ANN: pyc -- python compiler in python
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REMINDER: SoCal Piggies: October 13, 7 PM at USC
The Southern California Python Interest Group will meet on October 13 at 7 PM at USC. Directions are available at http://socal-piggies.org/scp/USC_Salvatori_Computer_Science_Center,_room_222 (note that there is a room change: this time we'll meet in room 322 and not 222). The theme for the meeting is Python graphics and visualization. Presentations: PIL tutorial -- Brian Leair matplotlib overview -- Diane Trout Creating sparklines with matplotlib -- Grig Gheorghiu Please consider joining us if you are in the area. For more details on SoCal Piggies activities, see the group's home page at http://socal-piggies.org/scp. Grig -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Re: TurboGears /.-ed, new == True or new == True
Andy Leszczynski enlightened us with: should not it be: 2 def save(self, pagename, data, submit, new): 3 hub.begin() 4 if new == True: 5 page = Page(pagename=pagename, data=data) 6 else: 7 page = Page.byPagename(pagename) 8 page.data = data instead of: 4 if new == True: No it should not. The values passed to the function are the strings passed by the GET request, hence all strings. There are methods of dealing with this - read the rest of the documentation. Sybren -- The problem with the world is stupidity. Not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself? Frank Zappa -- http://mail.python.org/mailman/listinfo/python-list
Re: bizarro world (was Re: Python Doc Problem Example: sort() (reprise))
mr. xah... would you be willing to give a lecture at pycon 2006? i'm sure you would draw a huge crowd and a lot of people would like to meet you in person... thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: piping out binaries properly
Erik Max Francis [EMAIL PROTECTED] writes: I've written lots of things whose standard out was designed specifically to be read by another program, but never as binary data. Plenty of applications use that functionality and depend on it. See cjpeg, djpeg, the pbmplus library, and so forth. Also tar cf files... | compress tarball.Z used to be a standard idiom, now replaced by tar cfz ... which does about the same thing under the covers. -- http://mail.python.org/mailman/listinfo/python-list
Re: bizarro world (was Re: Python Doc Problem Example: sort() (reprise))
Bryan wrote: mr. xah... would you be willing to give a lecture at pycon 2006? i'm sure you would draw a huge crowd and a lot of people would like to meet you in person... thanks. I think that would be a highly un-pythonesque crowd. Python isn't much in the sense of limitations, but that crowd probably needs to be limited in one way or another, like only 2 rotten fruits per person or similar. -- Lasse Vågsæther Karlsen http://usinglvkblog.blogspot.com/ mailto:[EMAIL PROTECTED] PGP KeyID: 0x2A42A1C2 -- http://mail.python.org/mailman/listinfo/python-list
Adding a __filename__ predefined attribute to 2.5?
Is it an idea to include a new __filename__ predefined attribute to 2.5, so that __file__ contains the entire path to the module, and __filename__ only the name of the module? For instance it's useful to include a not-static reference to the filename in a scripts usage() section and it's cumbersome to extract the filename or to do module imports just to parse it. -- http://mail.python.org/mailman/listinfo/python-list
Re: piping out binaries properly
Andy Leszczynski wrote: when I run under Unix I got: $ python u.py u.bin $ od -t x1 u.bin 000 41 41 0a 41 41 and under Windows/Cygwin following: $ python u.py u.bin $ od -t x1 u.bin 000 41 41 0d 0a 41 41 006 The question is how can I pipe out binary content properly and platform independently? $ python -h usage: python [option] ... [-c cmd | file | -] [arg] ... Options and arguments (and corresponding environment variables): ... -u : unbuffered binary stdout and stderr (also PYTHONUNBUFFERED=x) ... /F -- http://mail.python.org/mailman/listinfo/python-list
Re: HELP: Searching File Manager written in Python
To answer to you both: The Norton Commander was a popular file manager for DOS, but the idea of the 2 window concept is still used by a lot of software. On Linux the one I use is Midnight Commander (mc). On Windows there are the 7-zip file manager see http://www.7-zip.org/ (7-zip is also a new compression format which is very good, there exist also a linux command line version) - Speed Commander is also a Windows filemanager. - Atol is based on GTK runs on Linux and Windows (http://atol.sourceforge.net/) but is not written in python or cannot run commands (I also get always error messages at startup that some drives are missing, perhaps my cdrom or my zip drive, but this happens with Gimp too - so I believe GTK is the problem) But actually I work on Windows, thats why I am searching something which works on windows or better on Windows and Linux Perhaps some Python+wxWindows Application would be best. There exist a port of Atol to python+wxPython on: http://sourceforge.net/projects/wxpyatol But the project is stopped and abandonware ... Thanks a lot for now :-) I will have a look on your suggestions. Stephane -- http://mail.python.org/mailman/listinfo/python-list
Re: A problem while using urllib
Johnny Lee wrote: Alex Martelli wrote: Johnny Lee [EMAIL PROTECTED] wrote: ... try: webPage = urllib2.urlopen(url) except urllib2.URLError: ... webPage.close() return True But every time when I ran to the 70 to 75 urls (that means 70-75 urls have been tested via this way), the program will crash and all the urls left will raise urllib2.URLError until the program exits. I tried many ways to work it out, using urllib, set a sleep(1) in the filter (I thought it was the massive urls crashed the program). But none works. BTW, if I set the url from which the program crashed to base url, the program will still crashed at the 70-75 url. How can I solve this problem? thanks for your help Sure looks like a resource leak somewhere (probably leaving a file open until your program hits some wall of maximum simultaneously open files), but I can't reproduce it here (MacOSX, tried both Python 2.3.5 and 2.4.1). What version of Python are you using, and on what platform? Maybe a simple Python upgrade might fix your problem... Alex Thanks for the info you provided. I'm using 2.4.1 on cygwin of WinXP. If you want to reproduce the problem, I can send the source to you. This morning I found that this is caused by urllib2. When I use urllib instead of urllib2, it won't crash any more. But the matters is that I want to catch the HTTP 404 Error which is handled by FancyURLopener in urllib.open(). So I can't catch it. I'm using exactly that configuration, so if you let me have that source I could take a look at it for you. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: List performance and CSV
[EMAIL PROTECTED] wrote: But a really fast approach is to use a dictionary or other structure that turns the inner loop into a fast lookup, not a slow loop through the 'Customers' list. Another approach is to sort both sequences, loop over both in one loop and just update the index for the smaller item. Something like this (below, I'm assuming no duplicates in the lists, and I don't know if that's true for your [2]): l1 = (1,2,4,6,7,8,9) l2 = (2,5,6,7,9,10) i1 = i2 = 0 while 1: ... if l1[i1]==l2[i2]: ... print l1[i1], 'is in both' ... i1 += 1; i2 += 1 ... elif l1[i1]l2[i2]: ... i1 += 1 ... else: ... i2 += 1 ... 2 is in both 6 is in both 7 is in both 9 is in both Traceback (most recent call last): File stdin, line 2, in ? IndexError: tuple index out of range Unless I'm terribly confused, this will lead to m+n iterations in the worst case. (Of course, the sort operations are something like O(n log n) I guess.) By the way, you might be able to use sets too: How fast is Set.intersection? -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: Phases of the moon
Ulrich Hobelmann wrote: Paul F. Dietz wrote: Bart Lateur wrote: As a similar example: I've been told by various women independently, that there are more babies born near a full moon. That's also a myth. Right, everybody knows that it's not natural (moon) light that influences reproductive behavior, it's artificial light -- TV. When TV is turned off by a power failure, lots of people that usually never have sex start making love, and lots of people that usually use contraception lose their minds and forget about it. 9 months later more babies are born, unless that's also a myth. But the myth in question is babies being *born* under natural or artificial light. Not being conceived. Cheers, Brandon J. Van Every (cruise (director (of SeaFunc) '(Seattle Functional Programmers))) http://groups.yahoo.com/group/SeaFunc -- http://mail.python.org/mailman/listinfo/python-list
Re: can we save print msg into a file when script running ?
black wrote: hi all~ in my .py file there are a few print to trace out some message and i wonder if we can save it into a specified file when that script get running. if so, i may just check that file to c how the script is running. can anyone show me a right direction ? one million tks~ On Unix platforms you can run your script with a redirection of the standard output: python myscript.py somefile.txt [The ampersand runs the command in the background]. Then you can monitor the content of the output file with tail -f somefile.txt which will show you the last part of the file and further additions as long as you let the tail command run. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: can we save print msg into a file when script running ?
black wrote: hi all~ in my .py file there are a few print to trace out some message and i wonder if we can save it into a specified file when that script get running. if so, i may just check that file to c how the script is running. can anyone show me a right direction ? one million tks~ script.py script.log 21 -- Best regards, Maksim Kasimov mailto: [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: Adding a __filename__ predefined attribute to 2.5?
Rune Strand wrote: Is it an idea to include a new __filename__ predefined attribute to 2.5, so that __file__ contains the entire path to the module, and __filename__ only the name of the module? For instance it's useful to include a not-static reference to the filename in a scripts usage() section and it's cumbersome to extract the filename or to do module imports just to parse it. No. It's not usually a good idea to remove complexity from your program by adding it (where most of the time it's not needed) to the underlying system. Here's a clue as to how you might do without __file__ altogether: [EMAIL PROTECTED] ~/Projects/Python $ cat test78.py import sys print sys.argv [EMAIL PROTECTED] ~/Projects/Python $ python test78.py can we say live with it? ['test78.py', 'can', 'we', 'say', 'live', 'with', 'it?'] regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: A problem while using urllib
Steve Holden wrote: Johnny Lee wrote: Alex Martelli wrote: Johnny Lee [EMAIL PROTECTED] wrote: ... try: webPage = urllib2.urlopen(url) except urllib2.URLError: ... webPage.close() return True But every time when I ran to the 70 to 75 urls (that means 70-75 urls have been tested via this way), the program will crash and all the urls left will raise urllib2.URLError until the program exits. I tried many ways to work it out, using urllib, set a sleep(1) in the filter (I thought it was the massive urls crashed the program). But none works. BTW, if I set the url from which the program crashed to base url, the program will still crashed at the 70-75 url. How can I solve this problem? thanks for your help Sure looks like a resource leak somewhere (probably leaving a file open until your program hits some wall of maximum simultaneously open files), but I can't reproduce it here (MacOSX, tried both Python 2.3.5 and 2.4.1). What version of Python are you using, and on what platform? Maybe a simple Python upgrade might fix your problem... Alex Thanks for the info you provided. I'm using 2.4.1 on cygwin of WinXP. If you want to reproduce the problem, I can send the source to you. This morning I found that this is caused by urllib2. When I use urllib instead of urllib2, it won't crash any more. But the matters is that I want to catch the HTTP 404 Error which is handled by FancyURLopener in urllib.open(). So I can't catch it. I'm using exactly that configuration, so if you let me have that source I could take a look at it for you. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ I've sent the source, thanks for your help. Regrads, Johnny -- http://mail.python.org/mailman/listinfo/python-list
Re: HELP: Searching File Manager written in Python
Checked Total Commander? Has an sort of open API to plugins, and either do a python 'proxy' or maybe just execute a script. Next step might be using win32com or SWIG to set up the interface.. Just some ideas. /Andy -- Everything that was magical was just a way of describing the world in words it couldn't ignore. - Pyramids by Terry Pratchett -- http://mail.python.org/mailman/listinfo/python-list
Re: Adding a __filename__ predefined attribute to 2.5?
I Steve,
I know it's several ways to isolate the filename. I just want to avoid
the overhead of importing sys or os to achieve it.
Currently I have this in my scripts:
__filename__ = __file__.replace('\\', '/').rsplit('/', 1)[-1]
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Re: A problem while using urllib
Johnny Lee wrote: Steve Holden wrote: Johnny Lee wrote: Alex Martelli wrote: Johnny Lee [EMAIL PROTECTED] wrote: ... try: webPage = urllib2.urlopen(url) except urllib2.URLError: ... webPage.close() return True But every time when I ran to the 70 to 75 urls (that means 70-75 urls have been tested via this way), the program will crash and all the urls left will raise urllib2.URLError until the program exits. I tried many ways to work it out, using urllib, set a sleep(1) in the filter (I thought it was the massive urls crashed the program). But none works. BTW, if I set the url from which the program crashed to base url, the program will still crashed at the 70-75 url. How can I solve this problem? thanks for your help Sure looks like a resource leak somewhere (probably leaving a file open until your program hits some wall of maximum simultaneously open files), but I can't reproduce it here (MacOSX, tried both Python 2.3.5 and 2.4.1). What version of Python are you using, and on what platform? Maybe a simple Python upgrade might fix your problem... Alex Thanks for the info you provided. I'm using 2.4.1 on cygwin of WinXP. If you want to reproduce the problem, I can send the source to you. This morning I found that this is caused by urllib2. When I use urllib instead of urllib2, it won't crash any more. But the matters is that I want to catch the HTTP 404 Error which is handled by FancyURLopener in urllib.open(). So I can't catch it. I'm using exactly that configuration, so if you let me have that source I could take a look at it for you. [...] I've sent the source, thanks for your help. [...] Preliminary result, in case this rings bells with people who use urllib2 quite a lot. I modified the error case to report the actual message returned with the exception and I'm seeing things like: http://www.holdenweb.com/./Python/webframeworks.html Message: urlopen error (120, 'Operation already in progress') Start process http://www.amazon.com/exec/obidos/ASIN/0596001886/steveholden-20 Error: IOError while parsing http://www.amazon.com/exec/obidos/ASIN/0596001886/steveholden-20 Message: urlopen error (120, 'Operation already in progress') . . . So at least we know now what the error is, and it looks like some sort of resource limit (though why only on Cygwin betas me) ... anyone, before I start some serious debugging? regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Adding a __filename__ predefined attribute to 2.5?
on 12.10.2005 10:02 Diez B. Roggisch said the following:
Rune Strand wrote:
Currently I have this in my scripts:
__filename__ = __file__.replace('\\', '/').rsplit('/', 1)[-1]
This is neither platform independent nor less overhead. This is:
import os
__filname__ = os.path.split(__file__)[-1]
I would say that::
import os
filename = os.path.basename(__file__)
is even more explicit.
And with one of the several existing 'path' modules it would be::
from path import path
filename = path(__file__).basename
I am sorry if I missed this on this list,
but was there a decision on the idea of including an object-oriented
path class in the standard library?
cheers,
stefan
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Re: Python's Performance
Alex Stapleton wrote:
On 9 Oct 2005, at 19:04, Bruno Desthuilliers wrote:
Laszlo Zsolt Nagy a écrit :
(snip)
Do you want to know how many internal string operations are done inside
the Python interpreter? I believe it is not a useful information. There
are benchmarks testing the *real performance* of Python.
For example: http://www.osnews.com/story.php?news_id=5602
A benchmark stating that Python is interpreted is bullshit.
Except it is interpreted. What is your point?
Nope. It's byte-compiled, just like Java. What do you think those .pyc
files are exactly ?
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
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Re: Python's Performance
Donn Cave wrote:
Quoth Fredrik Lundh [EMAIL PROTECTED]:
| Alex Stapleton wrote
|
| Except it is interpreted.
|
| except that it isn't. Python source code is compiled to byte code, which
| is then executed by a virtual machine. if the byte code for a module is up
| to date, the Python runtime doesn't even look at the source code.
Fair to say that byte code is interpreted? Seems to require an
application we commonly call an interpreter.
If so, Java is interpreted too. The only difference between Java and
Python here is that Python is smart enough to call the compiler by itself.
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
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Re: Why asci-only symbols?
Mike Meyer wrote: Out of random curiosity, is there a PEP/thread/? that explains why Python symbols are restricted to 7-bit ascii? No PEP yet; I meant to write one for several years now. The principles would be - sources must use encoding declarations - valid identifiers would follow the Unicode consortium guidelines, in particular: identifiers would be normalized in NFKC (I think), adjusted in the ASCII range for backward compatibility (i.e. not introducing any additional ASCII characters as legal identifier characters) - __dict__ will contain Unicode keys - all objects should support Unicode getattr/setattr (potentially raising AttributeError, of course) - open issue: what to do on the C API (perhaps nothing, perhaps allowing UTF-8) Regards, Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: A problem while using urllib
Steve Holden wrote: Johnny Lee wrote: [...] I've sent the source, thanks for your help. [...] Preliminary result, in case this rings bells with people who use urllib2 quite a lot. I modified the error case to report the actual message returned with the exception and I'm seeing things like: http://www.holdenweb.com/./Python/webframeworks.html Message: urlopen error (120, 'Operation already in progress') Start process http://www.amazon.com/exec/obidos/ASIN/0596001886/steveholden-20 Error: IOError while parsing http://www.amazon.com/exec/obidos/ASIN/0596001886/steveholden-20 Message: urlopen error (120, 'Operation already in progress') . . . So at least we know now what the error is, and it looks like some sort of resource limit (though why only on Cygwin betas me) ... anyone, before I start some serious debugging? I realized after this post that WingIDE doesn't run under Cygwin, so I modified the code further to raise an error and give us a proper traceback. I also tested the program under the standard Windows 2.4.1 release, where it didn't fail, so I conclude you have unearthed a Cygwin socket bug. Here's the traceback: End process http://www.holdenweb.com/contact.html Start process http://freshmeat.net/releases/192449 Error: IOError while parsing http://freshmeat.net/releases/192449 Message: urlopen error (120, 'Operation already in progress') Traceback (most recent call last): File Spider_bug.py, line 225, in ? spider.run() File Spider_bug.py, line 143, in run self.grabUrl(tempUrl) File Spider_bug.py, line 166, in grabUrl webPage = urllib2.urlopen(url).read() File /usr/lib/python2.4/urllib2.py, line 130, in urlopen return _opener.open(url, data) File /usr/lib/python2.4/urllib2.py, line 358, in open response = self._open(req, data) File /usr/lib/python2.4/urllib2.py, line 376, in _open '_open', req) File /usr/lib/python2.4/urllib2.py, line 337, in _call_chain result = func(*args) File /usr/lib/python2.4/urllib2.py, line 1021, in http_open return self.do_open(httplib.HTTPConnection, req) File /usr/lib/python2.4/urllib2.py, line 996, in do_open raise URLError(err) urllib2.URLError: urlopen error (120, 'Operation already in progress') Looking at that part of the course of urrllib2 we see: headers[Connection] = close try: h.request(req.get_method(), req.get_selector(), req.data, headers) r = h.getresponse() except socket.error, err: # XXX what error? raise URLError(err) So my conclusion is that there's something in the Cygwin socket module that causes problems not seen under other platforms. I couldn't find any obviously-related error in the Python bug tracker, and I have copied this message to the Cygwin list in case someone there knows what the problem is. Before making any kind of bug submission you should really see if you can build a program shorter that the existing 220+ lines to demonstrate the bug, but it does look to me like your program should work (as indeed it does on other platforms). regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
crosswords helper program
I plan to write a program in Python in order to help me doing crosswords, I was wondering if such a program already existed. Basically it will get the number of letters of the word (5, 10, 12...) then the letters known (B in second letter, E in 5th letter...) and then search in a dictionary the words matching this criteria Regards Gerard -- http://mail.python.org/mailman/listinfo/python-list
Re: Nicer way of strip and replace?
On 2005-10-12 01:29:28 +0200, Paul Rubin http://[EMAIL PROTECTED] said: Oh cool. I think you could even say: rechnung = list(read_file) instead of the for loop. Yes, that is working too. -- http://mail.python.org/mailman/listinfo/python-list
Re: Adding a __filename__ predefined attribute to 2.5?
Excuse me, do you suffer from a bad hair-day? I didn't say it is platform independant. It's ok for my use on Linux and Windows. If you cannot imagine any other usecase for a __filename__ attribute, that's your problem, not mine. -- http://mail.python.org/mailman/listinfo/python-list
Re: Jargons of Info Tech industry
Steven D'Aprano [EMAIL PROTECTED] writes: On Tue, 11 Oct 2005 14:27:30 +, axel wrote: I don't know how much spam other people receive but on one account I hardly receive any as I reserve it for friends and business. On another I had about 40 spam messages which took all of ten seconds to delete. Hardly a serious matter. Can I remind you that spam is approximately 70% of all email traffic these days? Most of that is blocked by the ISPs, but even so you are obviously one of the lucky few. 95% - 99% of all email, not 70% (just ask your ISP). A large percentage of the cost of email is the cost of getting rid of SPAM; and that cannot happen without colleteral damage in the form of lost valid email, not just because of improper filtering but also because the more layers are there to touch the email the bigger the chances that it does not arrive. My work email address, on the other hand, is another story. We run a two layer defence: blocking blacklisted addresses at our mail server, and spam assassin at the individual user level. Even with that, I get about 100 spams a day delivered into my inbox, although many of those are addressed to generic email addresses which are automatically forwarded to me. Same here: Sun probably tosses 99% of the email directed at me, yet I get well over 100 spams/day. Casper -- Expressed in this posting are my opinions. They are in no way related to opinions held by my employer, Sun Microsystems. Statements on Sun products included here are not gospel and may be fiction rather than truth. -- http://mail.python.org/mailman/listinfo/python-list
Re: Adding a __filename__ predefined attribute to 2.5?
Rune Strand wrote:
I know it's several ways to isolate the filename. I just want to avoid
the overhead of importing sys or os to achieve it.
those modules are already imported when Python gets to your code, so
the only overhead you're saving is a little typing.
Currently I have this in my scripts:
__filename__ = __file__.replace('\\', '/').rsplit('/', 1)[-1]
wow. that's one lousy optimization...
here's a *shorter* piece of code, which is also readable and portable, and
a lot easier to type on most keyboards:
import os
__filename__ = os.path.basename(__file__)
/F
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Re: crosswords helper program
gg wrote: I plan to write a program in Python in order to help me doing crosswords, I was wondering if such a program already existed. Basically it will get the number of letters of the word (5, 10, 12...) then the letters known (B in second letter, E in 5th letter...) and then search in a dictionary the words matching this criteria Regards Gerard Pretty straightforward with a regular expression: import re words = [BULLETIN, BALLPARK, BUSINESS] r = re.compile(^BU..N..S$, re.IGNORECASE) for word in words: if r.match(word): print word You would probably want to allow the user to input both some basic format for your program and convert it to a regular expression as well as input a full pattern, because then the user can have words that have a U or a E in the second letter, simply because he doesn't know which one is right yet. -- Lasse Vågsæther Karlsen http://usinglvkblog.blogspot.com/ mailto:[EMAIL PROTECTED] PGP KeyID: 0x2A42A1C2 -- http://mail.python.org/mailman/listinfo/python-list
mod_python mptest.py works publisher not
I'm going to work with mod_python.
I install mod_python 3.2.2b for python 2.4.
If i test my install with
mptest.py
see this link:
http://www.modpython.org/live/mod_python-3.2.2b/doc-html/modpython.html
IT WORKS!
But if i try this:
Directory C:\...
AddHandler mod_python .py
PythonHandler mod_python.publisher
PythonDebug On
/Directory
http://www.modpython.org/live/mod_python-3.2.2b/doc-html/tut-pub.html
It don't work!
I Get the following message:
Mod_python error: PythonHandler mod_python.publisher
Traceback (most recent call last):
File C:\Program
Files\Python24\Lib\site-packages\mod_python\apache.py, line 299, in
HandlerDispatch
result = object(req)
File C:\Program
Files\Python24\Lib\site-packages\mod_python\publisher.py, line 204, in
handler
module = page_cache[req]
File C:\Program
Files\Python24\Lib\site-packages\mod_python\cache.py, line 77, in
__getitem__
return self._checkitem(name)[2]
File C:\Program
Files\Python24\Lib\site-packages\mod_python\cache.py, line 119, in
_checkitem
value = self.build(key, name, opened, entry)
File C:\Program
Files\Python24\Lib\site-packages\mod_python\publisher.py, line 77, in
build
return ModuleCache.build(self, key, req, opened, entry)
File C:\Program
Files\Python24\Lib\site-packages\mod_python\cache.py, line 367, in
build
module = new.module(re_not_word.sub('_',key))
AttributeError: 'module' object has no attribute 'module'
HELP?
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another error in tagging program
hello all
i have run the following code :# the taggerI interfacefrom nltk.tagger import *from nltk.tokenizer import WhitespaceTokenizerfrom nltk.tokenizer import *from nltk.token import *
# Using UnigramTagger##Before aUnigramTagger can be used to tag data ,it must be trained on training corpus,# it uses this corpus to determine which tags are most common for each word . UnigramTaggers# are trained using the train method which takes a tagged corpus:# tag2.txt is a tagged trainning corpustagged_txt_str=open('tag2.txt').read()tagged_txt_token=Token(TEXT=tagged_txt_str)WhitespaceTokenizer().tokenize(tagged_txt_token)#TaggedTokenizer().tokenize(tagged_txt_token)#Tagger().tokenize(tagged_txt_token)tagger=UnigramTagger()tagger.train(tagged_txt_token)
and got the following error :
Traceback (most recent call last): File "F:\MSC first Chapters\error correct.py", line 19, in -toplevel- tagger.train(tagged_txt_token) File "C:\Python24\Lib\site-packages\nltk\tagger\__init__.py", line 332, in train tag = subtok[TAG]KeyError: 'TAG'
please help
thanks
enas
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Re: [Info] PEP 308 accepted - new conditional expressions
Sebastian == Sebastian Bassi [EMAIL PROTECTED] writes: Sebastian On 9/30/05, Reinhold Birkenfeld [EMAIL PROTECTED] wrote: after Guido's pronouncement yesterday, in one of the next versions of Python there will be a conditional expression with the following syntax: X if C else Y Sebastian I don't understand why there is a new expression, if Sebastian this could be accomplished with: Sebastian if C: X else: Y Sebastian What is the advantage with the new expression? One very frequent use case is building a string. Instead of: if X==0: filler=yes else: filler=no return the answer is %s % filler What I really want to do is take four lines of conditional, and put them into one, as well as blow off dealing with a 'filler' variable: return the answer is + yes if X==0 else no Or whatever the final release syntax is. Conditional expressions are a nice way to shim something in place, on an acute basis. Chronic use of them could lead to a full-on plate of spaghetti, where you really wanted code. They can be impenitrable. Whenever I'm dealing with them in C/C++, I always line the ?, the :, and the ; characters vertically, which may seem a bit excessive in terms of whitespace, but provides a nice hieroglyph over on the right side of the screen, to make things obvious. Best, Chris -- http://mail.python.org/mailman/listinfo/python-list
wrapping single classes in an extension module
Hi! In a project, I'm providing an API that is made up by augmenting XML DOM elements with tag specific attributes and methods. These actually operate on the DOM and fulfill the need of making the DOM API more user friendly and domain specific. I currently use PyXML/4DOM and I'm considering moving the project to a different package of XML tools that (in addition to XPath) supports RelaxNG, XSLT, etc. out-of-the-box. My preferred candidate would be lxml (based on libxml2, which supports basically all XML standards), but it is backed by classes written in C, which effectively prohibits my current approach of sticking methods into objects generated by the parser API (the __slots__ problem). I guess I'd have to go for a more general wrapper for the XML API that /replaces/ the respective objects (Elements) by my own subclasses whereever they may occurr, i.e. as return values of various functions, as content of containers that are being passed around, etc. This looks like a lot of work to me... Therefore my question: Can anyone imagine a simpler way of approaching this problem? My main interest is to extend the API of XML handling by my domain specific one to make usable through the same objects. Thanks in advance, Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: Need a spider library
Laszlo Zsolt Nagy wrote: The question: is there a good library for Python for extraction links and images out of (possibly malformed) HTML soucre code? http://www.crummy.com/software/BeautifulSoup/ /F -- http://mail.python.org/mailman/listinfo/python-list
Re: bizarro world
Bryan [EMAIL PROTECTED] (B) wrote: B omg!!! wow!!! after reading this i feel like i just stepped in to some B bizarro world. So why do you have to repeat the whole thing?? I have kill-filed XL, and now you put the message in my face. Please don't react to this drivel. -- Piet van Oostrum [EMAIL PROTECTED] URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4] Private email: [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: Need a spider library
Fredrik Lundh wrote: Laszlo Zsolt Nagy wrote: The question: is there a good library for Python for extraction links and images out of (possibly malformed) HTML soucre code? http://www.crummy.com/software/BeautifulSoup/ Thanks a lot! This is just what I wanted. Why it is not part of the standard Python library yet? :-) -- http://mail.python.org/mailman/listinfo/python-list
A Tree class, my $0.02 contribution to the python community.
Comments are welcome: http://www.pardon-sleeuwaegen.be/antoon/avltree.html -- http://mail.python.org/mailman/listinfo/python-list
Re: how to(can we ?) pass argument to .py script ?
It's quite simple. If this usage example can helps you... ### parser try: opts, args = getopt.getopt(sys.argv[1:], h, e, p:, [help]) mode = 'reply' # default mode pwd = ' ' # default pass (blank) for o, a in opts: if o == '--help' or o == '-h': print helper() os._exit(0) if o == '-h': print helper() os._exit(0) if o == '-e': mode = 'echo/reply' if o == '-p': pwd = a if len(args) 3 : print ERR: Too much few arguments.\n Type %s -h for help. \ %(sys.argv[0]) os._exit(0) if len(args) 3: print \ ERR: Too much arguments.\n Type -h and \ look example to send argumented commands. os._exit(0) except: print ERR: Invalid Option.\n Type %s -h for help. \ %(sys.argv[0]) os._exit(0) ### /parser -- http://mail.python.org/mailman/listinfo/python-list
Re: Need a spider library
Laszlo Zsolt Nagy wrote:
[...]
For example this malformed link:
a href=page.htmlSample link/a
could be converted to:
['page.html','http://samplesite.current_location/page.html','Samle link']
Your options AFAIK are:
* Beautiful Soup (http://www.crummy.com/software/BeautifulSoup/)
* Various implementations of tidy (uTidyLib, mxTidy)
* XIST (http://www.livinglogic.de/Python/xist)
For XIST code that extracts the above info from a HTML page looks like this:
import sys
from ll import url
from ll.xist import parsers
from ll.xist.ns import html
def links(u):
node = parsers.parseURL(u, tidy=True, base=None)
for x in node//html.a:
yield str(x[href]), str(u/str(x[href])), unicode(x)
for data in links(url.URL(sys.argv[1])):
print data
This outputs something like:
('http://www.python.org/', 'http://www.python.org/', u'\r\n')
('http://www.python.org/search/', 'http://www.python.org/search/',
u'Search')
('http://www.python.org/download/', 'http://www.python.org/download/',
u'Download')
('http://www.python.org/doc/', 'http://www.python.org/doc/',
u'Documentation')
...
Hope that helps,
Walter Dörwald
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Re: C Extension - return an array of longs or pointer?
All the veteran programmers out there can correct me, but the way I did
it in my extension was this:
static PyObject *wrap_doNumberStuff(PyObject* self, PyObject* args)
{
char* in = 0;
char* x = 0;
long* result = 0;
int i = 0;
PyObject* py = PyTuple_New()
int ok = PyArg_ParseTuple(args,ss,in, x);
if(!ok) return NULL;
result = doNumberStuff(in,x):
len = sizeof(result)/sizeof(long)
for(i;i len; i++)
PyTuple_SET_ITEM(py, i,Py_BuildValue(l,*result[i])
}
Simple enough idea...i'm not quite sure if I've done everything
correctly with the pointers, but I'm sure you can figure that out, the
algorithm is simple enough.
Hi,
I have been posting about writing a C extension for Python...so far,
so good. At least for the simple functions that I need to wrap.
Ok, my c function looks like...
MY_NUM *doNumberStuff(const char *in, const char *x) { ... }
MY_NUM is defined as, typedef unsigned long MY_NUM; (not sure if that
matters, or can i just create a wrapper which handles longs?)
anyhow..for my wrapper I have this..
static PyObject *wrap_doNumberStuff(PyObject *self, PyObject args) {
char *in = 0;
char *x = 0;
long *result = 0;
int ok = PyArg_ParseTuple(args, ss, in, x);
if (!ok) return 0;
result = doNumberStuff(in, x);
return Py_BuildValue(l, result);
}
...my question is...in the c code, result is a pointer to an array of
longs, how can I get the returned result to be a list or something
similar to an array in Python?
...I also have a function which returns a character array (denoted by a
char *)...would it work the same as the previous question?
Thanks!!
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Re: IDLE dedent/unindent key bindings for non-us keybord?
You could try using the Qscintilla based Eric3 IDE, it uses Ctrl-i and Ctrl-Shift-i. [EMAIL PROTECTED] 10/02/05 5:52 pm |What could be wrong here, and do you have any other suggestions for a |dedent key binding that may work on a non-us/swedish keyboard (or |maybe an alternative editor for python code). | |Thanks. | | -- http://mail.python.org/mailman/listinfo/python-list
Re: C Extension - return an array of longs or pointer?
I'm sorry...I just woke up and forgot my C...must have left it in the
Coffee...Anyway, i made a few mistakes (can't initialize blank
tuple...function should return a value, lol).
static PyObject* wrap_doNumberStuff(PyObject* self, PyObject* args)
{
char* in = 0;
char* x = 0;
long* result = 0;
int i = 0;
PyObject* py = NULL;
if(!PyArg_ParseTuple(args,ss,in,x) return NULL;
result = doNumberStuff(in,x);
len = sizeof(result)/sizeof(long);
py = PyTuple_New(len);
for(i; i len; i++)
PyTuple_SET_ITEM(py, i, Py_BuildValue(l,*result[i]);
return py;
}
Additionally, the Python/C api in the docs tells you all of these nifty
little abstract layer functions that you can call from your extension.
All the veteran programmers out there can correct me, but the way I did
it in my extension was this:
static PyObject *wrap_doNumberStuff(PyObject* self, PyObject* args)
{
char* in = 0;
char* x = 0;
long* result = 0;
int i = 0;
PyObject* py = PyTuple_New()
int ok = PyArg_ParseTuple(args,ss,in, x);
if(!ok) return NULL;
result = doNumberStuff(in,x):
len = sizeof(result)/sizeof(long)
for(i;i len; i++)
PyTuple_SET_ITEM(py, i,Py_BuildValue(l,*result[i])
}
Simple enough idea...i'm not quite sure if I've done everything
correctly with the pointers, but I'm sure you can figure that out, the
algorithm is simple enough.
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C Wrapper Function, crashing Python?
static PyObject *wrap_doStuff(PyObject *self, PyObject *args) {
// this will store the result in a Python object
PyObject *finalResult;
// get arguments from Python
char *result = 0;
char *in= 0;
char *aString = 0;
char *bString = 0;
MY_NUM *a;
MY_NUM *b;
int ok = PyArg_ParseTuple(args, sss, in, aString, bString);
if (!ok) return 0;
// do work to get a and b
// count - returns an int; GetVal - returns a char *
a = GetVal(aString, count(aString, ,));
b = GetVal(bString, count(bString, ,));
// make function call, which returns a char *
result = doStuff(in, a, b);
// save result in Python string
finalResult = PyString_FromString(result);
// free memory
PyMem_Free(result);
PyMem_Free(a);
PyMem_Free(b);
// return the result as a Python string
return finalResult;
}
...from python I can call this function 4 times...works fine. WHen I
call it for the fifth time python.exe crashes. im thinking some memory
problem in the wrapper function perhaps...but I am not sure. The
actually C function, doStuff can be called 5, 6,7...N times without a
problem
so i know its gotta be my wrapper.
Any ideas? Thanks!
--
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Re: C Extension - return an array of longs or pointer?
Interesting...thanks. Any good tutorials out there, other than the
python doc for ext?
thanks.
Brandon K wrote:
All the veteran programmers out there can correct me, but the way I did
it in my extension was this:
static PyObject *wrap_doNumberStuff(PyObject* self, PyObject* args)
{
char* in = 0;
char* x = 0;
long* result = 0;
int i = 0;
PyObject* py = PyTuple_New()
int ok = PyArg_ParseTuple(args,ss,in, x);
if(!ok) return NULL;
result = doNumberStuff(in,x):
len = sizeof(result)/sizeof(long)
for(i;i len; i++)
PyTuple_SET_ITEM(py, i,Py_BuildValue(l,*result[i])
}
Simple enough idea...i'm not quite sure if I've done everything
correctly with the pointers, but I'm sure you can figure that out, the
algorithm is simple enough.
Hi,
I have been posting about writing a C extension for Python...so far,
so good. At least for the simple functions that I need to wrap.
Ok, my c function looks like...
MY_NUM *doNumberStuff(const char *in, const char *x) { ... }
MY_NUM is defined as, typedef unsigned long MY_NUM; (not sure if that
matters, or can i just create a wrapper which handles longs?)
anyhow..for my wrapper I have this..
static PyObject *wrap_doNumberStuff(PyObject *self, PyObject args) {
char *in = 0;
char *x = 0;
long *result = 0;
int ok = PyArg_ParseTuple(args, ss, in, x);
if (!ok) return 0;
result = doNumberStuff(in, x);
return Py_BuildValue(l, result);
}
...my question is...in the c code, result is a pointer to an array of
longs, how can I get the returned result to be a list or something
similar to an array in Python?
...I also have a function which returns a character array (denoted by a
char *)...would it work the same as the previous question?
Thanks!!
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Re: C Wrapper Function, crashing Python?
update:
if I use C's free(result), free(a) free(b) instead of PyMem_Free...I
only get one successfuly use/call of doStuff.
i.e.
// this works
doStuff(...)
// python crashes here
doStuff(...)
Java and Swing wrote:
static PyObject *wrap_doStuff(PyObject *self, PyObject *args) {
// this will store the result in a Python object
PyObject *finalResult;
// get arguments from Python
char *result = 0;
char *in= 0;
char *aString = 0;
char *bString = 0;
MY_NUM *a;
MY_NUM *b;
int ok = PyArg_ParseTuple(args, sss, in, aString, bString);
if (!ok) return 0;
// do work to get a and b
// count - returns an int; GetVal - returns a char *
a = GetVal(aString, count(aString, ,));
b = GetVal(bString, count(bString, ,));
// make function call, which returns a char *
result = doStuff(in, a, b);
// save result in Python string
finalResult = PyString_FromString(result);
// free memory
PyMem_Free(result);
PyMem_Free(a);
PyMem_Free(b);
// return the result as a Python string
return finalResult;
}
...from python I can call this function 4 times...works fine. WHen I
call it for the fifth time python.exe crashes. im thinking some memory
problem in the wrapper function perhaps...but I am not sure. The
actually C function, doStuff can be called 5, 6,7...N times without a
problem
so i know its gotta be my wrapper.
Any ideas? Thanks!
--
http://mail.python.org/mailman/listinfo/python-list
calling matlab
Hi; Does anyone know if we can call matlab for a python or bash script while feeding the matlab script some command line arguments? I have an interactive matlab script which i want to automate by feeding the args from a script. I know this is probably more suitable to a matlab group but any ideas will be appreciated. thanks moe smadi -- http://mail.python.org/mailman/listinfo/python-list
Re: Converting C++ array into Python
try using SWIG? You give very little information about how you are trying to accomplish this. From your mention of C++ you seem to mean a vector, not an array, I suggest you read the documentation of SWIG, and maybe someone can help you if you give a clear example of what you are trying to accomplish, how, and why it fails. Adriaan Renting. Deshdeep, Singh (IE10) [EMAIL PROTECTED] 10/04/05 7:33 am I am extending C++ application with python. I am not able to convert a C++ array in Python. If anyone has the experience of the below :- 1)How to handle the C++ array in the Python code and how to input that from the script ? Awaiting for the solution Regards DD -- http://mail.python.org/mailman/listinfo/python-list
Re: IDLE dedent/unindent key bindings for non-us keybord?
On Wed, 12 Oct 2005 14:58:18 +0200, Adriaan Renting [EMAIL PROTECTED] wrote: You could try using the Qscintilla based Eric3 IDE, it uses Ctrl-i and Ctrl-Shift-i. That is possible. But what has it to do with the original post? Apart from that, in Idle you can bind them it to Ctrl-i and Ctrl-Shift-i also. -- Franz Steinhaeusler -- http://mail.python.org/mailman/listinfo/python-list
Re: C Wrapper Function, crashing Python?
one more update...
if I remove PyMem_Free and free(...) ...so no memory clean up...I can
still only call doStuff 4 times, the 5th attemp crashes Python.
Java and Swing wrote:
update:
if I use C's free(result), free(a) free(b) instead of PyMem_Free...I
only get one successfuly use/call of doStuff.
i.e.
// this works
doStuff(...)
// python crashes here
doStuff(...)
Java and Swing wrote:
static PyObject *wrap_doStuff(PyObject *self, PyObject *args) {
// this will store the result in a Python object
PyObject *finalResult;
// get arguments from Python
char *result = 0;
char *in= 0;
char *aString = 0;
char *bString = 0;
MY_NUM *a;
MY_NUM *b;
int ok = PyArg_ParseTuple(args, sss, in, aString, bString);
if (!ok) return 0;
// do work to get a and b
// count - returns an int; GetVal - returns a char *
a = GetVal(aString, count(aString, ,));
b = GetVal(bString, count(bString, ,));
// make function call, which returns a char *
result = doStuff(in, a, b);
// save result in Python string
finalResult = PyString_FromString(result);
// free memory
PyMem_Free(result);
PyMem_Free(a);
PyMem_Free(b);
// return the result as a Python string
return finalResult;
}
...from python I can call this function 4 times...works fine. WHen I
call it for the fifth time python.exe crashes. im thinking some memory
problem in the wrapper function perhaps...but I am not sure. The
actually C function, doStuff can be called 5, 6,7...N times without a
problem
so i know its gotta be my wrapper.
Any ideas? Thanks!
--
http://mail.python.org/mailman/listinfo/python-list
Re: C Wrapper Function, crashing Python?
Op 2005-10-12, Java and Swing schreef [EMAIL PROTECTED]:
static PyObject *wrap_doStuff(PyObject *self, PyObject *args) {
// this will store the result in a Python object
PyObject *finalResult;
// get arguments from Python
char *result = 0;
char *in= 0;
char *aString = 0;
char *bString = 0;
MY_NUM *a;
MY_NUM *b;
int ok = PyArg_ParseTuple(args, sss, in, aString, bString);
if (!ok) return 0;
// do work to get a and b
// count - returns an int; GetVal - returns a char *
a = GetVal(aString, count(aString, ,));
b = GetVal(bString, count(bString, ,));
// make function call, which returns a char *
result = doStuff(in, a, b);
// save result in Python string
finalResult = PyString_FromString(result);
// free memory
PyMem_Free(result);
PyMem_Free(a);
PyMem_Free(b);
// return the result as a Python string
return finalResult;
}
...from python I can call this function 4 times...works fine. WHen I
call it for the fifth time python.exe crashes. im thinking some memory
problem in the wrapper function perhaps...but I am not sure. The
actually C function, doStuff can be called 5, 6,7...N times without a
problem
so i know its gotta be my wrapper.
Any ideas? Thanks!
Well assuming your doStuff is a C function that knows nothing of python.
it might be the PyMem_Free(result).
http://docs.python.org/api/memoryInterface.html says the following:
void PyMem_Free(void *p)
Frees the memory block pointed to by p, which must have been
returned by a previous call to PyMem_Malloc() or PyMem_Realloc().
Otherwise, or if PyMem_Free(p) has been called before, undefined
behavior occurs. If p is NULL, no operation is performed.
But your result wasn't allocated by a PyMem_Malloc, it was returned
to you by a C function.
--
Antoon Pardon
--
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Re: searching python/gui developper in germany
Hans Georg Krauthaeuser wrote: Dear all, for the measurements in our labs we have developed python scripts that are pretty fine for our needs. Basically, we have classes and call the appropriate methods from the command line (or by other scripts). So, we don't have any GUI. Now, an external customer want to use our software and -- as you can imagine -- we want a pretty GUI. So, we are looking for someone who can develop such a pretty GUI for us (of course for money). OS is Windows (XP). We are not fixed to a special toolkit -- it just should look nice and do the job. Best would be someone from our region (Magdeburg, Germany). If someone is interested: contact me by email, please. Best regards Hans Georg Krauthaeuser http://www.die-offenbachs.de/detlev/eric3.html If you run SuSE9.3 or SuSE 10.0, everything is there. Simply install eric or eric3. There is also a great gui design utility in the installation. You'll be going in no time. malv -- http://mail.python.org/mailman/listinfo/python-list
Re: C Wrapper Function, crashing Python?
Antoon,
I just saw that to. I updated the code like so...
static PyObject *wrap_doStuff(PyObject *self, PyObject *args) {
// this will store the result in a Python object
PyObject *finalResult;
// get arguments from Python
char *result = 0;
char *in= 0;
char *aString = 0;
char *bString = 0;
MY_NUM *a = (MY_NUM *) PyMem_Malloc((20 * sizeof(MY_NUM) + 1); //
the array will be 20 long
MY_NUM *b = (MY_NUM *) PyMem_Malloc((20 * sizeof(MY_NUM) + 1); //
the array will be 20 long
int ok = PyArg_ParseTuple(args, sss, in, aString, bString);
if (!ok) return 0;
// do work to get a and b
// count - returns an int; GetVal - returns a MY_NUM * (a pointer
to a MY_NUM array)
a = GetVal(aString, count(aString, ,));
b = GetVal(bString, count(bString, ,));
// make function call, which returns a char *
result = doStuff(in, a, b);
// save result in Python string
finalResult = PyString_FromString(result);
// free memory
PyMem_Free(a);
PyMem_Free(b);
free(aString);
free(bString);
free(result);
// return the result as a Python string
return finalResult;
}
..as you can see, i malloc'ed memory, and free'd the memory. However,
I still have python crashing (after only 3 successful calls to
doStuff). And yes, doStuff is a plain C function...nothing related to
Python.
Antoon Pardon wrote:
Op 2005-10-12, Java and Swing schreef [EMAIL PROTECTED]:
static PyObject *wrap_doStuff(PyObject *self, PyObject *args) {
// this will store the result in a Python object
PyObject *finalResult;
// get arguments from Python
char *result = 0;
char *in= 0;
char *aString = 0;
char *bString = 0;
MY_NUM *a;
MY_NUM *b;
int ok = PyArg_ParseTuple(args, sss, in, aString, bString);
if (!ok) return 0;
// do work to get a and b
// count - returns an int; GetVal - returns a char *
a = GetVal(aString, count(aString, ,));
b = GetVal(bString, count(bString, ,));
// make function call, which returns a char *
result = doStuff(in, a, b);
// save result in Python string
finalResult = PyString_FromString(result);
// free memory
PyMem_Free(result);
PyMem_Free(a);
PyMem_Free(b);
// return the result as a Python string
return finalResult;
}
...from python I can call this function 4 times...works fine. WHen I
call it for the fifth time python.exe crashes. im thinking some memory
problem in the wrapper function perhaps...but I am not sure. The
actually C function, doStuff can be called 5, 6,7...N times without a
problem
so i know its gotta be my wrapper.
Any ideas? Thanks!
Well assuming your doStuff is a C function that knows nothing of python.
it might be the PyMem_Free(result).
http://docs.python.org/api/memoryInterface.html says the following:
void PyMem_Free(void *p)
Frees the memory block pointed to by p, which must have been
returned by a previous call to PyMem_Malloc() or PyMem_Realloc().
Otherwise, or if PyMem_Free(p) has been called before, undefined
behavior occurs. If p is NULL, no operation is performed.
But your result wasn't allocated by a PyMem_Malloc, it was returned
to you by a C function.
--
Antoon Pardon
--
http://mail.python.org/mailman/listinfo/python-list
Re: C Wrapper Function, crashing Python?
Antoon,
I just saw that to. I updated the code like so...
static PyObject *wrap_doStuff(PyObject *self, PyObject *args) {
// this will store the result in a Python object
PyObject *finalResult;
// get arguments from Python
char *result = 0;
char *in= 0;
char *aString = 0;
char *bString = 0;
MY_NUM *a = (MY_NUM *) PyMem_Malloc((20 * sizeof(MY_NUM) + 1); //
the array will be 20 long
MY_NUM *b = (MY_NUM *) PyMem_Malloc((20 * sizeof(MY_NUM) + 1); //
the array will be 20 long
int ok = PyArg_ParseTuple(args, sss, in, aString, bString);
if (!ok) return 0;
// do work to get a and b
// count - returns an int; GetVal - returns a MY_NUM * (a pointer
to a MY_NUM array)
a = GetVal(aString, count(aString, ,));
b = GetVal(bString, count(bString, ,));
// make function call, which returns a char *
result = doStuff(in, a, b);
// save result in Python string
finalResult = PyString_FromString(result);
// free memory
PyMem_Free(a);
PyMem_Free(b);
free(aString);
free(bString);
free(result);
// return the result as a Python string
return finalResult;
}
..as you can see, i malloc'ed memory, and free'd the memory. However,
I still have python crashing (after only 3 successful calls to
doStuff). And yes, doStuff is a plain C function...nothing related to
Python.
Antoon Pardon wrote:
Op 2005-10-12, Java and Swing schreef [EMAIL PROTECTED]:
static PyObject *wrap_doStuff(PyObject *self, PyObject *args) {
// this will store the result in a Python object
PyObject *finalResult;
// get arguments from Python
char *result = 0;
char *in= 0;
char *aString = 0;
char *bString = 0;
MY_NUM *a;
MY_NUM *b;
int ok = PyArg_ParseTuple(args, sss, in, aString, bString);
if (!ok) return 0;
// do work to get a and b
// count - returns an int; GetVal - returns a char *
a = GetVal(aString, count(aString, ,));
b = GetVal(bString, count(bString, ,));
// make function call, which returns a char *
result = doStuff(in, a, b);
// save result in Python string
finalResult = PyString_FromString(result);
// free memory
PyMem_Free(result);
PyMem_Free(a);
PyMem_Free(b);
// return the result as a Python string
return finalResult;
}
...from python I can call this function 4 times...works fine. WHen I
call it for the fifth time python.exe crashes. im thinking some memory
problem in the wrapper function perhaps...but I am not sure. The
actually C function, doStuff can be called 5, 6,7...N times without a
problem
so i know its gotta be my wrapper.
Any ideas? Thanks!
Well assuming your doStuff is a C function that knows nothing of python.
it might be the PyMem_Free(result).
http://docs.python.org/api/memoryInterface.html says the following:
void PyMem_Free(void *p)
Frees the memory block pointed to by p, which must have been
returned by a previous call to PyMem_Malloc() or PyMem_Realloc().
Otherwise, or if PyMem_Free(p) has been called before, undefined
behavior occurs. If p is NULL, no operation is performed.
But your result wasn't allocated by a PyMem_Malloc, it was returned
to you by a C function.
--
Antoon Pardon
--
http://mail.python.org/mailman/listinfo/python-list
Re: A problem while using urllib
Johnny Lee wrote: Steve Holden wrote: Steve Holden wrote: Johnny Lee wrote: [...] So my conclusion is that there's something in the Cygwin socket module that causes problems not seen under other platforms. I couldn't find any obviously-related error in the Python bug tracker, and I have copied this message to the Cygwin list in case someone there knows what the problem is. Before making any kind of bug submission you should really see if you can build a program shorter that the existing 220+ lines to demonstrate the bug, but it does look to me like your program should work (as indeed it does on other platforms). [...] But if you change urllib2 to urllib, it works under cygwin. Are they using different mechanism to connect to the page? I haven't looked into it that deeply. Perhaps you can take a look at the library code to see what the differences are? regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Very dumb question
I have a program with this code fragment: print len(data) print data[:50] raise SystemExit This prints: 20381 !DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.1//EN But if I change 50 to 51 print len(data) print data[:51] raise SystemExit then it prints 20381 !DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.1//EN After all, only the last 50 bytes are printed. The string is the same (length 20381) in both cases. Surprisingly, I can print more than 50 characters, this works: print 012345678901234567890123456789012345678901234567890123456789A I'm sure it is my mistake, but I don't know what am I doing wrong. Do you have an idea? Thanks, Les -- http://mail.python.org/mailman/listinfo/python-list
Re: C Wrapper Function, crashing Python?
Sorry about the double post...
anyhow, after putting in debug statements I found that it was crashing
when it called, free(result)so I removed the free(result).
now it crashes when it gets to, b = GetVal(bString, count(bString,
,));
..any ideas?
Java and Swing wrote:
Antoon,
I just saw that to. I updated the code like so...
static PyObject *wrap_doStuff(PyObject *self, PyObject *args) {
// this will store the result in a Python object
PyObject *finalResult;
// get arguments from Python
char *result = 0;
char *in= 0;
char *aString = 0;
char *bString = 0;
MY_NUM *a = (MY_NUM *) PyMem_Malloc((20 * sizeof(MY_NUM) + 1); //
the array will be 20 long
MY_NUM *b = (MY_NUM *) PyMem_Malloc((20 * sizeof(MY_NUM) + 1); //
the array will be 20 long
int ok = PyArg_ParseTuple(args, sss, in, aString, bString);
if (!ok) return 0;
// do work to get a and b
// count - returns an int; GetVal - returns a MY_NUM * (a pointer
to a MY_NUM array)
a = GetVal(aString, count(aString, ,));
b = GetVal(bString, count(bString, ,));
// make function call, which returns a char *
result = doStuff(in, a, b);
// save result in Python string
finalResult = PyString_FromString(result);
// free memory
PyMem_Free(a);
PyMem_Free(b);
free(aString);
free(bString);
free(result);
// return the result as a Python string
return finalResult;
}
..as you can see, i malloc'ed memory, and free'd the memory. However,
I still have python crashing (after only 3 successful calls to
doStuff). And yes, doStuff is a plain C function...nothing related to
Python.
Antoon Pardon wrote:
Op 2005-10-12, Java and Swing schreef [EMAIL PROTECTED]:
static PyObject *wrap_doStuff(PyObject *self, PyObject *args) {
// this will store the result in a Python object
PyObject *finalResult;
// get arguments from Python
char *result = 0;
char *in= 0;
char *aString = 0;
char *bString = 0;
MY_NUM *a;
MY_NUM *b;
int ok = PyArg_ParseTuple(args, sss, in, aString, bString);
if (!ok) return 0;
// do work to get a and b
// count - returns an int; GetVal - returns a char *
a = GetVal(aString, count(aString, ,));
b = GetVal(bString, count(bString, ,));
// make function call, which returns a char *
result = doStuff(in, a, b);
// save result in Python string
finalResult = PyString_FromString(result);
// free memory
PyMem_Free(result);
PyMem_Free(a);
PyMem_Free(b);
// return the result as a Python string
return finalResult;
}
...from python I can call this function 4 times...works fine. WHen I
call it for the fifth time python.exe crashes. im thinking some memory
problem in the wrapper function perhaps...but I am not sure. The
actually C function, doStuff can be called 5, 6,7...N times without a
problem
so i know its gotta be my wrapper.
Any ideas? Thanks!
Well assuming your doStuff is a C function that knows nothing of python.
it might be the PyMem_Free(result).
http://docs.python.org/api/memoryInterface.html says the following:
void PyMem_Free(void *p)
Frees the memory block pointed to by p, which must have been
returned by a previous call to PyMem_Malloc() or PyMem_Realloc().
Otherwise, or if PyMem_Free(p) has been called before, undefined
behavior occurs. If p is NULL, no operation is performed.
But your result wasn't allocated by a PyMem_Malloc, it was returned
to you by a C function.
--
Antoon Pardon
--
http://mail.python.org/mailman/listinfo/python-list
Re: A Tree class, my $0.02 contribution to the python community.
Antoon Pardon wrote: Comments are welcome: http://www.pardon-sleeuwaegen.be/antoon/avltree.html Does this type bear any relationship at all to what most people call a tree, which is a bifurcated data structure? Or do you call it a tree for some other reason? Sounds like cdict might be a better name ... regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: can we save print msg into a file when script running ?
unluckly i am with windows, anyway tks ! -- http://mail.python.org/mailman/listinfo/python-list
Re: can we save print msg into a file when script running ?
quote: === script.py script.log 21 === what does 21 mean pls ? -- http://mail.python.org/mailman/listinfo/python-list
Re: Very dumb question
Laszlo Zsolt Nagy wrote: Laszlo Zsolt Nagy wrote: I have a program with this code fragment: print len(data) print data[:50] raise SystemExit This prints: 20381 !DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.1//EN But if I change 50 to 51 print len(data) print data[:51] raise SystemExit then it prints 20381 !DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.1//EN After all, only the last 50 bytes are printed. The string is the same (length 20381) in both cases. Hmm, I checked on Windows now and it is working. But it is bad on FreeBSD/Python 2.4.1 Very strange. len(data[:100]) returns 100, but if I try to print it, only the first 50 characters printed. Les Is 'data' a Unicode string, or do you have some terminal control charachters in the string? Most printable ASCII charachters are between 32 and 126. What does this print?: print [i for (i,c) in enumerate(data) if not (32 = ord(c) = 126)] -- http://mail.python.org/mailman/listinfo/python-list
Re: A Tree class, my $0.02 contribution to the python community.
Steve Holden wrote: Does this type bear any relationship at all to what most people call a tree, which is a bifurcated data structure? Or do you call it a tree for some other reason? I'd think that the 'avl' part would answer that question. !google avl tree -- Joshua Simpson -- dataw0lf.org Lead Network Administrator/Engineer Aero-Graphics Inc. [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: Very dumb question
Laszlo Zsolt Nagy wrote:
I have a program with this code fragment:
print len(data)
print data[:50]
raise SystemExit
This prints:
20381
!DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.1//EN
But if I change 50 to 51
print len(data)
print data[:51]
raise SystemExit
then it prints
20381
!DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.1//EN
After all, only the last 50 bytes are printed. The string is the same
(length 20381) in both cases.
(snip
I'm sure it is my mistake, but I don't know what am I doing wrong. Do
you have an idea?
I assume the code snippets are exact copy/paste so this is not a typo
(like print data[51:] ...) - and I can't reproduce it here... even with
a string of 20381 characters.
mmm...
type(data) ???
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
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Re: Very dumb question
Laszlo Zsolt Nagy wrote:
I have a program with this code fragment:
print len(data)
print data[:50]
raise SystemExit
This prints:
20381
!DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.1//EN
But if I change 50 to 51
print len(data)
print data[:51]
raise SystemExit
then it prints
20381
!DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.1//EN
The closest I can get to your situation is
[on linux]
print abc\rx[:4]
abc
print abc\rx[:5]
xbc
i. e. a character after a 'carriage return' ('\r') overwrites part of the
string which therefore doesn't seem to grow. Try
print repr(data[:51])
to see what's really in your data string.
Peter
--
http://mail.python.org/mailman/listinfo/python-list
Re: can we save print msg into a file when script running ?
black wrote: in my .py file there are a few print to trace out some message and i wonder if we can save it into a specified file when that script get running. if so, i may just check that file to c how the script is running. can anyone show me a right direction ? If you don't feel comfortable with the command line you can stick import sys sys.stdout = open(mylogfile.txt, w) at the beginning of your file. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: C Wrapper Function, crashing Python?
ok, further digging...I found that in the C function GetVal...it is
crashing where I try to malloc some memory. Note, I have no problems
when running this from C..just from Python using my wrapper.
GetVal looks something like..
MY_NUM *GetVal(const char *in, const int x) {
MY_NUM *results, *returnResults;
results = (MY_NUM *) malloc((x * sizeof(MY_NUM) + 1);
returnResults = results;
// ..do more work..
return returnResults;
}
I put in print statements into the C code and found that it is crashing
at the line where I malloc some space for results.
...any ideas why this is crashing when calling from Python via C
wrapper?
Java and Swing wrote:
Sorry about the double post...
anyhow, after putting in debug statements I found that it was crashing
when it called, free(result)so I removed the free(result).
now it crashes when it gets to, b = GetVal(bString, count(bString,
,));
..any ideas?
Java and Swing wrote:
Antoon,
I just saw that to. I updated the code like so...
static PyObject *wrap_doStuff(PyObject *self, PyObject *args) {
// this will store the result in a Python object
PyObject *finalResult;
// get arguments from Python
char *result = 0;
char *in= 0;
char *aString = 0;
char *bString = 0;
MY_NUM *a = (MY_NUM *) PyMem_Malloc((20 * sizeof(MY_NUM) + 1); //
the array will be 20 long
MY_NUM *b = (MY_NUM *) PyMem_Malloc((20 * sizeof(MY_NUM) + 1); //
the array will be 20 long
int ok = PyArg_ParseTuple(args, sss, in, aString, bString);
if (!ok) return 0;
// do work to get a and b
// count - returns an int; GetVal - returns a MY_NUM * (a pointer
to a MY_NUM array)
a = GetVal(aString, count(aString, ,));
b = GetVal(bString, count(bString, ,));
// make function call, which returns a char *
result = doStuff(in, a, b);
// save result in Python string
finalResult = PyString_FromString(result);
// free memory
PyMem_Free(a);
PyMem_Free(b);
free(aString);
free(bString);
free(result);
// return the result as a Python string
return finalResult;
}
..as you can see, i malloc'ed memory, and free'd the memory. However,
I still have python crashing (after only 3 successful calls to
doStuff). And yes, doStuff is a plain C function...nothing related to
Python.
Antoon Pardon wrote:
Op 2005-10-12, Java and Swing schreef [EMAIL PROTECTED]:
static PyObject *wrap_doStuff(PyObject *self, PyObject *args) {
// this will store the result in a Python object
PyObject *finalResult;
// get arguments from Python
char *result = 0;
char *in= 0;
char *aString = 0;
char *bString = 0;
MY_NUM *a;
MY_NUM *b;
int ok = PyArg_ParseTuple(args, sss, in, aString, bString);
if (!ok) return 0;
// do work to get a and b
// count - returns an int; GetVal - returns a char *
a = GetVal(aString, count(aString, ,));
b = GetVal(bString, count(bString, ,));
// make function call, which returns a char *
result = doStuff(in, a, b);
// save result in Python string
finalResult = PyString_FromString(result);
// free memory
PyMem_Free(result);
PyMem_Free(a);
PyMem_Free(b);
// return the result as a Python string
return finalResult;
}
...from python I can call this function 4 times...works fine. WHen I
call it for the fifth time python.exe crashes. im thinking some memory
problem in the wrapper function perhaps...but I am not sure. The
actually C function, doStuff can be called 5, 6,7...N times without a
problem
so i know its gotta be my wrapper.
Any ideas? Thanks!
Well assuming your doStuff is a C function that knows nothing of python.
it might be the PyMem_Free(result).
http://docs.python.org/api/memoryInterface.html says the following:
void PyMem_Free(void *p)
Frees the memory block pointed to by p, which must have been
returned by a previous call to PyMem_Malloc() or PyMem_Realloc().
Otherwise, or if PyMem_Free(p) has been called before, undefined
behavior occurs. If p is NULL, no operation is performed.
But your result wasn't allocated by a PyMem_Malloc, it was returned
to you by a C function.
--
Antoon Pardon
--
http://mail.python.org/mailman/listinfo/python-list
Re: C Extension - return an array of longs or pointer?
Brandon K [EMAIL PROTECTED] writes: long* result = 0; [...] result = doNumberStuff(in,x); len = sizeof(result)/sizeof(long); I don't think this will do what you appear to expect it to do. Bernhard -- Intevation GmbH http://intevation.de/ Skencil http://skencil.org/ Thuban http://thuban.intevation.org/ -- http://mail.python.org/mailman/listinfo/python-list
Re: can we save print msg into a file when script running ?
black wrote: quote: === script.py script.log 21 === what does 21 mean pls ? It's Unix shell-speak for send the standard error stream to the same place as the standard output. Probably a syntax error on Windows ... regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
RE: Very dumb question
Indeed,Are you writing a new book? http://www.amazon.com/exec/obidos/ASIN/1563052857/wildwierdmathpro David --- Surf a wave to the future with a free tracfone http://cellphone.duneram.com/index.html From: Laszlo Zsolt Nagy [EMAIL PROTECTED] To: python-list@python.org Subject: Very dumb question Date: Wed, 12 Oct 2005 15:39:29 +0200 I have a program with this code fragment: print len(data) print data[:50] raise SystemExit This prints: 20381 !DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.1//EN But if I change 50 to 51 print len(data) print data[:51] raise SystemExit then it prints 20381 !DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.1//EN After all, only the last 50 bytes are printed. The string is the same (length 20381) in both cases. Surprisingly, I can print more than 50 characters, this works: print 012345678901234567890123456789012345678901234567890123456789A I'm sure it is my mistake, but I don't know what am I doing wrong. Do you have an idea? Thanks, Les -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Very dumb question
I assume the code snippets are exact copy/paste so this is not a typo (like print data[51:] ...) - and I can't reproduce it here... even with a string of 20381 characters. Yes, they were cut out. type(data) returns 'type str'. The data was downloaded from a website, it starts with !DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.1//EN http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd; Even if it had special control characters in it, I do not understand the effect (printing only the first 50 chars). But probably it is an issue with the terminal, since it is working fine on Windows. Les -- http://mail.python.org/mailman/listinfo/python-list
Re: Jargons of Info Tech industry
Casper H.S. Dik [EMAIL PROTECTED] writes: Steven D'Aprano [EMAIL PROTECTED] writes: Can I remind you that spam is approximately 70% of all email traffic these days? Most of that is blocked by the ISPs, but even so you are obviously one of the lucky few. 95% - 99% of all email, not 70% (just ask your ISP). A large percentage of the cost of email is the cost of getting rid of SPAM; and that cannot happen without colleteral damage in the form of lost valid email, not just because of improper filtering but also because the more layers are there to touch the email the bigger the chances that it does not arrive. I'd like to take this opportunity to correct myself. I said that I (and another poster) didn't have a spam problem. That's wrong. We don't *appear* to have a spam problem, but that's just an illusion. Our ISPs are spending money - as indicated by Mr. Dik - on filtering spam. They're also spending money to deal with complaints about spam from their customers - in both senses of the sentence, and to pay for the bandwidth the spam is eating up. The bulk providers they buy their bandwidth from also have higher costs to provide bandwidth for spam. These costs are passed on to us. So while we may not have an obvious spam problem, we have one in the sense that spam takes money from our pockets. mike -- Mike Meyer [EMAIL PROTECTED] http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. -- http://mail.python.org/mailman/listinfo/python-list
Re: Very dumb question
i. e. a character after a 'carriage return' ('\r') overwrites part of the
string which therefore doesn't seem to grow. Try
print repr(data[:51])
to see what's really in your data string.
Yes, that was it! Thanks for you help. I thought it will be something
obvious.
The server returned carriage returns in the HTML source code, and I
tried to print that. :-)
Les
--
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Re: [Info] PEP 308 accepted - new conditional expressions
On Tue, 11 Oct 2005 01:06:30 -0400, George Sakkis [EMAIL PROTECTED] wrote: Dave Hansen [EMAIL PROTECTED] wrote: On Mon, 10 Oct 2005 16:42:34 -0500, Terry Hancock [EMAIL PROTECTED] wrote: On Sunday 09 October 2005 07:50 am, phil hunt wrote: On Fri, 7 Oct 2005 01:05:12 -0500, Terry Hancock [EMAIL PROTECTED] wrote: GvR's syntax has the advantage of making grammatical sense in English (i.e. reading it as written pretty much makes sense). I know, let's re-write Python to make it more like COBOL! That's bound to be a winner! Whereas the natural order of condition affirmative negative is natural for what reason? That it is so in C? And Basic, and Fortran, and Lisp, and just about any programming language you care to name, including python (if Condition: Affirmative else: Negative). Block delimiters (curly braces, if/fi, begin/end, etc.) are also in just about any language but this didn't stop python using indentation instead, so what's your point ? Conformity and backwards The point is order of execution. The condition is tested first, so it should appear first. I can think of no other language besides Perl where that is not the case. Admittedly, I don't know every other, or even a large number, of other languages. compatibility should not be top priorities in language design; fortunately for python, they're not. Conformity I'd agree with, backwards capatibility I strongly disagree. Breaking existing programs is a Bad Thing(tm). All the code I wrote for Python 1.52 still seems to work in 2.4. Regards, -=Dave -- Change is inevitable, progress is not. -- http://mail.python.org/mailman/listinfo/python-list
Re: Make SimpleXMLRPCServer Require Auth?
John Abel wrote: Hi, I implemented a SimpleXMLRPCServer, modified it slightly to restrict clients based on their IP, but I need to take it a stage further, and add user authentication. I would appreciate any pointers as to how I might go about this, or any packages which already provide this. I'm guessing that I'll need to make changes to BaseHTTPServer. Thanks J Never mind, managed to modify SimpleXMLRPCServer with code from the digest examples in Python sandbox. J -- http://mail.python.org/mailman/listinfo/python-list
Re: [Info] PEP 308 accepted - new conditional expressions
On Wed, 12 Oct 2005 13:02:20 +0200, Piet van Oostrum [EMAIL PROTECTED] wrote: Paul Rubin http://[EMAIL PROTECTED] (PR) wrote: [...] PR Yeah, if C then A else B is a ancient tradition stretching from PR Algol-60 to OCAML, and who knows what all else in between. I'm not PR sure what Guido saw in the A if C else B syntax but it's not a big deal. I suspect it is because if C then A else B gives problems in the parser because it would have difficulty to distinguish this in time from the if statement. This is because the parser doesn't use a very strong formalism. So lose the if. R = C then A else B I don't think python uses the question mark for anything. Throw that in, if it makes parsing easier: R = C ? then A else B Regards, -=Dave -- Change is inevitable, progress is not. -- http://mail.python.org/mailman/listinfo/python-list
Re: Adding a __filename__ predefined attribute to 2.5?
Rune Strand wrote: Excuse me, do you suffer from a bad hair-day? I didn't say it is platform independant. It's ok for my use on Linux and Windows. If you cannot imagine any other usecase for a __filename__ attribute, that's your problem, not mine. I think you are the one who wants __filename__, not me. So I don't have to have any usecase for it. And requesting random features built into the interpreter without even specifying a usecase - as remote as it may be - isn't very likely happen, don't you think? Which I wanted to express with my apparently misunderstood solve_my_problem()-example. And if your solution isn't platform-independent and one (several people actually) provides you with one that is short and concise and no overhead at all - well, that _could_ trigger a cool, didn't know about that-reaction. But obviously, it hasn't. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Adding a __filename__ predefined attribute to 2.5?
Diez B. Roggisch wrote: And requesting random features built into the interpreter without even specifying a usecase - as remote as it may be - isn't very likely happen, don't you think? Which I wanted to express with my apparently misunderstood solve_my_problem()-example. Reread your post - you did specify it. So forget about that. Maybe I _have_ a bad hair day - even though I'm pretty bald. Might be because of too much JAVA these days... *sigh* Sorry. Diez -- http://mail.python.org/mailman/listinfo/python-list
Agile Job Opening at Lond Island, NY
We are looking for an Agile/XP developer to expand our small team of programmers (5 members). This is a full time position. For more information about this posting go to: http://naples.cc.sunysb.edu/Admin/CampusJob.nsf/af51a98c4c56cd5c85256731006ae132/ed74d7b69bd353428525709200571558?OpenDocument Candidates may apply online through the link above or send resumes to: Linda Greenstein Medical Informatics Department SUNY 8330 Stony Brook, NY 11794-8330 -- http://mail.python.org/mailman/listinfo/python-list
Re: calling matlab
Mohammed Smadi wrote: Hi; Does anyone know if we can call matlab for a python or bash script while feeding the matlab script some command line arguments? I have an interactive matlab script which i want to automate by feeding the args from a script. Depending on how interactive it is, you should look at the subprocess module in the stdlib or pexpect. http://docs.python.org/lib/module-subprocess.html http://pexpect.sourceforge.net/ -- Robert Kern [EMAIL PROTECTED] In the fields of hell where the grass grows high Are the graves of dreams allowed to die. -- Richard Harter -- http://mail.python.org/mailman/listinfo/python-list
Re: can we save print msg into a file when script running ?
Steve Holden wrote: what does 21 mean pls ? It's Unix shell-speak for send the standard error stream to the same place as the standard output. Probably a syntax error on Windows ... more test.py import sys sys.stdout.write(stdout!\n) sys.stderr.write(stderr!\n) python test.py out stderr! python test.py 2out stdout! python test.py out 21 more out stdout! stderr! ver Microsoft Windows XP [Version 5.1.2600] /F -- http://mail.python.org/mailman/listinfo/python-list
Re: A Tree class, my $0.02 contribution to the python community.
Antoon Pardon [EMAIL PROTECTED] wrote: Comments are welcome: http://www.pardon-sleeuwaegen.be/antoon/avltree.html How about adding two shortcut methods, nextkey(k) and prevkey(k), to return the next and previous key respectively ? For instance nextkey would be equivalent to (untested): def nextkey(self, key): iter = self[key:] first = iter.next() if key not in self: return first else: return iter.next() Also for consistency, nextvalue(k), prevvalue(k), nextitem(k), previtem(k) would be reasonable additions. And a question: what does step do if the keys are not integers since you restrict step to be integer ? George -- http://mail.python.org/mailman/listinfo/python-list
Windows memory pointers in Python?
Hi guys,
I'm really lost of on this one. How can I turn this (VB?) code
into Python? Basically I call a function exposed from a dll and
it returns me what I believe is a pointer to a location in
memory? Now I need to read that area to get the string I
need. This link has the solution but it is written in VB:
http://www.contactreview.com/mb/showflat.php/Cat/0/Number/15670/an/0/page/14 (it's the third post down)
I have to think Python would have something similiar.
Below is my relevant source code just in case you need that too.
I really appriciate any help anyone might have.
-- Gregory PiñeroChief Innovation OfficerBlended Technologies(www.blendedtechnologies.com)
#---My code: (testing the GOLDMINE API)
from ctypes import *
windll.LoadLibrary('GM6S32.dll')
windll.GM6S32.GMW_LoadBDE('J:\\','J:\\GMBase\\',r'J:\\Common\\','user','pw')
windll.GM6S32.GMW_NV_SetValue(container,AccountNo, (310)555-1212)
#finally, I call a function to see what I stored:
windll.GM6S32.GMW_NV_GetValue(container, AccountNo, '(none)')
#it returns 16236360
#Now I need to access the string related to this somewhere ...
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Listen for directory events
Anyone have any advice on listening for directory events? I'd like to fire off my script if new files are added to a directory. Right now, I've set up my script as a scheduled task (Windows XP) and when the script is run periodically, it initially looks for new files and does it's magic if there are some. I assume I could have python check for new files then sleep for a bit, and check again. If I did it that way, would I run into problems running other py scripts while the first one was active? I read about processes being protected from each other, but didn't really grok it in fullness. Kev -- http://mail.python.org/mailman/listinfo/python-list
Re: C Wrapper Function, crashing Python?
Java and Swing [EMAIL PROTECTED] writes:
static PyObject *wrap_doStuff(PyObject *self, PyObject *args) {
[...]
char *aString = 0;
char *bString = 0;
[...]
int ok = PyArg_ParseTuple(args, sss, in, aString, bString);
[...]
free(aString);
free(bString);
aString and bString are pointers to memory managed by the strings in
your args tuple. You must not free them! The memory is automatically
managed by Python.
Bernhard
--
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Skencil http://skencil.org/
Thuban http://thuban.intevation.org/
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Re: Converting C++ array into Python
Like others, without more information on what you have tried we are just guessing. Many times I've used the struct.unpack() module to unpack C arrays into python objects. Don't know if this will help, but thought I'd pass it along. Post some code and we can help more. -Larry Bates Adriaan Renting wrote: try using SWIG? You give very little information about how you are trying to accomplish this. From your mention of C++ you seem to mean a vector, not an array, I suggest you read the documentation of SWIG, and maybe someone can help you if you give a clear example of what you are trying to accomplish, how, and why it fails. Adriaan Renting. Deshdeep, Singh (IE10) [EMAIL PROTECTED] 10/04/05 7:33 am I am extending C++ application with python. I am not able to convert a C++ array in Python. If anyone has the experience of the below :- 1)How to handle the C++ array in the Python code and how to input that from the script ? Awaiting for the solution Regards DD -- http://mail.python.org/mailman/listinfo/python-list
Re: Windows memory pointers in Python?
Well, I think I've got it after a bit of research:
c_char_p(address) seems to do the trick. Thus it would be:
ctypes.c_char_p(address)
Of course still let me know if this is somehow WRONG, or if there
is a better way, but this seems good. Thanks again ctypes!
http://starship.python.net/crew/theller/ctypes/
-Greg
On 10/12/05, Gregory Piñero [EMAIL PROTECTED] wrote:
Hi guys,
I'm really lost of on this one. How can I turn this (VB?) code
into Python? Basically I call a function exposed from a dll and
it returns me what I believe is a pointer to a location in
memory? Now I need to read that area to get the string I
need. This link has the solution but it is written in VB:
http://www.contactreview.com/mb/showflat.php/Cat/0/Number/15670/an/0/page/14
(it's the third post down)
I have to think Python would have something similiar.
Below is my relevant source code just in case you need that too.
I really appriciate any help anyone might have.
-- Gregory PiñeroChief Innovation OfficerBlended Technologies(www.blendedtechnologies.com
)
#---My code: (testing the GOLDMINE API)
from ctypes import *
windll.LoadLibrary('GM6S32.dll')
windll.GM6S32.GMW_LoadBDE('J:\\','J:\\GMBase\\',r'J:\\Common\\','user','pw')
windll.GM6S32.GMW_NV_SetValue(container,AccountNo, (310)555-1212)
#finally, I call a function to see what I stored:
windll.GM6S32.GMW_NV_GetValue(container, AccountNo, '(none)')
#it returns 16236360
#Now I need to access the string related to this somewhere ...
-- Gregory PiñeroChief Innovation OfficerBlended Technologies(www.blendedtechnologies.com)
--
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Re: Listen for directory events
Googling for python watch for directory changes turns these links: http://tgolden.sc.sabren.com/python/win32_how_do_i/watch_directory_for_changes.html http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/156178 http://www.amk.ca/python/simple/dirwatch.html One of those should help you out. Google is your friend! Larry Bates Bell, Kevin wrote: Anyone have any advice on listening for directory events? I'd like to fire off my script if new files are added to a directory. Right now, I've set up my script as a scheduled task (Windows XP) and when the script is run periodically, it initially looks for new files and does it's magic if there are some. I assume I could have python check for new files then sleep for a bit, and check again. If I did it that way, would I run into problems running other py scripts while the first one was active? I read about processes being protected from each other, but didn't really grok it in fullness. Kev -- http://mail.python.org/mailman/listinfo/python-list
Re: C Wrapper Function, crashing Python?
thanks for the tip, however even when I do not free aString or bString,
i'm still crashing at the malloc in the c function, not the wrapper.
Bernhard Herzog wrote:
Java and Swing [EMAIL PROTECTED] writes:
static PyObject *wrap_doStuff(PyObject *self, PyObject *args) {
[...]
char *aString = 0;
char *bString = 0;
[...]
int ok = PyArg_ParseTuple(args, sss, in, aString, bString);
[...]
free(aString);
free(bString);
aString and bString are pointers to memory managed by the strings in
your args tuple. You must not free them! The memory is automatically
managed by Python.
Bernhard
--
Intevation GmbH http://intevation.de/
Skencil http://skencil.org/
Thuban http://thuban.intevation.org/
--
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RE: Listen for directory events
[Bell, Kevin] | Anyone have any advice on listening for directory events? Would this be of any use? http://tgolden.sc.sabren.com/python/win32_how_do_i/watch_directory_for_changes.html TJG This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk -- http://mail.python.org/mailman/listinfo/python-list
Re: C Wrapper Function, crashing Python?
Java and Swing [EMAIL PROTECTED] writes: thanks for the tip, however even when I do not free aString or bString, i'm still crashing at the malloc in the c function, not the wrapper. Do you have any more places where you use free incorrectly? In my experience, calling free with invalid values can corrupt the data structures used by the memory allocator in such a way that subsequent malloc calls crash. Bernhard -- Intevation GmbH http://intevation.de/ Skencil http://skencil.org/ Thuban http://thuban.intevation.org/ -- http://mail.python.org/mailman/listinfo/python-list
slots? SLOTS?
Dear pythonista, what is a slot in python? I stumbled over it in several meta-reflection discussions and hard-core developer talk, but found no mention of it in the language reference. Google coughs up more interesting banter about it, but no specifics. Is it a feature that was once planned (for 2.2 or so) and later abandoned? I find no *new* talk about it. Thanks for your attention Tin -- http://mail.python.org/mailman/listinfo/python-list
Re: C Wrapper Function, crashing Python?
As far as my C Wrapper functions are concerned...I no longer have the
need for free(...). I do use PyMem_Free, for structures I allocated by
using PyMem_New(...).
In my C code I do have things such as...
char *foo(const char *in) {
char *tmp;
tmp = (char *) malloc((strlen(in) * sizeof(char)) + 1);
strcpy(tmp, in);
...
...
free(tmp);
return someValue;
}
Is that appropriate? I was under the impression that when you malloc
memory, you free it when done.
I also have things like...
char *bar(char *in) {
char *results, *finalResults;
results = (char *) malloc(...);
finalResults = results;
while (...) { *results++ = some_val; }
return finalResults;
}
...is that correct?
As I mentioned earlier, when I run these functions from C I have no
troubles...I can run them 5, 10, 15 times, etc. From Python, using my
wrapper function is when I have trouble.
Thanks in advance.
Bernhard Herzog wrote:
Java and Swing [EMAIL PROTECTED] writes:
thanks for the tip, however even when I do not free aString or bString,
i'm still crashing at the malloc in the c function, not the wrapper.
Do you have any more places where you use free incorrectly? In my
experience, calling free with invalid values can corrupt the data
structures used by the memory allocator in such a way that subsequent
malloc calls crash.
Bernhard
--
Intevation GmbH http://intevation.de/
Skencil http://skencil.org/
Thuban http://thuban.intevation.org/
--
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Scope problem with nested functions.
I'm having trouble resolving a
scope problem. I have a module, called from another script, with this
structure:
def parseFile(file, myLocation,
defaults):
#
initialisation.
ccyMappings = {}
def
getCcyMappings()
global
ccyMappings
# read values into
ccyMappings.
ccyMappings['CAN']
= ['CAD'] # for example.
def mapCcy(myCcy): if
ccyMappings.has_key(myCcy):
return ccyMapping['myCcy']
else: return myCcy
My problem is that, although
the ccyMappings dictionary is populated within the def getCcyMappings()
function, the value goes to 'None' when I leave it and so is not available when
the mapCcy function is called. I've used the global scope declaration
successfully before, but not with nested functions like this,
admittedly.
Any assistance gratefully
received.
Nick.
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Re: Python's garbage collection was Re: Python reliability
On Mon, 10 Oct 2005 20:37:03 +0100, Tom Anderson [EMAIL PROTECTED] wrote: On Mon, 10 Oct 2005, it was written: ... There is no way you can avoid making garbage. Python conses everything, even integers (small positive ones are cached). So python doesn't use the old SmallTalk 80 SmallInteger hack, or similar? If the SmallInteger hack is something like this, it does: a = 42 b = 42 a is b True a = 42000 b = 42000 a is b False ... which I guess is what if referred to above as small positive ones are cached. /Jorgen -- // Jorgen Grahn jgrahn@ Ph'nglui mglw'nafh Cthulhu \X/algonet.se R'lyeh wgah'nagl fhtagn! -- http://mail.python.org/mailman/listinfo/python-list
Re: slots? SLOTS?
On 12/10/05, tin gherdanarra [EMAIL PROTECTED] wrote: what is a slot in python? http://www.python.org/doc/current/ref/slots.html -- Cheers, Simon B, [EMAIL PROTECTED], http://www.brunningonline.net/simon/blog/ -- http://mail.python.org/mailman/listinfo/python-list
Re: C Wrapper Function, crashing Python?
Java and Swing [EMAIL PROTECTED] writes:
char *foo(const char *in) {
char *tmp;
tmp = (char *) malloc((strlen(in) * sizeof(char)) + 1);
strcpy(tmp, in);
...
...
free(tmp);
return someValue;
}
Is that appropriate? I was under the impression that when you malloc
memory, you free it when done.
Looks fine. I hope someValue does not point somewhere into the tmp
buffer, though.
I also have things like...
char *bar(char *in) {
char *results, *finalResults;
results = (char *) malloc(...);
finalResults = results;
while (...) { *results++ = some_val; }
return finalResults;
}
Seems OK, too, assuming the results buffer is big enough.
Bernhard
--
Intevation GmbH http://intevation.de/
Skencil http://skencil.org/
Thuban http://thuban.intevation.org/
--
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Re: C Wrapper Function, crashing Python?
Bernhard Herzog wrote:
Java and Swing [EMAIL PROTECTED] writes:
char *foo(const char *in) {
char *tmp;
tmp = (char *) malloc((strlen(in) * sizeof(char)) + 1);
strcpy(tmp, in);
...
...
free(tmp);
return someValue;
}
Is that appropriate? I was under the impression that when you malloc
memory, you free it when done.
Looks fine. I hope someValue does not point somewhere into the tmp
buffer, though.
someValue doesn't.
I also have things like...
char *bar(char *in) {
char *results, *finalResults;
results = (char *) malloc(...);
finalResults = results;
while (...) { *results++ = some_val; }
return finalResults;
}
Seems OK, too, assuming the results buffer is big enough.
results = (char *) malloc((sizeof(char) * strlen(in) + 1);
..should be big enough. At any rate, it works four times in a row
before it fails.
I wonder what else or how else to solve this. Why is malloc'ing
the memory crashing it!?
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Re: [Info] PEP 308 accepted - new conditional expressions
Chris Smith [EMAIL PROTECTED] wrote: What I really want to do is take four lines of conditional, and put them into one, as well as blow off dealing with a 'filler' variable: return the answer is + yes if X==0 else no I would write this as: return the answer is + (yes if X==0 else no) Adding the parens makes it clearer. I've long since given up trying to remember operator precedence (except for the most basic like multiplication is stronger than addition) and use parens with wild abandon. -- http://mail.python.org/mailman/listinfo/python-list
Re: calling matlab
There is a module named pymat avvailable from http://sourceforge.net/projects/pymat that provides a limited set of functions for intertfacing Python to Matlab. The functions are: open for opening a Matlab session close for closing a Matlab session eval for evaluating a Matlab command put for sending a matrix to Matlab get for getting a matrix from Matlab Mohammed, you might want to look at this module to see if it has the functionality you need. Howard Mohammed Smadi wrote: Hi; Does anyone know if we can call matlab for a python or bash script while feeding the matlab script some command line arguments? I have an interactive matlab script which i want to automate by feeding the args from a script. I know this is probably more suitable to a matlab group but any ideas will be appreciated. thanks moe smadi -- http://mail.python.org/mailman/listinfo/python-list
Re: C Extension - return an array of longs or pointer?
On 12 Oct 2005 04:46:34 -0700, Java and Swing [EMAIL PROTECTED] wrote: ... ...my question is...in the c code, result is a pointer to an array of longs, how can I get the returned result to be a list or something similar to an array in Python? RTFM. There are API functions to create an empty list [] and to append objects to a list. PyList_something(), I think. ...I also have a function which returns a character array (denoted by a char *)...would it work the same as the previous question? You might want to return this as a Python string, even if it's just random octet data garbage. Depends on what that data really represents, but it's a common idiom, and modules like struct and array expect their data to be strings. Note that Python strings may contain NUL bytes. /Jorgen -- // Jorgen Grahn jgrahn@ Ph'nglui mglw'nafh Cthulhu \X/algonet.se R'lyeh wgah'nagl fhtagn! -- http://mail.python.org/mailman/listinfo/python-list
