/setup.py You're right, the setup.py included in the tarball reports an invalid download url. I fixed the issue in setup.py and used setup.py register for uploading the new package on pypi again. As you can see from here:http://pypi.python.org/pypi?name=pyftpdlibversion=0.2.0:action=disp... ...now the download url is correct, but the problem still remains. :-\ Found the culprit. That's because my download URL points to http://pyftpdlib.googlecode.com/files/pyftpdlib_0.2.0.tar.gz, which is not a valid distutils-generated filename. A valid filename for pytftpdblib would be pyftpdlib-0.2.0.tar.gz. -- http://mail.python.org/mailman/listinfo/python-list
Re: Question about email-handling modules
Steven D'Aprano [EMAIL PROTECTED] wrote: On Thu, 20 Dec 2007 09:31:10 +, Robert Latest wrote: [snip most of question and helpful answer] But note that message.get_payload() will return either a string (for single part emails) or a list of Messages (for multi-part messages). Note also that the mailbox module in python 2.5 is quite unlike the mailbox module in python 2.4 so code written for the 2.4 mailbox will be most unlikely to work under 2.5 without at least some changes. At least that's my experience/understanding. Also, from the way things currently work in the 2.5 version I think there will (hopefully) be some more quite significant changes. -- Chris Green -- http://mail.python.org/mailman/listinfo/python-list
Re: help displaying pdf thru client/server
PaulS [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Connecting to a Linux server from XP pc using a telnet program, I run a report and convert it to a pdf document(using Reportlab) which I need to display. The pdf is on the Linux server. Ideas how to display to the pc would be appreciated. thanks, paul Thanks for the suggestions. I'll look at twisted first. paul -- http://mail.python.org/mailman/listinfo/python-list
Re: .NET and Python Integration Problem and PDF Library (Need Help and Suggestions)
On Dec 18, 7:34 am, Ravi Kumar [EMAIL PROTECTED] wrote: Hi. First I am explaining the Problem so it would not get messed up. :) == PROBLEM I have to integrate a small part in .NET Projects. .NET project is actually all Web-based application, user interface is Web-page for multiple actions. But a backend component of project needs PDF File manipulation. Manipuation is limited to splitting pages, removing certain pages, joining pages, finding certain text information (Title/Author/No. of Pages/Orientation of each page etc), and page orientation maipulation (rotating pages clockwise and anticlockwise, on degree parameter, left/right/flip etc). .NET guys are failing here, so I proposed to do that component in Python. But problem is, how to integrate Python in .NET Web Application. I am looking on IRONPYTHON, and thats the only point seemed to me. Also, as I am not an expert in Python, I have transition from Perl and PHP to python. So right now, my applciation architecture would little bit be inexperienced and not enterprise ready. But every component in project is being worked on Enterprise grade. Now, I want to integrate Python implementation for PDF works, and that would be called from .NET (C#) processes supplying required parameters. Since the whole application would be implemented on MS Windows Server, so I am bit lacking the freedom of library usage as in Linux. Also looking for best PDF library which doesn't have any or many dependencies and that dependencies can be successfully installed. I will also need an XML Library to write down the logs and instructions+information for next component which handles Printing. = Therefore, I am seeking all the precious (even small or one-liner) advices from you. Please suggest me every possible things that come in your mind. Things on high priorities right now are: -- -=Ravi=- This isn't a python reply, but for .NET PDF manipulation, you might look at http://www.pdfbox.org/userguide/dot_net.html -- http://mail.python.org/mailman/listinfo/python-list
Re: Question about email-handling modules
Steven D'Aprano wrote:
message['to'] looks up the key 'to', raising an exception if it doesn't
exist. message.get('to') looks up the key and returns a default value if
it doesn't exist.
Ah, so the [] notation got hung up on some message right at the beginning
and didn't even let the script continue. Makes sense.
All methods are attributes (although the opposite is not the case), so if
a method doesn't exist, you will get an AttributeError.
I see. I've already gathered that Python likes to use different words for
common things (attribute instead of member or method).
Damned if I can work out how to actually *use* the email module to read
an mbox mail box. I might have to RTFM :(
Yeah, I think I haven't picked the right module to get started with.
But note that message.get_payload() will return either a string (for
single part emails) or a list of Messages (for multi-part messages).
Yes, I did note that.
Thanks for the tips (also to the others who have answered).
Python looks like fun though. Maybe I should try to tackle some other
problem first.
robert
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Re: Where best to put local modules?
[EMAIL PROTECTED] a écrit : Bruno Desthuilliers [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] a écrit : I'm just beginning to create some python modules for my own use and I'm wondering where to put them. Initially I have put them in $HOME/bin and I have set PYTHONPATH to point to them there. It all seems to be OK but I was wondering if I might be storing up problems for the future by putting python modules in with my odds and sods of shell scripts etc. (and with my python 'main' scripts). Would I be better off putting the modules somewhere else, e.g. somewhere like $HOME/lib/python? If you're on a shared system and don't have admin access, this last solution is probably the best - pure modules have nothing to do in a bin/ directory indeed. Now if it's your own computer, why not just put them in /path/to/python/libs/site-packages ? There's one of each, a system where I have a shell account but not root access and my home system. There is a disadvantage of putting stuff in the site-packages directory isn't there? If/when I upgrade the system the python modules I have added will effectively not be visible to the upgraded system. I know I can copy them across to the new site-packages but it's just one more chore when upgrading. If they were in $HOME/lib/python this issue wouldn't arise because /home stays the same across upgrades. Yes, true. OTHO, storing modules in your own $HOME/whatever and modifying your $PYTHONPATH accordingly won't make the modules available to other accounts. Which may or not be a problem (it happened to be one for me...). -- http://mail.python.org/mailman/listinfo/python-list
Re: Debugging pipe IPC
Ian Clark wrote: import os os.system(netcat -l -p 1234 localhost) HTH, Nope, but the network theme got me thinking about how one might run Python on a remote host. After a few false starts, Googling remote python shell led me to Guido's ripshell.py (not *that* Guido, a different one). Peeking inside, I discovered the module I'm looking for was code. Remember, in my case, communication on stdin and stdout was all handled by a Pyrex extension. I'm unsure the code below will work in a pure Python application. For posterity, here is itest.py, the solution to my problem: ### itest.py - allows interactive debugging of a filter # # If stdin and stdout are dedicated to your filter script, but you # want to interactively check a few things, try something like this: from code import interact import sys sys.stdout = open(/dev/tty, w) # Rebind Python's lips sys.stdin = open(/dev/tty, r) # and Python's ears. foo = This is a test # Lay down some history interact( # Convenience function from code. At your service, Sir!, # BUG: could be Madam or Miss local = locals())# Teach interpreter some history print Thank you, Sir! # BUG: ibid. To check this works: $ python itest.py /dev/null /dev/full # mother is a deafmute At your service, Sir! foo 'This is a test' ^D (not shown) Thank you, Sir! $ -- http://mail.python.org/mailman/listinfo/python-list
Re: clearing text on canvas
thanx a lot Peter dn -- http://mail.python.org/mailman/listinfo/python-list
Re: Hexadecimal list conversion
Gabriel Genellina [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
En Thu, 20 Dec 2007 09:30:14 -0300, Neil Webster [EMAIL PROTECTED]
escribi�:
I have a list which is a line from a file:
['\x003\x008\x001\x004\x007\x005\x00.\x005\x000\x002\x005\x009\x009\x00',
'\x002\x001\x003\x006\x002\x002\x00.\x001\x007\x004\x002\x008\x002\x00']
This should be in the format:
['381475.502599', '213622.174282']
I've tried a few options using replace (replacing \x00 with ) and
trying to convert from hexademical to decimal.
The replace works:
py for item in L:
... print item.replace('\x00','')
...
381475.502599
213622.174282
If you got that from a file, I bet you read it using the wrong encoding.
Try opening the file using codecs.open(filename, rb,
encoding=utf-16-be) instead of plain open. When your read it, you'll get
unicode objects instead of strings, but with the right contents. If you
wish you can convert to strings using
line_read.encode(your_system_encoding); if all your data is numeric the
encoding used is irrelevant and can be omited.
--
Gabriel Genellina
There is an odd number of bytes in each string. Each begins and ends with
\x00, so it doesn't look like utf-16-be. But replace works:
L=['\x003\x008\x001\x004\x007\x005\x00.\x005\x000\x002\x005\x009\x009\x00','\x002\x001\x003\x006\x002\x002\x00.\x001\x007\x004\x002\x008\x002\x00']
[s.replace('\x00','') for s in L]
['381475.502599', '213622.174282']
-Mark Tolonen
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Re: 3D plotting with python 2.5 on win32
Hi Marek, thanks for the link .. I knew VPython already by I forgot it ( the last time it was only python 2.4 compatible) but as I see they support python 2.5 now ;-) I will check it and thanks again. Anton Hi anton, Have you take a look at vpython? Here's their website:http://www.vpython.org/ And here is an simple example of how to use it:http://linuxgazette.net/144/john.html Hope this helps :-) Cheers, Marek -- http://mail.python.org/mailman/listinfo/python-list
where is uno?
I'm using SUSE 10.3 have installed OpenOffice Python interface from the distro DVD. But still I need help because I can't import uno. And that's because it's not in my site-packages. I read about how to use it and have reviewed code that uses it but no where did any of the articles explain where to retrieve the actual 'uno' py package. Can someone provide a hint? Johnf -- http://mail.python.org/mailman/listinfo/python-list
Re: 3D plotting with python 2.5 on win32
Hi Jason, I know ctypes, my problem is not PyOpenGL itself, but during my tests with different python based 3D tools, some of them depend on PyOpenGL and since PyOPenGL is only available for python 2.4 the story ends here. Sorry I don't actually remember exactly what tool it was, I tried out (or tried to try out) different tools for doing 3D plotting, but skipped most of them since I did not get them to work. (... yes I am a little bit confused since I didnt find something working out of the box). Anton PyOpenGL isn't abandonware. Python 2.5 comes with the ctypes module [1], so there isn't any need for a binary wrapper module anymore. Under 2.5, all pure wrapper binary modules are unnecessary. They can work cross-platform from pure Python, calling directly into the C function code. Trust me, this is an excellent improvement. PyOpenGL probably too low-level for what you want, but it isn't dead yet. (It's just pining for the symbol table.) --Jason [1]http://docs.python.org/lib/module-ctypes.html -- http://mail.python.org/mailman/listinfo/python-list
Re: Hexadecimal list conversion
Mark T wrote: Gabriel Genellina [EMAIL PROTECTED] wrote in message If you got that from a file, I bet you read it using the wrong encoding. Try opening the file using codecs.open(filename, rb, encoding=utf-16-be) instead of plain open. There is an odd number of bytes in each string. Each begins and ends with \x00, so it doesn't look like utf-16-be. I think Gabriel is right. The OP probably butchered the original structure with open(filename).read().split(\n) Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: How to generate pdf file from an html page??
On 2007-12-20, MonkeeSage [EMAIL PROTECTED] wrote: This looks a little better for me ... | a2ps -B --borders=0 -- columns=1 -f 10.0 | ... Right. I forgot that I've adjusted my a2ps defaults to using a single column and a readable font size instead of the standard 2-up tiny-font mode. -- Grant Edwards grante Yow! When you get your at PH.D. will you get able to visi.comwork at BURGER KING? -- http://mail.python.org/mailman/listinfo/python-list
Ping Implementation in Python
Hi, I was wondering if there was a ping implementation written in Python. I'd rather using a Python module that implements ping in a platform/OS-independent way than rely on the underlying OS, especially as every OS has a different implementation. Furthermore, if you're going to ping a large number of IPs, using a module would probably be a lot faster. Any ideas if such a module exists? Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: where is uno?
On Thu, 2007-12-20 at 07:44 -0800, johnf wrote: I'm using SUSE 10.3 have installed OpenOffice Python interface from the distro DVD. But still I need help because I can't import uno. And that's because it's not in my site-packages. I read about how to use it and have reviewed code that uses it but no where did any of the articles explain where to retrieve the actual 'uno' py package. Can someone provide a hint? Find out where the installation placed the uno.py file. It might be somewhere in /path/to/openoffice/program. Once you've found the actual location, set the PYTHONPATH environment variable to that location. HTH, -- Carsten Haese http://informixdb.sourceforge.net -- http://mail.python.org/mailman/listinfo/python-list
Re: Is there *any* real documentation to PyWin32?
On Dec 20, 6:35 am, Benoit [EMAIL PROTECTED] wrote: I understand that the Win32 has been said to be itself poorly documented, so perhaps that the documentation that comes with the modules is of similar quality is no coincidence. Maybe I'm still too young in my programming to grasp the good of that documentation, but for myself, it tells me next to nothing. Could anyone point me to anything which may exist that does a better job of explaining the extensions' use? I tried to take a look @ Microsoft's documentation, but it was confusing. There is Mark Hammond's book [1] about python-win32 though I haven't used it and don't know if it contains anything that would be helpful to you. It is rather old now but some claim that is not important. [2] Personally I consider Python-win32 to be docware -- software that is sufficiently difficult to use with the included free documentation that many people will just buy the $$$ documentation. Numpy is another prominent example of docware. A misappropriation of the good- will value of legitimate open source software. [1]http://www.amazon.com/Python-Programming-Win32-Windows-Programmers/ dp/1565926218/ref=sr_1_1?ie=UTF8s=booksqid=1198165983sr=1-1 [2] http://groups.google.com/group/comp.lang.python/browse_thread/thread/e5a1f274ec411cbe/78b1390a6f6d75b2?hl=enlnk=stq=com+win32+(doc+OR+documentation)+group%3Acomp.lang.python#78b1390a6f6d75b2 -- http://mail.python.org/mailman/listinfo/python-list
Re: where is uno?
It's installed by default with Python 2.5 on Ubuntu. Actually it is a link to /usr/share/pycentral/python-uno/site-packages/uno.py so first do a search for uno.py. If not found post back. -- http://mail.python.org/mailman/listinfo/python-list
How to memoize/cache property access?
I seem to be writing the following boilerplate/pattern quite frequently to avoid hitting the database until absolutely necessary, and to only do it at most once: class Foo(object): @property def expensive(self): if not hasattr(self, '_expensiv'): self._expensive = insert expensive db call here return self._expensive it's a bit verbose, and it violates the DRY (Don't Repeat Yourself) principle -- and it has on at least one occasion resulted in really slow code that produces the correct results (did you spot the typo above?). It would have been nice to be able to write class Foo(object): @property def expensive(self): self.expensive = insert expensive db call here return self.expensive but apparently I can't set [that] attribute :-( I'm contemplating using a decorator to hide the first pattern: def memprop(fn): def _fn(self): # properties only take self memname = '_' + fn.__name__ if not hasattr(self, memname): setattr(self, memname, fn(self)) return getattr(self, memname) return property(fget=_fn, doc=fn.__doc__) which means I can very simply write class Foo(object): @memprop def expensive(self): return insert expensive db call here I'm a bit hesitant to start planting home-grown memprop-s all over the code-base though, so I'm wondering... does this seem like a reasonable thing to do? Am I re-inventing the wheel? Is there a better way to approach this problem? -- bjorn -- http://mail.python.org/mailman/listinfo/python-list
Re: Where best to put local modules?
Bruno Desthuilliers [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] a écrit : Bruno Desthuilliers [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] a écrit : I'm just beginning to create some python modules for my own use and I'm wondering where to put them. Initially I have put them in $HOME/bin and I have set PYTHONPATH to point to them there. It all seems to be OK but I was wondering if I might be storing up problems for the future by putting python modules in with my odds and sods of shell scripts etc. (and with my python 'main' scripts). Would I be better off putting the modules somewhere else, e.g. somewhere like $HOME/lib/python? If you're on a shared system and don't have admin access, this last solution is probably the best - pure modules have nothing to do in a bin/ directory indeed. Now if it's your own computer, why not just put them in /path/to/python/libs/site-packages ? There's one of each, a system where I have a shell account but not root access and my home system. There is a disadvantage of putting stuff in the site-packages directory isn't there? If/when I upgrade the system the python modules I have added will effectively not be visible to the upgraded system. I know I can copy them across to the new site-packages but it's just one more chore when upgrading. If they were in $HOME/lib/python this issue wouldn't arise because /home stays the same across upgrades. Yes, true. OTHO, storing modules in your own $HOME/whatever and modifying your $PYTHONPATH accordingly won't make the modules available to other accounts. Which may or not be a problem (it happened to be one for me...). Probably not for me. OK, thanks for all the responses, it seems there isn't anything of huge consequence that I'm missing so I can just decide what fits my situation best. -- Chris Green -- http://mail.python.org/mailman/listinfo/python-list
Re: Ping Implementation in Python
On Dec 20, 2007 9:41 AM, Mrown [EMAIL PROTECTED] wrote: Hi, I was wondering if there was a ping implementation written in Python. I'd rather using a Python module that implements ping in a platform/OS-independent way than rely on the underlying OS, especially as every OS has a different implementation. Furthermore, if you're going to ping a large number of IPs, using a module would probably be a lot faster. Any ideas if such a module exists? Thanks. There's no point in having a script that pings things, especially large numbers of IPs. If you really want to do network scanning other tools for that already exist. -- http://mail.python.org/mailman/listinfo/python-list
Re: 3D plotting with python 2.5 on win32
On Dec 20, 8:48 am, anton [EMAIL PROTECTED] wrote: Hi Jason, I know ctypes, my problem is not PyOpenGL itself, but during my tests with different python based 3D tools, some of them depend on PyOpenGL and since PyOPenGL is only available for python 2.4 the story ends here. Sorry I don't actually remember exactly what tool it was, I tried out (or tried to try out) different tools for doing 3D plotting, but skipped most of them since I did not get them to work. (... yes I am a little bit confused since I didnt find something working out of the box). Anton PyOpenGL isn't abandonware. Python 2.5 comes with the ctypes module [1], so there isn't any need for a binary wrapper module anymore. Under 2.5, all pure wrapper binary modules are unnecessary. They can work cross-platform from pure Python, calling directly into the C function code. Trust me, this is an excellent improvement. PyOpenGL probably too low-level for what you want, but it isn't dead yet. (It's just pining for the symbol table.) --Jason [1]http://docs.python.org/lib/module-ctypes.html That's just it: PyOpenGL is available for Python 2.5. Go to http:// pyopengl.sourceforge.net/ctypes/using.html for information about getting and installing it. Obviously, I don't know what problems are with the tools you tried. There may be backward-compatibility problems that I haven't encountered with PyOpenGL on Python 2.5. I do hope this helps you, even if only a little bit. --Jason -- http://mail.python.org/mailman/listinfo/python-list
Re: Where best to put local modules?
Wherever it is physically located, I would suggest linking the dir to / usr/lib/python/site-python (on a Linux system). AFAIK the sole purpose of this dir is for the type of thing you are describing. On my system it also gets copied when Python is updated. What permissions you give the dir is up to you. Also, you probably want it somewhere that gets backed up routinely or you may loose your latest and greatest version if there is a crash, etc.. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to memoize/cache property access?
thebjorn [EMAIL PROTECTED] wrote: It would have been nice to be able to write class Foo(object): @property def expensive(self): self.expensive = insert expensive db call here return self.expensive but apparently I can't set [that] attribute :-( You can set and access it directly in __dict__. How about something along these lines: def cachedproperty(f): name = f.__name__ def getter(self): try: return self.__dict__[name] except KeyError: res = self.__dict__[name] = f(self) return res return property(getter) class Foo(object): @cachedproperty def expensive(self): print expensive called return 42 f = Foo() f.expensive expensive called 42 f.expensive 42 It is still calling the getter every time though, so not as fast as a plain attribute lookup. -- http://mail.python.org/mailman/listinfo/python-list
Re: Is there a simple way to parse this string ?
On Dec 19, 8:44 pm, Paul McGuire [EMAIL PROTECTED] wrote: I think the last thread of this nature also cited a similar tool by the effbot, which he describes here:http://www.effbot.org/zone/simple-iterator-parser.htm. This parser is about 10X faster than the equivalent pyparsing parser. Here's the relevant thread: http://preview.tinyurl.com/2aeswn. Note that the builtin eval() is around 5x faster than this parser, and from the statement above, 50x faster than the pyparsing solution. George -- http://mail.python.org/mailman/listinfo/python-list
Re: How to memoize/cache property access?
On Dec 20, 5:02 pm, thebjorn [EMAIL PROTECTED] wrote: I seem to be writing the following boilerplate/pattern quite frequently to avoid hitting the database until absolutely necessary ... I use the following module: $ cat cache.py class cached(property): 'Convert a method into a cached attribute' def __init__(self, method): private = '_' + method.__name__ def fget(s): try: return getattr(s, private) except AttributeError: value = method(s) setattr(s, private, value) return value def fdel(s): del s.__dict__[private] super(cached, self).__init__(fget, fdel=fdel) @staticmethod def reset(self): cls = self.__class__ for name in dir(cls): attr = getattr(cls, name) if isinstance(attr, cached): delattr(self, name) if __name__ == '__main__': # a simple test import itertools counter = itertools.count() class Test(object): @cached def foo(self): return counter.next() reset = cached.reset p = Test() print p.foo print p.foo p.reset() print p.foo print p.foo p.reset() print p.foo Michele Simionato -- http://mail.python.org/mailman/listinfo/python-list
Re: Ping Implementation in Python
On Dec 20, 6:13 pm, Chris Mellon [EMAIL PROTECTED] wrote: On Dec 20, 2007 9:41 AM, Mrown [EMAIL PROTECTED] wrote: Hi, I was wondering if there was a ping implementation written in Python. I'd rather using a Python module that implements ping in a platform/OS-independent way than rely on the underlying OS, especially as every OS has a different implementation. Furthermore, if you're going to ping a large number of IPs, using a module would probably be a lot faster. Any ideas if such a module exists? Thanks. There's no point in having a script that pings things, especially large numbers of IPs. If you really want to do network scanning other tools for that already exist. Thanks. Actually, I was more interested in the OS neutral part than in pinging a large number of IPs. Instead, I want to ping a number of IPs (under 10) in an OS/platform independent manner and take the necessary action depending on the results. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: Ping Implementation in Python
Nel mezzo del cammin di nostra vita, mi ritrovai con Mrown che diceva:
Hi,
I was wondering if there was a ping implementation written in
Python. I'd rather using a Python module that implements ping in a
platform/OS-independent way than rely on the underlying OS, especially
as every OS has a different implementation. Furthermore, if you're
going to ping a large number of IPs, using a module would probably be a
lot faster. Any ideas if such a module exists? Thanks.
Get Scapy, it's one of the best tool for this kind of problem, and it's
Python based
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Le opinioni dei fanatici prescindono dai fatti
python -c print 'bG9ybWF5bmFAZ21haWwuY29t'.decode('base64')
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Re: Is there *any* real documentation to PyWin32?
On Dec 20, 9:57 am, [EMAIL PROTECTED] wrote: On Dec 20, 6:35 am, Benoit [EMAIL PROTECTED] wrote: I understand that the Win32 has been said to be itself poorly documented, so perhaps that the documentation that comes with the modules is of similar quality is no coincidence. Maybe I'm still too young in my programming to grasp the good of that documentation, but for myself, it tells me next to nothing. Could anyone point me to anything which may exist that does a better job of explaining the extensions' use? I tried to take a look @ Microsoft's documentation, but it was confusing. There is Mark Hammond's book [1] about python-win32 though I haven't used it and don't know if it contains anything that would be helpful to you. It is rather old now but some claim that is not important. [2] Personally I consider Python-win32 to be docware -- software that is sufficiently difficult to use with the included free documentation that many people will just buy the $$$ documentation. Numpy is another prominent example of docware. A misappropriation of the good- will value of legitimate open source software. [1]http://www.amazon.com/Python-Programming-Win32-Windows-Programmers/ dp/1565926218/ref=sr_1_1?ie=UTF8s=booksqid=1198165983sr=1-1 [2]http://groups.google.com/group/comp.lang.python/browse_thread/thread/... The book of which you speak is still relevant since the Microsoft's API hasn't changed much. Everything I've tried of their examples has worked. Unfortunately, it is kind of expensive. Mike -- http://mail.python.org/mailman/listinfo/python-list
Amusement - rotational palindrome generator
Here is some semi-obfuscated Python, to generate rotational palindromes: from random import choice base = sznuoxpqbdMWOINZXSH rot = dict(zip(base,szunoxdbqpWMOINZXSH)) for i in range(40): s1 = [choice(base) for j in range(choice((2,3,4)))] start = (1,2)[rot[s1[-1]]==s1[-1] and choice((True,False))] s2 = [rot[c] for c in s1[-start::-1]] print .join(s1+s2) Enjoy! -- Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: How to memoize/cache property access?
On Dec 20, 5:43 pm, Michele Simionato [EMAIL PROTECTED] wrote: On Dec 20, 5:02 pm, thebjorn [EMAIL PROTECTED] wrote: I seem to be writing the following boilerplate/pattern quite frequently to avoid hitting the database until absolutely necessary ... I use the following module: [...] I love it! much better name too ;-) I changed your testcase to include a second cached property (the naming is in honor of my late professor in Optimization of Functional Languages class: ...any implementation that calls bomb_moscow is per definition wrong, even if the program produces the correct result... -- it was a while ago ;-) if __name__ == '__main__': # a simple test import itertools counter = itertools.count() class Test(object): @cached def foo(self): return counter.next() @cached def bomb_moscow(self): print 'fire missiles' return counter.next() reset = cached.reset it didn't start WWIII, but I had to protect attribute deletion to get it to run: def fdel(s): if private in s.__dict__: del s.__dict__[private] I'm a bit ambivalent about the reset functionality. While it's a wonderful demonstration of a staticmethod, the very few times I've felt the need to freshen-up the object, I've always felt it was best to create it again from scratch. Do you have many uses of it in your code? -- bjorn -- http://mail.python.org/mailman/listinfo/python-list
Python; jump to a concrete line
Hi, sorry but after looking for information, I still did not get how, when reading a text file in python, can one jump to a concrete line and then read the different data (separated by spaces). In each line there is different number of columns so sometimes i get kind of index out error. Is there a better way to read the different data on each row and avoiding to know the exact number of columns ? Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: How to memoize/cache property access?
On Dec 20, 6:40 pm, thebjorn I'm a bit ambivalent about the reset functionality. While it's a wonderful demonstration of a staticmethod, the very few times I've felt the need to freshen-up the object, I've always felt it was best to create it again from scratch. Do you have many uses of it in your code? My use case is for web applications where the configuration parameters are stored in a database. If you change them, you can re-read them by resetting the configuration object (you may have a reset button in the administrator Web user interface) without restarting the application. Michele Simionato -- http://mail.python.org/mailman/listinfo/python-list
Re: Python; jump to a concrete line
On Dec 20, 7:56 pm, Horacius ReX [EMAIL PROTECTED] wrote:
Hi, sorry but after looking for information, I still did not get how,
when reading a text file in python, can one jump to a concrete line
and then read the different data (separated by spaces). In each line
there is different number of columns so sometimes i get kind of index
out error. Is there a better way to read the different data on each
row and avoiding to know the exact number of columns ?
Thanks
If you are working with a file that is of a fixed length you can use
the .seek() function
ie. 500 characters per line, and a newline character is an additional
one then for the 10th line you would do:
file_input.seek(5010, 0)
file_input.readline()
If it is not a fixed length file you can do:
line_to_seek = 9 # for the 10th line, you need to look for num9 as
counting starts @ 0
for (i, line) in enumerate(file_input):
if i == line_to_seek:
process the line
As for combatting the issue of lack of data on a line, do something
like:
line_contents = line.split(' ')
if len( line_contents ) = required_elements:
do something
else:
print 'failed'
--
http://mail.python.org/mailman/listinfo/python-list
Re: 3D plotting with python 2.5 on win32
On Dec 19, 8:15 am, anton [EMAIL PROTECTED] wrote: Hi, I would like to know if some of you knows a - working - actual - out of the box (for me: binaries available) Package/Lib to do 3D plotting out of the box. There is MayaVi from enthon but you need to use their python (2.4.3), all other stuff need picking sources etc. Hi Anton, You actually don't need to use the enthon installer (and definitely not the 2.4.3-based one) in order to get MayaVi. You will need to have setuptools installed. Then, you should run: easy_install -f http://code.enthought.com/enstaller/eggs/windows/xp VTK enthought.mayavi[nonets] It's important to include [nonets] so that you will get scipy and numpy as well. Here are some links for getting started with MayaVI: Mayavi Cookbook: http://scipy.org/Cookbook/MayaVi MLab: http://www.scipy.org/Cookbook/MayaVi/mlab From your posts it sounds like you really want to use something like MLab. On a side note, we are almost done putting together an updated one- click installer of python + packages for scientific computing. This will be based on Python 2.5, will include most of what was included in the 2.4.3-based installer, and will be available for multiple platforms. -Peter -- http://mail.python.org/mailman/listinfo/python-list
xml-filter with XMLFilterBase() and XMLGenerator() shuffles attributes
Hello! I've made a trivial xml filter to modify some attributes on-the-fly: ... from __future__ import with_statement import os import sys from xml import sax from xml.sax import saxutils class ReIdFilter(saxutils.XMLFilterBase): def __init__(self, upstream, downstream): saxutils.XMLFilterBase.__init__(self, upstream) self.__downstream = downstream return def startElement(self, name, attrs): self.__downstream.startElement(name, attrs) return def startElementNS(self, name, qname, attrs): self.__downstream.startElementNS(name, qname, attrs) return def endElement(self, name): self.__downstream.endElement(name) return def endElementNS(self, name, qname): self.__downstream.endElementNS(name, qname) return def processingInstruction(self, target, body): self.__downstream.processingInstruction(target, body) return def comment(self, body): self.__downstream.comment(body) return def characters(self, text): self.__downstream.characters(text) return def ignorableWhitespace(self, ws): self.__downstream.ignorableWhitespace(ws) return ... with open(some_file_path, 'w') as f: parser = sax.make_parser() downstream_handler = saxutils.XMLGenerator(f, 'cp1251') filter_handler = ReIdFilter(parser, downstream_handler) filter_handler.parse(file_path) I want prevent it from shuffling attributes, i.e. preserve original file's attribute order. Is there any ContentHandler.features* responsible for that? -- http://mail.python.org/mailman/listinfo/python-list
Re: Python; jump to a concrete line
Horacius ReX [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi, sorry but after looking for information, I still did not get how, when reading a text file in python, can one jump to a concrete line and then read the different data (separated by spaces). In each line there is different number of columns so sometimes i get kind of index out error. Is there a better way to read the different data on each row and avoiding to know the exact number of columns ? Have you considered using the file.readlines() method? Russ -- http://mail.python.org/mailman/listinfo/python-list
Re: Problem untaring python2.5
abhishek [EMAIL PROTECTED] wrote: Hi everyone , i am not able to untar python 2.5 source code using tar -xvzf . Is it a problem with my system settings or python 2.5 itself. When i tried to do it it resulted in following errors -- tar: Skipping to next header Python-2.5/Mac/Resources/app/Resources/English.lproj/Documentation/ide/ new_window_made.gif tar: Python-2.5/Mac/Resources/app/Resources/English.lproj/ Documentation/ide/new_window_made.gif: Cannot open: No such file or directory tar can't write the unpacked files because the directory they belong to doesn't exist. Most likely that's because tar can't create the directory either. Do you have write permission for the directory where you want to unpack to? Can you create the directory Python-2.5 by hand (mkdir Python-2.5)? Florian -- http://www.florian-diesch.de/ --- ** Hi! I'm a signature virus! Copy me into your signature, please! ** --- -- http://mail.python.org/mailman/listinfo/python-list
Re: pydoc - how to generate documentation for an entire package?
kirillrd [EMAIL PROTECTED] wrote: On Nov 20, 4:28 pm, Jens [EMAIL PROTECTED] wrote: On 20 Nov., 08:19, Marc 'BlackJack' Rintsch [EMAIL PROTECTED] wrote: On Mon, 19 Nov 2007 10:50:28 -0800, Jens wrote: Generating documentation form code is a nice thing, but this pydoc.py is driving me insane - isn't there are better way? Epydoc!? Ciao, Marc 'BlackJack' Rintsch Thanks! Epydoc looks promising - shame about the user interface though :-( There is also happydoc , much less features , but still nice :-) I like apydia http://apydia.ematia.de/ Florian -- http://www.florian-diesch.de/ --- ** Hi! I'm a signature virus! Copy me into your signature, please! ** --- -- http://mail.python.org/mailman/listinfo/python-list
Passing by reference
Is the following correct? x = some string x is a reference to some string foo(x) Reference is passed to function. In foo: x += change Strings are immutable, so x in foo() now points to a different string than x outside foo(). Right? Back outside foo. x = [some string] x is a reference to a list whose first element is a reference to a string. foo(x) Within foo: x[0] += other Another string is created, the first element of x is modified to point to the new string and back outside foo(), x[0] will point to the new string. Right? -- http://mail.python.org/mailman/listinfo/python-list
How to make this Python code print blocks of text?
This code prints output in rows like this: ** ** ** How to make print in blocks like this? * * ** * * ** * * * start= int (raw_input(StartTable?)) upperlimit= int (raw_input (FinalTable?)) cycle= start while cycle = upperlimit: ...table= cycle ...counter= 0 ...while counter 10: ..counter= counter + 1 ..print table, X, counter, =, counter * table ...cycle= cycle + 1 The program prints multyply tables like this 4 X1 = 4 4 X2 = 8 5 X 1= 5 5 X 2= 10 6 X1= 6 6 X2= 12 etc. And needs to print like this: 4 X1 = 4.5 X 1= 5.. 6 X 1= 1 4 X2 = 8. 5 x 2=10. 6 X 2= 12 Thanks in advance for any help -- http://mail.python.org/mailman/listinfo/python-list
Re: Python; jump to a concrete line
On Dec 20, 8:13 pm, Russell Blau [EMAIL PROTECTED] wrote: Horacius ReX [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi, sorry but after looking for information, I still did not get how, when reading a text file in python, can one jump to a concrete line and then read the different data (separated by spaces). In each line there is different number of columns so sometimes i get kind of index out error. Is there a better way to read the different data on each row and avoiding to know the exact number of columns ? Have you considered using the file.readlines() method? Russ .readlines() will hog some resources on large files. file.read().splitlines()[ line_to_seek ] might be the fastest way for small files, but also will swell for larger ones. Also, one line way to get what you want: [a for (i,a) in enumerate(input_file) if i == line_to_seek] -- http://mail.python.org/mailman/listinfo/python-list
Re: How to make this Python code print blocks of text?
On Dec 20, 9:00 pm, chriswilliams [EMAIL PROTECTED] wrote: This code prints output in rows like this: ** ** ** How to make print in blocks like this? * * ** * * ** * * * start= int (raw_input(StartTable?)) upperlimit= int (raw_input (FinalTable?)) cycle= start while cycle = upperlimit: ...table= cycle ...counter= 0 ...while counter 10: ..counter= counter + 1 ..print table, X, counter, =, counter * table ...cycle= cycle + 1 The program prints multyply tables like this 4 X1 = 4 4 X2 = 8 5 X 1= 5 5 X 2= 10 6 X1= 6 6 X2= 12 etc. And needs to print like this: 4 X1 = 4.5 X 1= 5.. 6 X 1= 1 4 X2 = 8. 5 x 2=10. 6 X 2= 12 Thanks in advance for any help The reason for it printing on multiple lines is because the print statement adds a newline character to the end of the existing line. You can get around this by throwing times table into a list and then joining them. for x in xrange(start, (upperlimit+1)): print '...'.join(['%i X %i = %i'%(x, j, (x*j)) for j in xrange(1,11)]) Some things to remember, rather use iterators than creating them yourself with integer variables and incrementing them. Also the easier syntax for incrementing counters yourself is 'counter += 1' instead of the uglier 'counter = counter + 1'. For the string you are printing, look into string formatting rather than dumping things like 'print table, X, counter, =, counter * table' as print '%i X %i = %i' % (table, counter, (table*counter)) is so much neater and easier to comprehend especially if you end up with a long ass string all muddled together. HTH, Chris -- http://mail.python.org/mailman/listinfo/python-list
Re: Ping Implementation in Python
On Dec 20, 5:41 am, Mrown [EMAIL PROTECTED] wrote: Hi, I was wondering if there was a ping implementation written in Python. http://www.gnist.org/~lars/code/ping/ping.html -- http://mail.python.org/mailman/listinfo/python-list
Accessing Visuall C++ DLL with Python
I recently obtained USB device. Other users of the device apparently use C or C++ to access it. I am more comfortable with Python and have used it for other USB devices on a Windows system. I'm more of a hacker than a programmer especially when it comes to Windows. The manufacturor supplies xxx.h, xxx.lib and xxx.dll generated using Microsoft Visual C++. Are all DLLs made equal? Does the manufacturor need to generate a specific dll for Python? Thanks, John -- http://mail.python.org/mailman/listinfo/python-list
Re: Python; jump to a concrete line
Horacius ReX [EMAIL PROTECTED] writes: Hi, sorry but after looking for information, I still did not get how, when reading a text file in python, can one jump to a concrete line and then read the different data (separated by spaces). In each line there is different number of columns so sometimes i get kind of index out error. Is there a better way to read the different data on each row and avoiding to know the exact number of columns ? Consider using linecache: http://docs.python.org/lib/module-linecache.html HTH, Rob -- http://mail.python.org/mailman/listinfo/python-list
Re: Hexadecimal list conversion
On Dec 21, 2:51 am, Peter Otten [EMAIL PROTECTED] wrote: Mark T wrote: Gabriel Genellina [EMAIL PROTECTED] wrote in message If you got that from a file, I bet you read it using the wrong encoding. Try opening the file using codecs.open(filename, rb, encoding=utf-16-be) instead of plain open. There is an odd number of bytes in each string. Each begins and ends with \x00, so it doesn't look like utf-16-be. I think Gabriel is right. The OP probably butchered the original structure with open(filename).read().split(\n) Or he's read the file normally and then done line = lineZAP where ZAP is one of [:-1], .rstrip(), .rstrip(\n), etc However that accounts only for the rightmost trailing \x00. Looks like each line has been chainsawed with .split(,) or whatever the original field separator was. If Gabriel's instructions don't work for the OP, the OP should show us an unambiguous representation of the first few bytes of the original file, instead of leaving it to guesswork: print repr(open(the_file, rb).read()[:200]) -- http://mail.python.org/mailman/listinfo/python-list
readlines() reading incorrect number of lines?
Hi, I'm currently using Python to deal with a fairly large text file (800 MB), which I know has about 85,000 lines of text. I can confirm this because (1) I built the file myself, and (2) running a basic Java program to count lines yields a number in that range. However, when I use Python's various methods -- readline(), readlines(), or xreadlines() and loop through the lines of the file, the line program exits at 16,000 lines. No error output or anything -- it seems the end of the loop was reached, and the code was executed successfully. I'm baffled and confused, and would be grateful for any advice as to what I'm doing wrong, or why this may be happening. Thank you, Wojciech Gryc -- http://mail.python.org/mailman/listinfo/python-list
Regex Matching on Readline()
Anyone have any trouble pattern matching on lines returned by readline? Here's an example: string = Accounting - General pat = .+\s- Should match on Accounting -. However, if I read that string in from a file it will not match. In fact, I can't get anything to match except .*. I'm almost certain that it has something to do with the characters that python returns from readline(). If I have this in a file: Accounting - General And do a: line = f.readline() print line I get: A c c o u n t i n g - G e n e r a l Not sure why, I'm a nub at Python so any help is appreciated. They look like spaces to me, but aren't (I've tried matching on spacs too) - james -- http://mail.python.org/mailman/listinfo/python-list
Re: Passing by reference
[EMAIL PROTECTED] writes: Is the following correct? [lots of references to references] All good so far. x[0] += other Another string is created, the first element of x is modified to point to the new string and back outside foo(), x[0] will point to the new string. Change these to talk about references again and it'll be true also: Another string is created, the first element of x now refers to the new string and back outside foo(), x is still a reference to the same list (so its first element is a reference to the same string). Right? Right. In Python, all names, and all elements of container objects, are references to the corresponding objects. Python has no concept of pointers in the style of C-like languages. -- \I fly Air Bizarre. You buy a combination one-way round-trip | `\ticket. Leave any Monday, and they bring you back the previous | _o__) Friday. That way you still have the weekend. -- Steven Wright | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: Passing by reference
On Dec 21, 5:57 am, [EMAIL PROTECTED] wrote: Is the following correct? x = some string x is a reference to some string foo(x) Reference is passed to function. In foo: x += change Strings are immutable, so x in foo() now points to a different string than x outside foo(). Right? Back outside foo. x = [some string] x is a reference to a list whose first element is a reference to a string. foo(x) Within foo: x[0] += other Another string is created, the first element of x is modified to point Somewhat colloquial/abbreviated. x is a reference. It does not have elements. You mean ... the first element of the list to which x refers is modified to the new string and back outside foo(), x[0] will point to the new string. Right? Close enough. -- http://mail.python.org/mailman/listinfo/python-list
Re: Regex Matching on Readline()
On Dec 21, 6:50 am, jwwest [EMAIL PROTECTED] wrote: Anyone have any trouble pattern matching on lines returned by readline? Here's an example: string = Accounting - General pat = .+\s- Should match on Accounting -. However, if I read that string in from a file it will not match. In fact, I can't get anything to match except .*. I'm almost certain that it has something to do with the characters that python returns from readline(). If I have this in a file: Accounting - General And do a: line = f.readline() print line I get: A c c o u n t i n g - G e n e r a l Not sure why, I'm a nub at Python so any help is appreciated. They look like spaces to me, but aren't (I've tried matching on spacs too) - james To find out what the pseudo-spaces are, do this: print repr(open(the_file, rb).read()[:100]) and show us (copy/paste) what you get. Also, tell us what platform you are running Python on, and how the file was created (by what software, on what platform). -- http://mail.python.org/mailman/listinfo/python-list
Re: Regex Matching on Readline()
On Dec 20, 2:13 pm, John Machin [EMAIL PROTECTED] wrote: On Dec 21, 6:50 am, jwwest [EMAIL PROTECTED] wrote: Anyone have any trouble pattern matching on lines returned by readline? Here's an example: string = Accounting - General pat = .+\s- Should match on Accounting -. However, if I read that string in from a file it will not match. In fact, I can't get anything to match except .*. I'm almost certain that it has something to do with the characters that python returns from readline(). If I have this in a file: Accounting - General And do a: line = f.readline() print line I get: A c c o u n t i n g - G e n e r a l Not sure why, I'm a nub at Python so any help is appreciated. They look like spaces to me, but aren't (I've tried matching on spacs too) - james To find out what the pseudo-spaces are, do this: print repr(open(the_file, rb).read()[:100]) and show us (copy/paste) what you get. Also, tell us what platform you are running Python on, and how the file was created (by what software, on what platform). Here's my output: 'A\x00c\x00c\x00o\x00u\x00n\x00t\x00i\x00n\x00g\x00 \x00-\x00 \x00G \x00e\x00n\x00e\x00r\x00a\x00l\x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00' I'm running Python on Windows. The file was initially created as output from SQL Management Studio. I've re-saved it using TextPad which tells me it's Unicode and PC formatted. -- http://mail.python.org/mailman/listinfo/python-list
Re: xml-filter with XMLFilterBase() and XMLGenerator() shuffles attributes
def startElement(self, name, attrs): self.__downstream.startElement(name, attrs) return I want prevent it from shuffling attributes, i.e. preserve original file's attribute order. Is there any ContentHandler.features* responsible for that? I suspect not. attrs is a dictionary which does not maintain order, and XML attributes are unordered to begin with. Is there any reason other than aesthetics that you want the order preserved? It shouldn't matter to any upstream consumer of the filtered XML. -- http://mail.python.org/mailman/listinfo/python-list
Re: readlines() reading incorrect number of lines?
On Dec 21, 6:48 am, Wojciech Gryc [EMAIL PROTECTED] wrote: Hi, I'm currently using Python to deal with a fairly large text file (800 MB), which I know has about 85,000 lines of text. I can confirm this because (1) I built the file myself, and (2) running a basic Java program to count lines yields a number in that range. However, when I use Python's various methods -- readline(), readlines(), or xreadlines() and loop through the lines of the file, the line program exits at 16,000 lines. No error output or anything -- it seems the end of the loop was reached, and the code was executed successfully. I'm baffled and confused, and would be grateful for any advice as to what I'm doing wrong, or why this may be happening. What platform, what version of python? One possibility: you are running this on Windows and the file contains Ctrl-Z aka chr(26) aka '\x1a'. -- http://mail.python.org/mailman/listinfo/python-list
Using ctypes with lib not found via ldconfig
I'd like to use ctypes for my Linux app, but the libraries i want to use it on aren't in a standard location, and can't be found via ldconfig. They aren't in any of the directories listed in /etc/ld.so.conf, and they won't be. Our IT dept. controls this, and won't make them normally accessible for me. So, how do i steer ctypes towards these libs? Let's say this is one of them: /home/me/otherLibs/libgaak.so.6 tia, eric -- http://mail.python.org/mailman/listinfo/python-list
Re: readlines() reading incorrect number of lines?
Hi, Python 2.5, on Windows XP. Actually, I think you may be right about \x1a -- there's a few lines that definitely have some strange character sequences, so this would make sense... Would you happen to know how I can actually fix this (e.g. replace the character)? Since Python doesn't see the rest of the file, I don't even know how to get to it to fix the problem... Due to the nature of the data I'm working with, manual editing is also not an option. Thanks, Wojciech On Dec 20, 3:30 pm, John Machin [EMAIL PROTECTED] wrote: On Dec 21, 6:48 am, Wojciech Gryc [EMAIL PROTECTED] wrote: Hi, I'm currently using Python to deal with a fairly large text file (800 MB), which I know has about 85,000 lines of text. I can confirm this because (1) I built the file myself, and (2) running a basic Java program to count lines yields a number in that range. However, when I use Python's various methods -- readline(), readlines(), or xreadlines() and loop through the lines of the file, the line program exits at 16,000 lines. No error output or anything -- it seems the end of the loop was reached, and the code was executed successfully. I'm baffled and confused, and would be grateful for any advice as to what I'm doing wrong, or why this may be happening. What platform, what version of python? One possibility: you are running this on Windows and the file contains Ctrl-Z aka chr(26) aka '\x1a'. -- http://mail.python.org/mailman/listinfo/python-list
Re: Regex Matching on Readline()
On Dec 21, 7:21 am, jwwest [EMAIL PROTECTED] wrote:
On Dec 20, 2:13 pm, John Machin [EMAIL PROTECTED] wrote:
On Dec 21, 6:50 am, jwwest [EMAIL PROTECTED] wrote:
Anyone have any trouble pattern matching on lines returned by
readline? Here's an example:
string = Accounting - General
pat = .+\s-
Should match on Accounting -. However, if I read that string in from
a file it will not match. In fact, I can't get anything to match
except .*.
I'm almost certain that it has something to do with the characters
that python returns from readline(). If I have this in a file:
Accounting - General
And do a:
line = f.readline()
print line
I get:
A c c o u n t i n g - G e n e r a l
Not sure why, I'm a nub at Python so any help is appreciated. They
look like spaces to me, but aren't (I've tried matching on spacs too)
- james
To find out what the pseudo-spaces are, do this:
print repr(open(the_file, rb).read()[:100])
and show us (copy/paste) what you get.
Also, tell us what platform you are running Python on, and how the
file was created (by what software, on what platform).
Here's my output:
'A\x00c\x00c\x00o\x00u\x00n\x00t\x00i\x00n\x00g\x00 \x00-\x00 \x00G
\x00e\x00n\x00e\x00r\x00a\x00l\x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00
\x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00
\x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00 \x00'
I'm running Python on Windows. The file was initially created as
output from SQL Management Studio. I've re-saved it using TextPad
which tells me it's Unicode and PC formatted.
Unicode means utf16.
Try this:
import codecs
f = codecs.open(the_file, r, encoding=utf16le)
for uline in f:
line = uline.encode('cp1252') # or some other encoding if my guess
isn't correct
# proceed as usual
Cheers,
John
--
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Re: Connecting to SQL database
On Fri, 14 Dec 2007 23:35:00 -0300, Gabriel Genellina [EMAIL PROTECTED] wrote: En Fri, 14 Dec 2007 23:24:24 -0300, Unknown [EMAIL PROTECTED] escribió: I have successfully connected to SQL2000 and MSDEE databases in the past, however I have to move to SQL2005 and SQLEXPRESS databases now. Conn.ConnectionString = Provider=SQLNCLI;Server=10.1.1.2; Database=csrctest;Uid=bill;Pwd=bill Look for the right spelling at http://www.connectionstrings.com/ looks like my spelling is ok, any other ideas? thanks for the suggestion above. kind regards bill -- http://mail.python.org/mailman/listinfo/python-list
Re: readlines() reading incorrect number of lines?
On Dec 21, 7:41 am, Wojciech Gryc [EMAIL PROTECTED] wrote:
Hi,
Python 2.5, on Windows XP. Actually, I think you may be right about
\x1a -- there's a few lines that definitely have some strange
character sequences, so this would make sense... Would you happen to
know how I can actually fix this (e.g. replace the character)? Since
Python doesn't see the rest of the file, I don't even know how to get
to it to fix the problem... Due to the nature of the data I'm working
with, manual editing is also not an option.
Please don't top-post.
Quick hack to remove all occurrences of '\x1a' (untested):
fin = open('old_file', 'rb') # note b BINARY
fout = open('new_file', 'wb')
blksz = 1024 * 1024
while True:
blk = fin.read(blksz)
if not blk: break
fout.write(blk.replace('\x1a', ''))
fout.close()
fin.close()
You may however want to investigate the strange character sequences
that have somehow appeared in your file after you built it
yourself :-)
HTH,
John
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Re: Passing by reference
... the first element of the list to which x refers is a reference to the new string and back outside foo, the first element of the list to which x refers will be a reference to the new string. Right? -- http://mail.python.org/mailman/listinfo/python-list
Re: Connecting to SQL database
On Dec 14, 8:24 pm, bill ramsay [EMAIL PROTECTED] wrote:
Hi
I have successfully connected to SQL2000 and MSDEE databases in the
past, however I have to move to SQL2005 and SQLEXPRESS databases now.
I've tried the following but with no luck [this is what i used in the
earlier incarnation except the Provider resource was SQLOLEDB.1]
Conn = Dispatch('ADODB.Connection')
Conn.ConnectionString = Provider=SQLNCLI;Server=10.1.1.2;
Database=csrctest;Uid=bill;Pwd=bill
print Conn.ConnectionString
try:
print 'trying to open'
Conn.Open()
etc.
All I ever get to is the trying to openline, then it times out.
I have tried all of the following combinations too:
Provider=SQLNCLI;Server=localhost;Database=csrctest;Uid=bill;Pwd=bill;
Provider=SQLNCLI;Server=localhost\SQLEXPRESS;Database=csrctest;Uid=bill;Pwd=bill;
The SQLEXPRESS database for testing purposes is on my home PC
[10.1.1.2]
Any clues s to where I am going wrong?
Look forward to hearing from someone, anyone!!
Kind regards
Bill
What Python module are you using? At first I thought you were using
the adodb module for Python, but your syntax doesn't look right for
that one.
Mike
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Re: readlines() reading incorrect number of lines?
[Fixing top-posting.] On Thu, 20 Dec 2007 12:41:44 -0800, Wojciech Gryc wrote: On Dec 20, 3:30 pm, John Machin [EMAIL PROTECTED] wrote: [snip] However, when I use Python's various methods -- readline(), readlines(), or xreadlines() and loop through the lines of the file, the line program exits at 16,000 lines. No error output or anything -- it seems the end of the loop was reached, and the code was executed successfully. ... One possibility: you are running this on Windows and the file contains Ctrl-Z aka chr(26) aka '\x1a'. Hi, Python 2.5, on Windows XP. Actually, I think you may be right about \x1a -- there's a few lines that definitely have some strange character sequences, so this would make sense... Would you happen to know how I can actually fix this (e.g. replace the character)? Since Python doesn't see the rest of the file, I don't even know how to get to it to fix the problem... Due to the nature of the data I'm working with, manual editing is also not an option. Thanks, Wojciech Open the file in binary mode: open(filename, 'rb') and Windows should do no special handling of Ctrl-Z characters. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Connecting to SQL database
On Dec 14, 8:24 pm, bill ramsay [EMAIL PROTECTED] wrote:
Hi
I have successfully connected to SQL2000 and MSDEE databases in the
past, however I have to move to SQL2005 and SQLEXPRESS databases now.
I've tried the following but with no luck [this is what i used in the
earlier incarnation except the Provider resource was SQLOLEDB.1]
Conn = Dispatch('ADODB.Connection')
Conn.ConnectionString = Provider=SQLNCLI;Server=10.1.1.2;
Database=csrctest;Uid=bill;Pwd=bill
print Conn.ConnectionString
try:
print 'trying to open'
Conn.Open()
etc.
All I ever get to is the trying to openline, then it times out.
I have tried all of the following combinations too:
Provider=SQLNCLI;Server=localhost;Database=csrctest;Uid=bill;Pwd=bill;
Provider=SQLNCLI;Server=localhost\SQLEXPRESS;Database=csrctest;Uid=bill;Pwd=bill;
The SQLEXPRESS database for testing purposes is on my home PC
[10.1.1.2]
Any clues s to where I am going wrong?
Look forward to hearing from someone, anyone!!
Kind regards
Bill
You might try pymssql:
http://pymssql.sourceforge.net/
I've only used it with MSSQL2000, but according to the website, it
should work with 2005 too.
If you wrapped your database interface with SQLObject or SQLAlchemy,
then (as I understand it) the sql connector module can be swapped out
with little to no work. I hope to move to one of those sooner or
later:
http://www.sqlobject.org/
http://www.sqlalchemy.org/
Mike
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Re: Using ctypes with lib not found via ldconfig
On 20 Dec 2007 20:36:20 GMT, Cylops [EMAIL PROTECTED] wrote: I'd like to use ctypes for my Linux app, but the libraries i want to use it on aren't in a standard location, and can't be found via ldconfig. They aren't in any of the directories listed in /etc/ld.so.conf, and they won't be. Our IT dept. controls this, and won't make them normally accessible for me. So, how do i steer ctypes towards these libs? Let's say this is one of them: /home/me/otherLibs/libgaak.so.6 This generally works by setting the LD_LIBRARY_PATH environment variable. Jean-Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Hexadecimal list conversion
En Thu, 20 Dec 2007 12:51:33 -0300, Peter Otten [EMAIL PROTECTED] escribió: Mark T wrote: Gabriel Genellina [EMAIL PROTECTED] wrote in message If you got that from a file, I bet you read it using the wrong encoding. Try opening the file using codecs.open(filename, rb, encoding=utf-16-be) instead of plain open. There is an odd number of bytes in each string. Each begins and ends with \x00, so it doesn't look like utf-16-be. I think Gabriel is right. The OP probably butchered the original structure with open(filename).read().split(\n) Sure! I take bets on this too. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
wxPython FileDialog, select folder
How can i select folder either with wx.FileDialog or with any other. I managed to fine only how to open files but I need to select folder to get files from all sub folders. Thanks in advance! -- http://mail.python.org/mailman/listinfo/python-list
Is this a bug in int()?
int('0x', 16)
0
I'm working on a tokenizer and I'm thinking about returning a
MALFORMED_NUMBER token (1.2E, .5E+)
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Re: wxPython FileDialog, select folder
On Dec 20, 2007 3:19 PM, SMALLp [EMAIL PROTECTED] wrote: How can i select folder either with wx.FileDialog or with any other. I managed to fine only how to open files but I need to select folder to get files from all sub folders. There's a separate dialog, wx.DirDialog. -- http://mail.python.org/mailman/listinfo/python-list
Need to open an Url and display it in a window created using Python win extensions
I'm pretty new to Python and I've been searching all over the place to find a solution for this. I have a html page with some javascript in it and I need to load this page in my own window (which I will create using PythonWin). The reason for this is to have capability to control the window properties and at the same time have access to click on the submit buttons in the webpage.e So basically, I will open a wepage as shown below - import win32com.client import win32api import win32gui ie = win32com.client.Dispatch( InternetExplorer.Application ) ie.Visible = 1 ie.Navigate(http://www.microsoft.com/;) And then I need to display it in a window that I will create as shown below - hwnd = CreateWindowEx(...) I will be so grateful if anyone can give me some pointers on how to go about this. Thank you for reading -- http://mail.python.org/mailman/listinfo/python-list
Re: Using ctypes with lib not found via ldconfig
Hello, May be I misunderstand your problem, but is it not possible do link it as follow? import ctypes libgaak = ctypes.CDLL(/home/me/otherLibs/libgaak.so.6) Kind regards. Sam -- http://mail.python.org/mailman/listinfo/python-list
Re: Passing by reference
[EMAIL PROTECTED] wrote: ... the first element of the list to which x refers is a reference to the new string and back outside foo, the first element of the list to which x refers will be a reference to the new string. I'd rephrase that as: * Both the global context and the inside of foo see the same list * They can therefore both update the list * If a new string is put in the first element of the list, the can both see the same new string. Right? You know you can get python to answer your question - yes? Might be slightly more illuminating than twisting round english... :-) OK, you're passing in a string in a list. You have 2 obvious ways of doing that - either as an argument: def foo(y): y[0] += other print id(y[0]) ... or as a global: (which of course you wouldn't do :-) def bar(): global x x[0] += another print id(x[0]) So let's see what happens. x = [some string] # create container with string x[0] # Check that looks good it does 'some string' id(x[0]) # What's the id of that string?? 3082578144L foo(x)# OK, foo thinks the new string has the following id 3082534160 x[0] # Yep, our x[0] has updated, as expected. 'some string other' id(x[0]) # Not only that the string has the same id. 3082534160L bar() # Update the global var, next line is new id 3082543416 x[0] # Check the value's updated as expected 'some string other another' id(x[0]) # Note that the id is the same as the output from bar 3082543416L Does that perhaps answer your question more precisely ? Michael. -- http://mail.python.org/mailman/listinfo/python-list
RE: xml-filter with XMLFilterBase() and XMLGenerator() shuffles attributes
I want prevent it from shuffling attributes, i.e. preserve original file's attribute order. Is there any ContentHandler.features* responsible for that? I suspect not. attrs is a dictionary which does not maintain order, and XML attributes are unordered to begin with. Is there any reason other than aesthetics that you want the order preserved? It shouldn't matter to any upstream consumer of the filtered XML. I had the same requirements. I also had the requirement to preserve namespace prefixes. Luckily, for my application I was able to use the XML_STRING property to handle my requirements. Otherwise, if you drop down to using PyExpat (not SAX) then you can do what you want. If you want to keep using SAX, then you need to use a non-default Python SAX implementation or use one of the Java SAX parsers that have this option. BTW, I have never been able to get XMLGenerator to work; it seems really buggy regarding namespaces. I had to write my own version of it. - Brian -- http://mail.python.org/mailman/listinfo/python-list
Re: Is this a bug in int()?
[EMAIL PROTECTED] wrote under the subject line Is this a
bug in int()?:
int('0x', 16)
0
I think it is a general problem in the tokenizer, not just the 'int'
constructor. The syntax for integers says:
hexinteger ::= 0 (x | X) hexdigit+
but 0x appears to be accepted in source code as an integer.
If I were you, I'd try reporting it as a bug.
I'm working on a tokenizer and I'm thinking about returning a
MALFORMED_NUMBER token (1.2E, .5E+)
Why would you return a token rather than throwing an exception?
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Re: Connecting to SQL database
On Dec 20, 10:01 pm, bill ramsay [EMAIL PROTECTED] wrote: On Fri, 14 Dec 2007 23:35:00 -0300, Gabriel Genellina [EMAIL PROTECTED] wrote: En Fri, 14 Dec 2007 23:24:24 -0300, Unknown [EMAIL PROTECTED] escribió: I have successfully connected to SQL2000 and MSDEE databases in the past, however I have to move to SQL2005 and SQLEXPRESS databases now. Conn.ConnectionString = Provider=SQLNCLI;Server=10.1.1.2; Database=csrctest;Uid=bill;Pwd=bill Look for the right spelling athttp://www.connectionstrings.com/ looks like my spelling is ok, any other ideas? thanks for the suggestion above. kind regards bill This is working for me to the internal network (I'm using adodbapi, but the connection string should be the same) 'Provider=sqloledb;Data Source=dbserv;Initial Catalog=ndb;User Id=foo;Password=bar;' I just tested, and this works well too 'Provider=SQLNCLI;Data Source=dbserv;Initial Catalog=ndb;User Id=foo;Password=bar;' and to my local instance (Hermes is my machine) 'Provider=SQLNCLI;Data Source=HERMES\\SQLEXPRESS;Initial Catalog=;User Id=sa;Password=pw666;' Can you connect to the server using SqlServer Management Studio? Can you create an odbc connection to the server? Unlike 2000, SqlServer 2005 has tcp/ip connections turned off by default, so you might want to check that with the SqlServer Surface Area Configuration tool. Externally we're still running 2000, so I don't know how connecting over the interweb differs. When you've figured out how to connect, and if you're open to a suggestion, you might want to try out the adodbapi package (http:// adodbapi.sourceforge.net/). It is a thin wrapper over ADO, and works quite well. Then you'll get to use the Python db-api v.2.0 syntax, which is oodles less typing than straight ADO. -- bjorn -- http://mail.python.org/mailman/listinfo/python-list
