Partial 1.0 - Partial classes for Python
I'm happy to announce partial 1.0; a module to implement partial classes in Python. It is available from http://cheeseshop.python.org/pypi/partial/1.0 A partial class is a fragment of a class definition; partial classes allow to spread the definition of a class over several modules. One location serves as the original definition of the class. To extend a class original_module.FullClass with an additional function, one writes from partial import * import original_module class ExtendedClass(partial, original_module.FullClass): def additional_method(self, args): body more_methods This module is licensed under the Academic Free License v3.0. Please send comments and feedback to [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
[ANN] DirectPython 0.8
A new version of DirectPython is now available at http://directpython.sourceforge.net/ What is it? --- DirectPython is a C++ extension to the Python programming language which provides basic access to DirectX (9.0c) API, including Direct3D, DirectSound, DirectShow and DirectInput. The full distribution is very easy to install and it includes many samples and documentation that show the basics of DirectPython programming. No additional packages are needed. Whats new in 0.8.0? -- Too much to mention here. Check the release notes for more information. There are some changes which break backwards compatibility with 0.7. Requirements - A Windows operating system (98 and up) with Python (2.4/2.5) and DirectX 9.0c installed. -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Re: Can Parallel Python run on a muti-CPU server ?
From the www.parallelpython.com , the 'Features' section: Features: *Parallel execution of python code on SMP and clusters --- PP uses processes, and thus it will take advantage of multiple cores for a CPU bound task. -Nick On Feb 6, 9:13 pm, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi all, I'm interested in Parallel Python and I learned from the website of Parallel Python that it can run on SMP and clusters. But can it run on a our muti-CPU server ? We are running an origin3800 server with 128 CPUs. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: sgmllib bug in Python 2.5, works in 2.4.
John Nagle wrote: (Was prevously posted as a followup to something else by accident.) I'm running a website page through BeautifulSoup. It parses OK with Python 2.4, but Python 2.5 fails with an exception: Traceback (most recent call last): File ./sitetruth/InfoSitePage.py, line 268, in httpfetch self.pagetree = BeautifulSoup.BeautifulSoup(sitetext) # parse into tree form File ./sitetruth/BeautifulSoup.py, line 1326, in __init__ BeautifulStoneSoup.__init__(self, *args, **kwargs) File ./sitetruth/BeautifulSoup.py, line 973, in __init__ self._feed() File ./sitetruth/BeautifulSoup.py, line 998, in _feed SGMLParser.feed(self, markup or ) File /usr/lib/python2.5/sgmllib.py, line 99, in feed self.goahead(0) File /usr/lib/python2.5/sgmllib.py, line 133, in goahead k = self.parse_starttag(i) File /usr/lib/python2.5/sgmllib.py, line 291, in parse_starttag self.finish_starttag(tag, attrs) File /usr/lib/python2.5/sgmllib.py, line 340, in finish_starttag self.handle_starttag(tag, method, attrs) File /usr/lib/python2.5/sgmllib.py, line 376, in handle_starttag method(attrs) File ./sitetruth/BeautifulSoup.py, line 1416, in start_meta self._feed(self.declaredHTMLEncoding) File ./sitetruth/BeautifulSoup.py, line 998, in _feed SGMLParser.feed(self, markup or ) File /usr/lib/python2.5/sgmllib.py, line 99, in feed self.goahead(0) File /usr/lib/python2.5/sgmllib.py, line 133, in goahead k = self.parse_starttag(i) File /usr/lib/python2.5/sgmllib.py, line 285, in parse_starttag self._convert_ref, attrvalue) UnicodeDecodeError: 'ascii' codec can't decode byte 0xa7 in position 0: ordinal not in range(128) The code that's failing is in _convert_ref, which is new in Python 2.5. That function wasn't present in 2.4. I think the code is trying to handle single quotes inside of double quotes, or something like that. To replicate, run http://www.bankofamerica.com or http://www.gm.com through BeautifulSoup. Something about this code doesn't like big companies. Web sites of smaller companies are going through OK. Also reported as a bug: [ 1651995 ] sgmllib _convert_ref UnicodeDecodeError exception, new in 2.5 Found the problem and updated the bug report with a fix. But someone else will have to check it in. There's a place in SGMLParser where someone assumed that values 0..255 were valid ASCII characters. But in fact the allowed range is 0..127. The effect is that Unicode strings containing values between 128 and 255 will blow up SGMLParser. In fact, you can even make this happen with an ASCII source file by using an HTML entity which has a Unicode representation between 128 and 255, (such as sect;), then using something Unicode-oriented like BeautifulSoup on it. John Nagle -- http://mail.python.org/mailman/listinfo/python-list
Re: How to prevent from race conditions to share data between many process and thread in python
mars a écrit : I use TurboGears to do some web service. TurboGears use cherrypy. When web browser access this site, the cherrypy will call my python program. So my program looks like a lib. When web browser access the site, the http server will fock a process or gerenate a thread. I need share some data or operate some files. How can I prevent from race conditions. Is there any way can I lock this. Thank you in advance! See in the cookbook: http://aspn.activestate.com/ASPN/search?query=lockingx=0y=0section=PYTHONCKBKtype=Subsection And test/choose one solution... http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/252495 http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/65203 ... A+ Laurent. -- http://mail.python.org/mailman/listinfo/python-list
Getting a class name from within main
Hi, Lets say I have the following class - class MyClass: def __init__(self): print (__name__.split(.))[-1] if __name__ == '__main__': MyClassName = MyClass I can print the name of the class from within the class scope as seen above in the init, but is there any way of printing it from within the main without creating an object of the MyClass type. I need to assign the name of the class within my script, to a variable in main. Thanks, Barry. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python compiled on Windows
Franz Steinhaeusler [EMAIL PROTECTED] wrote: Yes, people have compiled Python with gcc on windows. I believe it is slightly slower than the standard release, but I would guess that may depend on the exact versions of gcc/msc you choose to compare, and the exact compiler options you choose (or I may even be imagining it entirely). I cannot imagine, that there is a decisive difference, especially as in gcc, you have also a couple of options. I did a quick comparison running pystone and taking the best of several runs: On one system which had the Windows Python 2.4 distribution and also Python 2.4 installed under cygwin: Windows Python 2.4: 46k Cygwin Python 2.4: 41k On another system which has a dual boot setup: Windows Python 2.5: 43.7k Ubuntu Python 2.5: 42.0k So in the first case there was about a 12% improvement and in the second case about 5% improvement using the Windows distribution. I don't know whether the gap is closing from improvements in gcc or whether there is an OS related difference as well. Unfortunately cygwin doesn't appear to offer Python 2.5 yet. -- http://mail.python.org/mailman/listinfo/python-list
Re: Getting a class name from within main
[EMAIL PROTECTED] wrote: Hi, Lets say I have the following class - class MyClass: def __init__(self): print (__name__.split(.))[-1] if __name__ == '__main__': MyClassName = MyClass I can print the name of the class from within the class scope as seen above in the init, but is there any way of printing it from within the main without creating an object of the MyClass type. I need to assign the name of the class within my script, to a variable in main. Thanks, Barry. class A: ... pass ... print A.__name__ A -- Robin Becker -- http://mail.python.org/mailman/listinfo/python-list
Re: Getting a class name from within main
In [EMAIL PROTECTED], bg_ie wrote: class MyClass: def __init__(self): print (__name__.split(.))[-1] if __name__ == '__main__': MyClassName = MyClass I can print the name of the class from within the class scope as seen above in the init, but is there any way of printing it from within the main without creating an object of the MyClass type. I need to assign the name of the class within my script, to a variable in main. Yes:: print MyClass.__name__ Ciao, Marc 'BlackJack' Rintsch -- http://mail.python.org/mailman/listinfo/python-list
Re: Python compiled on Windows
On 7 Feb 2007 09:44:32 GMT, Duncan Booth [EMAIL PROTECTED] wrote: Franz Steinhaeusler [EMAIL PROTECTED] wrote: Yes, people have compiled Python with gcc on windows. I believe it is slightly slower than the standard release, but I would guess that may depend on the exact versions of gcc/msc you choose to compare, and the exact compiler options you choose (or I may even be imagining it entirely). I cannot imagine, that there is a decisive difference, especially as in gcc, you have also a couple of options. I did a quick comparison running pystone and taking the best of several runs: On one system which had the Windows Python 2.4 distribution and also Python 2.4 installed under cygwin: Windows Python 2.4: 46k Cygwin Python 2.4: 41k On another system which has a dual boot setup: Windows Python 2.5: 43.7k Ubuntu Python 2.5: 42.0k So in the first case there was about a 12% improvement and in the second case about 5% improvement using the Windows distribution. I don't know whether the gap is closing from improvements in gcc or whether there is an OS related difference as well. Unfortunately cygwin doesn't appear to offer Python 2.5 yet. Hello Duncan, interesting test, so this little gap don't care at all (for me). If the difference would be say 30% or more, than that would make a perceptible difference, I think. -- http://mail.python.org/mailman/listinfo/python-list
Re: Watch folder for new file and execute extern program
BTW-It helps us out here if you let us know what platform you are running on (e.g. Windows, Linux, Mac, etc.). -Larry Sorry... I'm running on windows XP. - Michael -- http://mail.python.org/mailman/listinfo/python-list
Re: huge amounts of pure Python code broken by Python 2.5?
[EMAIL PROTECTED] wrote: John MySQLdb isn't fully supported for Python 2.5 yet, and there's no John tested Windows executable available, although there's an untested John version from a World of Warcraft guild available. As Andy Dustman has pointed out a number of times, he doesn't do Windows. Someone in the MySQLdb community who does use Windows is going to have to fill that void. .. well I have managed to build both extant versions (MySQL-python-1.2.1_p2 MySQL-python-1.2.2b2) from source with the aid of Mr Dustman's comments in the site.cfg files and a very minor hack to the earlier version. I had to have the sources for Mysql available as well, but that probably comes with the territory. It seems the very latest version won't play well with earlier MySQL so I used MySQL-python-1.2.1_p2 as we are still using some 4.0.27 databases. Given that I used a particular version of MySQL, 5.0.33, to build against I'm not certain that my builds are useful for everyone. I copy here the differences I had to make to the source to get stuff to build and run against stock win32 Python-2.5 #MySQL-python-1.2.1_p2 diff -r -c MySQL-python-1.2.1_p2\_mysql.c \tmp\MySQL-python-1.2.1_p2\_mysql.c *** MySQL-python-1.2.1_p2\_mysql.c Wed Apr 05 18:55:44 2006 --- \tmp\MySQL-python-1.2.1_p2\_mysql.c Fri Jan 26 14:01:49 2007 *** *** 2767,2772 --- 2767,2775 return e; } + #define QUOTE(X) _QUOTE(X) + #define _QUOTE(X) #X + static char _mysql___doc__[] = an adaptation of the MySQL C API (mostly)\n\ \n\ *** *** 2801,2811 if (!(dict = PyModule_GetDict(module))) goto error; if (PyDict_SetItemString(dict, version_info, ! PyRun_String(version_info, Py_eval_input, dict, dict))) goto error; if (PyDict_SetItemString(dict, __version__, ! PyString_FromString(__version__))) goto error; if (PyDict_SetItemString(dict, connection, (PyObject *)_mysql_ConnectionObject_Type)) --- 2804,2814 if (!(dict = PyModule_GetDict(module))) goto error; if (PyDict_SetItemString(dict, version_info, ! PyRun_String(QUOTE(version_info), Py_eval_input, dict, dict))) goto error; if (PyDict_SetItemString(dict, __version__, ! PyString_FromString(QUOTE(__version__ goto error; if (PyDict_SetItemString(dict, connection, (PyObject *)_mysql_ConnectionObject_Type)) diff -r -c MySQL-python-1.2.1_p2\site.cfg \tmp\MySQL-python-1.2.1_p2\site.cfg *** MySQL-python-1.2.1_p2\site.cfg Sun Apr 02 18:16:50 2006 --- \tmp\MySQL-python-1.2.1_p2\site.cfg Fri Jan 26 13:48:32 2007 *** *** 16,28 [compiler] #mysql_root: /usr/local/mysql ! #library_dirs: %(mysql_root)s/lib ! #include_dirs: %(mysql_root)s/include ! #libraries: mysqlclient ! # zlib ! # msvcrt ! # libcmt ! # wsock32 ! # advapi32 #extra_compile_args: ! #extra_objects: --- 16,28 [compiler] #mysql_root: /usr/local/mysql ! library_dirs: \tmp\mysql-5.0.33\lib_release ! include_dirs: \tmp\mysql-5.0.33\include ! libraries: mysqlclient ! zlib ! wsock32 ! advapi32 ! #msvcrt ! #libcmt #extra_compile_args: ! extra_objects: /NODEFAULTLIB:MSVCRT #MySQL-python-1.2.2b2 diff -r -c MySQL-python-1.2.2b2\site.cfg \tmp\MySQL-python-1.2.2b2\site.cfg *** MySQL-python-1.2.2b2\site.cfg Wed Apr 05 02:47:02 2006 --- \tmp\MySQL-python-1.2.2b2\site.cfg Wed Jan 17 15:17:59 2007 *** *** 16,28 [compiler] #mysql_root: /usr/local/mysql ! #library_dirs: %(mysql_root)s/lib ! #include_dirs: %(mysql_root)s/include ! #libraries: mysqlclient ! # zlib ! # msvcrt ! # libcmt ! # wsock32 ! # advapi32 #extra_compile_args: ! #extra_objects: --- 16,28 [compiler] #mysql_root: /usr/local/mysql ! library_dirs: \tmp\mysql-5.0.33\lib_release ! include_dirs: \tmp\mysql-5.0.33\include ! libraries: mysqlclient ! zlib ! wsock32 ! advapi32 ! #msvcrt ! #libcmt #extra_compile_args: ! extra_objects: /NODEFAULTLIB:MSVCRT -- Robin Becker -- http://mail.python.org/mailman/listinfo/python-list
Built-in datatypes speed
Hello Python-List I hope somebody can help me with this. I spent some time googling for an answer, but due to the nature of the problem lots of unrelevant stuff shows up. Anyway, I reimplemented parts of TigerSearch ( http://www.ims.uni-stuttgart.de/projekte/TIGER/TIGERSearch/ ) in Python. I am currently writing the paper that goes along with this reimplementation. Part of the paper deals with the differences/similarities in the original Java implementation and my reimplementation. In order to superficially evaluate differences in speed, I used this paper ( http://www.ubka.uni-karlsruhe.de/cgi-bin/psview?document=ira/2000/5format=1 ) as a reference. Now, this is not about speed differences between Java and Python, mind you, but about the speed built-in datatypes (dictionaries, lists etc.) run at. As far as I understood it from the articles and books I read, any method call from these objects run nearly at C-speed (I use this due to lack of a better term), since these parts are implemented in C. Now the question is: a) Is this true? b) Is there a correct term for C-speed and what is it? I would greatly appreciate an answer to that, since this has some impact on the argumentation in the paper. Thanks, Maël PS: For people interested in this reimplementation project: my code will be published here ( http://www.ling.su.se/dali/downloads/treealigner/index.htm ) as soon as it is integrated with the GUI and properly tested. The whole thing is GPLed... -- http://mail.python.org/mailman/listinfo/python-list
Re: division by 7 efficiently ???
[EMAIL PROTECTED] schreef: On Feb 6, 4:54 pm, John Machin [EMAIL PROTECTED] wrote: Recursive? Bzzzt! Might it not be better to halve the interval at each iteration instead of calling a random number function? mid = (lo + hi) 1 looks permitted and cheap to me. Also you don't run the risk of it taking a very high number of iterations to get a result. I had considered this, but to halve, you need to divide by 2. Using random, while potentially increasing the number of iterations, removes the dependency of language tricks and division. It's possible to use Fibonacci numbers instead of halving each time; that requires only addition and subtraction. Unfortunately I forgot exactly how that works, and I don't have the time to look it up or to try to reproduce it now. Maybe later. AFAIK that method is not commonly used since binary computers are very good at dividing numbers by two, but it would be a good method on ternary or decimal computers. -- If I have been able to see further, it was only because I stood on the shoulders of giants. -- Isaac Newton Roel Schroeven -- http://mail.python.org/mailman/listinfo/python-list
Re: division by 7 efficiently ???
Roel Schroeven schreef: [EMAIL PROTECTED] schreef: I had considered this, but to halve, you need to divide by 2. Using random, while potentially increasing the number of iterations, removes the dependency of language tricks and division. It's possible to use Fibonacci numbers instead of halving each time; that requires only addition and subtraction. Unfortunately I forgot exactly how that works, and I don't have the time to look it up or to try to reproduce it now. Maybe later. AFAIK that method is not commonly used since binary computers are very good at dividing numbers by two, but it would be a good method on ternary or decimal computers. Responding to myself since I found an explanation in the obvious place: http://en.wikipedia.org/wiki/Fibonacci_search_technique It is meant for search in ordered arrays though; I don't think it can be adapted for searching in mathematic intervals. -- If I have been able to see further, it was only because I stood on the shoulders of giants. -- Isaac Newton Roel Schroeven -- http://mail.python.org/mailman/listinfo/python-list
Vim search under cursor
Hi, I am using gvim to edit python source files. When I press * or #, I would want to search for the attribute name under the cursor and not the entire string. For example, If I have os.error and pressing * on top of error searches for os.error rather than error. How to set this, any Idea? thanks. - Suresh -- http://mail.python.org/mailman/listinfo/python-list
Re: Graphs, bar charts, etc
On Feb 7, 4:46 am, Joshua J. Kugler [EMAIL PROTECTED] wrote: Jan Danielsson wrote: Hello all, I have some data in a postgresql table which I view through a web interface (the web interface is written in python -- using mod_python under apache 2.2). Now I would like to represent this data as graphs, bar charts, etc. I know about matplotlib, and it seemed like exactly what I was looking for. I tried importing it in my script, but it gave me some error about a home directory not being writable. I'm not sure I like the idea of it require to be able to write somewhere. Am I using it wrong? Hi! Matplotlib saves some stuff into a configuration dir. Take a look at the __init__.py file in site-packages/matplotlib (or where your installation lives). There are several environment variabels checked where a .matplotlib folder will be created. Try unsetting HOME, than probably TMP will be used and this should be writable in any case. I don't know whether the creation of the configuration folder can be turned off. Hope that helps! Bernhard -- http://mail.python.org/mailman/listinfo/python-list
mplayer bug or python bug?
The following code is my test program for control mplayer.
in movies/ there are about 20 movies, the code plays them in circle,
but mplayer will crash silently after a circle, the sliently means I
can handle popen2 without except, but no movie.
I have no idea about it...
Can you help me?
class SimplePlayer( myobject ):
def __init__(self):
self.debug('simple player init ready')
self.is_open = False
self.wfd = None
self.rfd = None
def play(self, file):
if self.is_open:
self.wfd.write('loadfile %s\n' %(file))
self.wfd.flush()
else:
self.wfd, self.rfd = os.popen2('mplayer -loop 0 -slave
-quiet -ao null %s 2 /dev/null' %(file))
self.is_open = True
##
if __name__ == '__main__':
player = SimplePlayer()
all = os.listdir('movies/')
print all
while True:
for current in all:
print current
player.play('movies/' + current)
time.sleep(3)
--
LinuX Power
--
http://mail.python.org/mailman/listinfo/python-list
Re: Python editor
On Feb 6, 11:01 pm, Stef Mientki [EMAIL PROTECTED] wrote: BBands wrote: No, no, no, this is not an invitation to the editor wars. I have been using José Cláudio Faria's superb Tinn-R,http://www.sciviews.org/Tinn-R/, with the R language,http://www.r-project.org/. This editor allows you to send code to the R shell for execution. You can easily send a line, the selection, the balance after the cursor or the whole script. In SPE you can use EditExecute in shell (Shift+Ctrl+E). If there is nothing selected SPE will run the whole script. Stani -- http://mail.python.org/mailman/listinfo/python-list
outlook bar
Hello, I'm trying to make an outlook bar like in python but i'm not at all familiar with ms-outlook and i'm a bit too weak and in early stage of python learning. Has somebody already made or seen the code IN TKINTER(/)PMW for a bar like that ? Thanks very much for all help. Yves -- http://mail.python.org/mailman/listinfo/python-list
ps tkinter
For a bit more help about my previous message (outlook bar) does anybody know how to reparent or change a widget(button)'s owner in tkinter ? here's my code that doesn't work : def inverse(self): if (self.texte==top): self.texte=bottom btn = self btn.pack_forget() btn.configure(parent = self.top, text=self.texte) btn.pack(side=TOP,fill=X,expand=1) else: self.texte=top btn = self btn.pack_forget() btn.configure(parent=self.bottom, text=self.texte) btn.parent = None btn.pack(side=BOTTOM,fill=X,expand=1) -- http://mail.python.org/mailman/listinfo/python-list
Re: Vim search under cursor
On 2007-02-07, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi, I am using gvim to edit python source files. When I press * or #, I would want to search for the attribute name under the cursor and not the entire string. For example, If I have os.error and pressing * on top of error searches for os.error rather than error. How to set this, any Idea? It's will to break things, but you can do this by editing the iskeyword string and adding in the '.'. :h 'iskeyword'. -- Neil Cerutti -- http://mail.python.org/mailman/listinfo/python-list
Re: Vim search under cursor
[EMAIL PROTECTED] wrote: Hi, I am using gvim to edit python source files. When I press * or #, I would want to search for the attribute name under the cursor and not the entire string. For example, If I have os.error and pressing * on top of error searches for os.error rather than error. How to set this, any Idea? Press / then Ctrl-R-A then enter -- of course you should recored it as a macro. w. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python editor
[EMAIL PROTECTED] wrote: On Feb 6, 11:01 pm, Stef Mientki [EMAIL PROTECTED] wrote: BBands wrote: No, no, no, this is not an invitation to the editor wars. I have been using José Cláudio Faria's superb Tinn-R,http://www.sciviews.org/Tinn-R/, with the R language,http://www.r-project.org/. This editor allows you to send code to the R shell for execution. You can easily send a line, the selection, the balance after the cursor or the whole script. In SPE you can use EditExecute in shell (Shift+Ctrl+E). If there is nothing selected SPE will run the whole script. Stani hi Stani, it's hard to get your hands on the SPE editor, bad links, server not available etc. When you finally got it, it crashes a lot (at least at my place). And it's even impossible to get a manual, to see if there's a course for these crashes ;-) I read about a free manual with adds, but I can find it no-where. And before I pay for the real manual, I want to see it running for at least 5 minutes ;-) So despite the potentials of SPE look very good, I keep myself to PyScripter ;-) cheers, Stef -- http://mail.python.org/mailman/listinfo/python-list
Re: Python editor
Maybe you can try ulipad. -- I like python! UliPad The Python Editor: http://wiki.woodpecker.org.cn/moin/UliPad My Blog: http://www.donews.net/limodou -- http://mail.python.org/mailman/listinfo/python-list
Re: How can I use __setitem__ method of dict object?
On Feb 6, 5:10 pm, Bruno Desthuilliers [EMAIL PROTECTED] wrote: jeremito a écrit : On Feb 6, 2:36 pm, Bruno Desthuilliers [EMAIL PROTECTED] wrote: (snip) Here's an alternative implementation, so you get the idea. class Xs(dict): oops ! I meant: class Xs(object): of course... (snip) I guess I just need more experience. Possibly - but not only. You may want to have a look at the FineManual(tm) for all this kind of magic, starting with :http://docs.python.org/ref/specialnames.htmlhttp://docs.python.org/ref/sequence-types.html HTH Thanks again! Sometimes the problem is simply not knowing where to find the documentation, or finding the right portion of the documentation. Your help has been invaluable. Jeremy -- http://mail.python.org/mailman/listinfo/python-list
Re: ps tkinter
On Wed, 07 Feb 2007 13:40:33 +0100, yvesd [EMAIL PROTECTED] wrote: For a bit more help about my previous message (outlook bar) does anybody know how to reparent or change a widget(button)'s owner in tkinter ? here's my code that doesn't work : def inverse(self): if (self.texte==top): self.texte=bottom btn = self btn.pack_forget() btn.configure(parent = self.top, text=self.texte) btn.pack(side=TOP,fill=X,expand=1) else: self.texte=top btn = self btn.pack_forget() btn.configure(parent=self.bottom, text=self.texte) btn.parent = None btn.pack(side=BOTTOM,fill=X,expand=1) Short answer: you can't. At tcl level, the name for the button contains the name of its parent, and you basically can't rename a button. But, having no idea about what you call an outlook bar since I never used outlook in my whole life, another solution may exist, not requiring to reparent an existing widget. If you only describe exactly what you're trying to do, someone may be able to provide far better help. -- python -c print ''.join([chr(154 - ord(c)) for c in 'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-']) -- http://mail.python.org/mailman/listinfo/python-list
Re: python for web programming
Thanks a lot. -- http://mail.python.org/mailman/listinfo/python-list
Re: Can Parallel Python run on a muti-CPU server ?
[EMAIL PROTECTED] wrote: [EMAIL PROTECTED] wrote: Hi all, I'm interested in Parallel Python and I learned from the website of Parallel Python that it can run on SMP and clusters. But can it run on a our muti-CPU server ? We are running an origin3800 server with 128 CPUs. Thanks. I have tested that at least it could run sum_primes.py on our server. But it seems Parallel Python just launch one python process for each job, and if I let it use 12 CPUs for 8 jobs, Parallel Python launches 12 python processes, 4 of which just sleep until all 8 jobs are done. I've just downloaded it ,having a couple of M-CPU machines, it's quite interesting. At this moment I think that you should not see it as 'magical distribution' of your processing pool but more like the way threads work. So every function will stay on it's CPU while executing and will not use the process power of another CPU if available. So I guess you have to fine grain your program to take the advantage of multiple CPU's, just like you would do if you had 'real' threads. -- mph -- http://mail.python.org/mailman/listinfo/python-list
http://www.freeanything4you.com/
http://www.freeanything4you.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: outlook bar
yvesd wrote: Hello, I'm trying to make an outlook bar like in python but i'm not at all familiar with ms-outlook and i'm a bit too weak and in early stage of python learning. Has somebody already made or seen the code IN TKINTER(/)PMW for a bar like that ? I've not done such a thing, however I investigated the possibility to create an IE-Bar - and based on that I assume you can't do that in Tkinter at all. You need native windows controls for that, and some COM-stuff for registering and interacting. So at least you need the win32-extensions from Mark Hammond, but maybe quite a bit more. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Partial 1.0 - Partial classes for Python
Martin v. Löwis schrieb: I'm happy to announce partial 1.0; a module to implement partial classes in Python. It is available from http://cheeseshop.python.org/pypi/partial/1.0 A partial class is a fragment of a class definition; partial classes allow to spread the definition of a class over several modules. One location serves as the original definition of the class. To extend a class original_module.FullClass with an additional function, one writes from partial import * import original_module class ExtendedClass(partial, original_module.FullClass): def additional_method(self, args): body more_methods This module is licensed under the Academic Free License v3.0. Please send comments and feedback to [EMAIL PROTECTED] Nice idea. I had to apply this change to make it work, though: diff -u c:\python25\lib\site-packages\partial-1.0-py2.5.egg\partial.py.orig c:\python25\lib\site-packages\partial-1.0-py2.5.egg\partial.py --- c:\python25\lib\site-packages\partial-1.0-py2.5.egg\partial.py.orig Wed Feb 07 13:47:55 2007 +++ c:\python25\lib\site-packages\partial-1.0-py2.5.egg\partial.py Wed Feb 07 13:47:55 2007 @@ -36,7 +36,7 @@ continue if k in base.__dict__ and not hasattr(v, '__replace'): raise TypeError, %s already has %s % (repr(base), k) -base.__dict__[k] = v +setattr(base, k, v) # Return the original class return base otherwise I get this: Traceback (most recent call last): File stdin, line 1, in module File c:\python25\lib\site-packages\partial-1.0-py2.5.egg\partial.py, line 39, in __new__ base.__dict__[k] = v TypeError: Error when calling the metaclass bases 'dictproxy' object does not support item assignment IIUC, wouldn't be 'partial.extend' or something like that be a better name for the base class? Thanks, Thomas -- http://mail.python.org/mailman/listinfo/python-list
Re: Graphs, bar charts, etc
On Feb 6, 7:57 am, Jan Danielsson [EMAIL PROTECTED] wrote: Hello all, I have some data in a postgresql table which I view through a web interface (the web interface is written in python -- using mod_python under apache 2.2). Now I would like to represent this data as graphs, bar charts, etc. I know about matplotlib, and it seemed like exactly what I was looking for. I tried importing it in my script, but it gave me some error about a home directory not being writable. I'm not sure I like the idea of it require to be able to write somewhere. Am I using it wrong? Is there something else I can use which can produce graphs easily? -- Kind regards, Jan Danielsson You might want to look at RPy (http://rpy.sourceforge.net), an interface to R (statistical programming environment). Sean -- http://mail.python.org/mailman/listinfo/python-list
Group Membership in Active Directory Query
I am trying to write a script to simply query the group members in an
active directory group. I need to use LDAP to make sure I capture any
global global group nestings that may occur. I already have a
function that uses WinNT provider to capture this info from NT4 or AD
domains and it works beautifully. It just doesn't capture global
global nestings. I am having great difficulties in getting this to
work on AD though with ldap. I have a multiple domain tree
environment and need to be able to query groups in different domains.
I want to simply make an ldap connection, bind to it, search for the
group and get it's members.
I do the following for eDirectory and it works great but not in AD.
import ldap
l=ldap.open(1.2.3.4,trace_level = 1)
l.simple_bind_s('cn=username,ou=company','password')
UserRes = UserRes + l.search_s(
o=company,
ldap.SCOPE_SUBTREE, (|'cn=groupname')
If I do the same thing as above but to an AD source it doesn't work.
I run the open and it seems successful, I run the bind using DN, UPN,
or domain name and password and it seems to bind, I run the query and
it says I must complete a successfull bind operation before doing a
query.
Any help is appreciated.
--
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Running Application Within Emacs
My editor is emacs in linux, and I have the python mode enabled. The two menus -- IM-Python and Python -- allow me to navigate within the loaded module and open execute buffers, among other things. But, I don't see a way to run a wxPython application from within the editor as I would from the command line. Is this possible? If so, how? Ric -- http://mail.python.org/mailman/listinfo/python-list
wxPython running other applications or console
Is it possible to run another application like vim or a terminal window from within a wxPython frame? -- http://mail.python.org/mailman/listinfo/python-list
Re: Group Membership in Active Directory Query
On Feb 7, 9:22 am, [EMAIL PROTECTED] wrote:
I am trying to write a script to simply query the group members in an
active directory group. I need to use LDAP to make sure I capture any
global global group nestings that may occur. I already have a
function that uses WinNT provider to capture this info from NT4 or AD
domains and it works beautifully. It just doesn't capture global
global nestings. I am having great difficulties in getting this to
work on AD though with ldap. I have a multiple domain tree
environment and need to be able to query groups in different domains.
I want to simply make an ldap connection, bind to it, search for the
group and get it's members.
I do the following for eDirectory and it works great but not in AD.
import ldap
l=ldap.open(1.2.3.4,trace_level = 1)
l.simple_bind_s('cn=username,ou=company','password')
UserRes = UserRes + l.search_s(
o=company,
ldap.SCOPE_SUBTREE, (|'cn=groupname')
If I do the same thing as above but to an AD source it doesn't work.
I run the open and it seems successful, I run the bind using DN, UPN,
or domain name and password and it seems to bind, I run the query and
it says I must complete a successfull bind operation before doing a
query.
Any help is appreciated.
I found an example in the groups here and attempted it but it failed
as well. Below is the code I used and the results.
import ldap, ldapurl
proto = 'ldap'
server = 'domaincontroller.domain.company.com'
port = 389
url = ldapurl.LDAPUrl(urlscheme=proto,
hostport=%s:%s % (server,
str(port))).initializeUrl()
ldap_obj = ldap.initialize(url)
# !!!password will be on wire in plaintext!!!
ldap_obj = ldap_obj.simple_bind_s('[EMAIL PROTECTED]',
'password')
base = 'DC=DOMAIN, DC=COMPANY, DC=COM'
scope = ldap.SCOPE_SUBTREE
query = '(objectclass=user)'
res_attrs = ['*']
res = ldap_obj.search_ext_s(base, scope, query, res_attrs)
print res
RESULTS FROM PYTHON SHELL
res=ldap_obj.search_ext_s(base, scope, query, rest_attrs)
AttributeError: 'NoneType' object has no attribute 'search_Ext_s'
--
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Re: How can I use __setitem__ method of dict object?
On Feb 7, 8:28 am, jeremito [EMAIL PROTECTED] wrote: On Feb 6, 5:10 pm, Bruno Desthuilliers [EMAIL PROTECTED] wrote: jeremito a écrit : On Feb 6, 2:36 pm, Bruno Desthuilliers [EMAIL PROTECTED] wrote: (snip) Here's an alternative implementation, so you get the idea. class Xs(dict): oops ! I meant: class Xs(object): of course... (snip) I guess I just need more experience. Possibly - but not only. You may want to have a look at the FineManual(tm) for all this kind of magic, starting with :http://docs.python.org/ref/specialnames.htmlhttp://docs.python.org/re... HTH Thanks again! Sometimes the problem is simply not knowing where to find the documentation, or finding the right portion of the documentation. Your help has been invaluable. Jeremy One more question. I will be asking for the value of cs.xT *many* (~millions) times. Therefore I don't want it's value to be calculated on the fly. How can I set the value of xT whenever xS, xF, or xG are changed, but not allow it to be set directly? From the example given previously, it seems like it can't be done this way. Thans, Jeremy -- http://mail.python.org/mailman/listinfo/python-list
Re: Partial 1.0 - Partial classes for Python
On Feb 7, 8:51 am, Thomas Heller [EMAIL PROTECTED] wrote: Martin v. Löwis schrieb: I'm happy to announce partial 1.0; a module to implement partial classes in Python. It is available from http://cheeseshop.python.org/pypi/partial/1.0 A partial class is a fragment of a class definition; partial classes allow to spread the definition of a class over several modules. One location serves as the original definition of the class. To extend a class original_module.FullClass with an additional function, one writes from partial import * import original_module class ExtendedClass(partial, original_module.FullClass): def additional_method(self, args): body more_methods This module is licensed under the Academic Free License v3.0. Please send comments and feedback to [EMAIL PROTECTED] Nice idea. Indeed. I was going to make a post asking for advice on high-level delegation (basically you have a generic mostly-OO framework, which the user extends mostly by subclassing, but how do the generic classes know about the user-extened classes?). I knew of many solutions, but all had significant drawbacks. But this seems like it'd work great, maybe with a few minor inconveniences but nothing like the icky hacks I've been using. Ironic, since I myself posted a very simple example of how to do this with a class hook here on c.l.python a while back. But I'll have to review the license and see how it works with what I have. Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
python sub interpreter
Hello, I want to have a python interpreter shell spawn from a python class member function. atm I use exec but I want something more flexible (i.e. syntax checking while typing) E.g.: class blah: def start_shell(self): import sys dbg=self str= while str != 'exit': exec str print 'pydbg', str=sys.stdin.readline() etc. Somebody knows if something like this has been done before or an easy way to go about this? Regards, Thomas -- http://mail.python.org/mailman/listinfo/python-list
Re: Calling J from Python
On Feb 6, 9:08 pm, [EMAIL PROTECTED] wrote: Gosi: There are a number of graphics examples, utilities and demos you can use in J and combine it with Python. Some of those graphic examples are very nice, I have seen a big site filled with complex fractals, chaotic attractors, etc. Python Zen seems somewhat opposed to part of the J spirit, that's why it's not easy to advertise J in this newsgroup. Python is open source, and it values readability, it belives that it's better to write more and be more readable/debuggable, than to be able to express many things with few symbols. APL was an interesting language, powerful too, and J looks more keyboard-friendly and it's probably better for other things too. K seems even less readable than J to me. Probably J has to be compared more to scipy than to Python itself, because they share some purposes, the vector/matrix processing. If you need to do lot of array processing the syntax of scipy (with the help of MatPlotLib too, that's partially copied from MatLab) isn't (may be not) high-level enough, the system isn't able to simplify things by itself, etc. So in that situation a more functional language may be fitter (maybe even F#, but probably there are better languages around for that purpose, some modern ones coming from ML family). Bye, bearophile Ken Iverson created APL and it ran first time on a computer 1966. Ken Iverson then corrected several things and made it so different that he could no longer use the name and the results was J around 1990. J can be very short and effective. I like to use J for many things and I think that combining Python and J is a hell of a good mixture. -- http://mail.python.org/mailman/listinfo/python-list
Re: Partial 1.0 - Partial classes for Python
On Feb 7, 10:17 am, Carl Banks [EMAIL PROTECTED] wrote: On Feb 7, 8:51 am, Thomas Heller [EMAIL PROTECTED] wrote: Martin v. Löwis schrieb: I'm happy to announce partial 1.0; a module to implement partial classes in Python. It is available from http://cheeseshop.python.org/pypi/partial/1.0 A partial class is a fragment of a class definition; partial classes allow to spread the definition of a class over several modules. One location serves as the original definition of the class. To extend a class original_module.FullClass with an additional function, one writes from partial import * import original_module class ExtendedClass(partial, original_module.FullClass): def additional_method(self, args): body more_methods This module is licensed under the Academic Free License v3.0. Please send comments and feedback to [EMAIL PROTECTED] Nice idea. Indeed. I was going to make a post asking for advice on high-level delegation (basically you have a generic mostly-OO framework, which the user extends mostly by subclassing, but how do the generic classes know about the user-extened classes?). I knew of many solutions, but all had significant drawbacks. But this seems like it'd work great, maybe with a few minor inconveniences but nothing like the icky hacks I've been using. Ironic, since I myself posted a very simple example of how to do this with a class hook here on c.l.python a while back. And looking back at that post, I said that using such a hack would be truly evil. To every thing there is a season Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
Re: Calling J from Python
In [EMAIL PROTECTED], Gosi wrote: I like to use J for many things and I think that combining Python and J is a hell of a good mixture. I was able to follow this sentence up to and including the word hell… :-) Ciao, Marc 'BlackJack' Rintsch -- http://mail.python.org/mailman/listinfo/python-list
Re: Partial 1.0 - Partial classes for Python
Martin v. Löwis schrieb: I'm happy to announce partial 1.0; a module to implement partial classes in Python. It is available from http://cheeseshop.python.org/pypi/partial/1.0 A partial class is a fragment of a class definition; partial classes allow to spread the definition of a class over several modules. One location serves as the original definition of the class. This looks the same as Ruby classes, right? I don't like class definitions to be scattered in different files, for the same reason I don't like excessive inheritance, it is too easy to get lost when debugging code written by somebody else. But probably I am just overreacting due to my exposure to Zope ... Michele Simionato -- http://mail.python.org/mailman/listinfo/python-list
Socket and array
Hello, How to send an array via socket to the other end?Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Object type check
Hi to all, in statically-types languages, let's say C# for example, we use polymorphism through interfaces. So we define an interface I with method M and then a class C that implements I interface and write code for the M method. So, if we have a function that takes a parameter of type I, we know before-hand that it will have an M method to call. But in dynamic languages this is not the case and we can pass whatever we want to that function. Assuming that someone writes a library in Python that other programmers will use, what is the correct way to check inside that function if the parameter passed is of the correct type, maybe isinstance BIF ? Thanks in advance! -- http://mail.python.org/mailman/listinfo/python-list
Re: multithreading concept
On Feb 7, 2:53 am, S.Mohideen [EMAIL PROTECTED] wrote: Python is praised about - me too. But at one instance it fails. It fails to behave as a true multi-threaded application. That means utilizing all the CPUs parallely in the SMP efficiently stays as a dream for a Python Programmer. This has been discussed to death before. Win32 threads and pthreads (which is what Python normally uses, depending on the platform) are designed to stay idle most of the time. They are therefore not a tool for utilizing the power of multiple CPUs, but rather make certain kind of programming tasks easier to program (i.e. non-blocking I/O, responsive UIs). The GIL is not a problem in this context. If threads stay idle most of the time, the GIL does not harm. If you want to utilize the computing power of multiple CPUs, you should use multiple processes instead of threads. On Python this is mandatory due to the GIL. In any other language it it highly recommended. The de-factor standard for parallel multiprocessing (MPI) uses multiple processes, even on SMPs. Anyone with serious intentions of using multiple processors for parallel computing should use multiple processes and fast IPC - not multiple threads, shared memory and synchronization objects - even if the language is plain C. With multiple threads, a lot of time is wasted doing context switches and book keeping for the thread synchronization. In addition, obscure and often very difficult to identify bugs are introduced. There are a Python binding for MPI (mpi4py) and a similar pure Python project (Parallel Python) that will take care of all these details for you. Discussion threads say its due to GIL - global interpreter lock. But nobody has mentioned any alternative to that apart from suggestions like Code it in C and POSH (http://poshmodule.sf.net). Is there any other way we can make Python programs really multithreaded in real sense. As mentioned, use MPI or Parallel Python. MPI is by far the more mature, but Parallel Python could be easier for a pythoneer. Multithreading has different use. -- http://mail.python.org/mailman/listinfo/python-list
Re: Object type check
The answer is to do nothing at all. Use the interfaces of the objects that you expect. Treat them like numbers if you expect them to be, or stirngs, or iterables. Call methods and access attributes you expect to be there. If the caller passes sometihng bad, and something doesn't work, they'll find out about it and consult your documentation to see what they did wrong. Dont restrict them to particular types. You would not restrict them to a particular class in C#. Instead, you define the interfaces simply by how you use the objects. This is called duck typing (http://en.wikipedia.org/wiki/Duck_typing) which states If it walks like a duck and it quacks like a duck, it must be a duck. In the end, isn't that what matters to you? Not the type or defined interfaces of an object, but that it does what you expect. On 7 Feb 2007 08:17:55 -0800, king kikapu [EMAIL PROTECTED] wrote: Hi to all, in statically-types languages, let's say C# for example, we use polymorphism through interfaces. So we define an interface I with method M and then a class C that implements I interface and write code for the M method. So, if we have a function that takes a parameter of type I, we know before-hand that it will have an M method to call. But in dynamic languages this is not the case and we can pass whatever we want to that function. Assuming that someone writes a library in Python that other programmers will use, what is the correct way to check inside that function if the parameter passed is of the correct type, maybe isinstance BIF ? Thanks in advance! -- http://mail.python.org/mailman/listinfo/python-list -- Read my blog! I depend on your acceptance of my opinion! I am interesting! http://ironfroggy-code.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: multithreading concept
On 7 Feb, 02:53, S.Mohideen [EMAIL PROTECTED] wrote: Python is praised about - me too. But at one instance it fails. It fails to behave as a true multi-threaded application. That means utilizing all the CPUs parallely in the SMP efficiently stays as a dream for a Python Programmer. Take a look at the Python Wiki for information on parallel processing with Python: http://wiki.python.org/moin/ParallelProcessing Pure CPython code may not be able to use more than one CPU merely through the use of threads (Jython and IronPython are different, though), but using all the CPUs or cores in an SMP system is not exactly a mere dream, as many of the projects listed on the above page demonstrate. Paul -- http://mail.python.org/mailman/listinfo/python-list
(n)curses or tcl/tk?
Hi All, Just learning Python - my first new language for about 18 years (I'm not a programmer ...). I'm writing a small utility to manipulate some text files (for the game VGA Planets, if you're interested: http:// www.phost.de). It's currently working, but it looks a bit ugly with raw_input and just basic text output. I have plans to expand the functions of the utility, and I want a simple GUI frontend. I assumed I'd end up with something that looks a bit like the Debian installer: a curses-driven thing with simple ascii boxes and buttons. But reading a bit more about Python makes me think that support for tcl/tk is much more developed than support for curses. So my question is, should I go to the trouble of learning how to make boxes and stuff using tcl/tk, or just go with ncurses as I imagined? Which is more portable? The basic idea is that this just runs on the largest possible variety of systems (er, assuming they have Python installed, of course). I use Debian mostly, but of course it needs to run on bog-standard Windows boxes. Does that tilt the balance in favour of curses or tcl/tk? Or should I just stick with ugly text? Thanks for all your help, CC (noob) -- http://mail.python.org/mailman/listinfo/python-list
Re: Partial 1.0 - Partial classes for Python
On Feb 7, 10:48 am, Michele Simionato [EMAIL PROTECTED] wrote: Martin v. Löwis schrieb: I'm happy to announce partial 1.0; a module to implement partial classes in Python. It is available from http://cheeseshop.python.org/pypi/partial/1.0 A partial class is a fragment of a class definition; partial classes allow to spread the definition of a class over several modules. One location serves as the original definition of the class. This looks the same as Ruby classes, right? I don't like class definitions to be scattered in different files, for the same reason I don't like excessive inheritance, it is too easy to get lost when debugging code written by somebody else. But probably I am just overreacting due to my exposure to Zope ... The big difference from Ruby is that this can't extend most built- ins. Which means that a lot of Ruby horror stories wouldn't apply. Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
Re: Partial 1.0 - Partial classes for Python
Carl Banks schrieb: On Feb 7, 10:17 am, Carl Banks [EMAIL PROTECTED] wrote: On Feb 7, 8:51 am, Thomas Heller [EMAIL PROTECTED] wrote: Martin v. Löwis schrieb: I'm happy to announce partial 1.0; a module to implement partial classes in Python. It is available from http://cheeseshop.python.org/pypi/partial/1.0 A partial class is a fragment of a class definition; partial classes allow to spread the definition of a class over several modules. One location serves as the original definition of the class. To extend a class original_module.FullClass with an additional function, one writes from partial import * import original_module class ExtendedClass(partial, original_module.FullClass): def additional_method(self, args): body more_methods This module is licensed under the Academic Free License v3.0. Please send comments and feedback to [EMAIL PROTECTED] Nice idea. Indeed. I was going to make a post asking for advice on high-level delegation (basically you have a generic mostly-OO framework, which the user extends mostly by subclassing, but how do the generic classes know about the user-extened classes?). I knew of many solutions, but all had significant drawbacks. But this seems like it'd work great, maybe with a few minor inconveniences but nothing like the icky hacks I've been using. Ironic, since I myself posted a very simple example of how to do this with a class hook here on c.l.python a while back. And looking back at that post, I said that using such a hack would be truly evil. To every thing there is a season Do you have a pointer to that post? Thomas -- http://mail.python.org/mailman/listinfo/python-list
Re: Object type check
On Feb 7, 5:17 pm, king kikapu [EMAIL PROTECTED] wrote: Hi to all, in statically-types languages, let's say C# for example, we use polymorphism through interfaces. So we define an interface I with method M and then a class C that implements I interface and write code for the M method. So, if we have a function that takes a parameter of type I, we know before-hand that it will have an M method to call. But in dynamic languages this is not the case and we can pass whatever we want to that function. Assuming that someone writes a library in Python that other programmers will use, what is the correct way to check inside that function if the parameter passed is of the correct type, maybe isinstance BIF ? Usually, you don't check anything at all. However, in some cases, it may make sense to check that you passed the right object. For instance if you have the container class Example(object): def __init__(self, innerobj): self.innerobj = innerobj def amethod(self): self.innerobj.amethod() ex = Example(None) you will get an error only when calling ex.amethod(). If you are going to call ex.amethod() one hour after instantiation, you will get the error too late. So, it makes sense to put a check in the __init__ method, something like assert hasattr(self.innerobj, 'amethod') in order to get an error message as soon as possible. Notice that checking for the existance of the needed method is better than using isinstance, since it gives you much more freedom for innerobj. Do not require more than you need. HTH, Michele Simionato -- http://mail.python.org/mailman/listinfo/python-list
Re: Group Membership in Active Directory Query
[EMAIL PROTECTED] schrieb:
ldap_obj = ldap_obj.simple_bind_s('[EMAIL PROTECTED]',
'password')
AttributeError: 'NoneType' object has no attribute 'search_Ext_s'
dummy = ldap_obj.simple_bind_s('[EMAIL PROTECTED]',
'password')
or better simply
ldap_obj.simple_bind_s('[EMAIL PROTECTED]',
'password')
--
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Re: Object type check
Dont restrict them to particular types. You would not restrict them to a particular class in C#. Instead, you define the interfaces simply by how you use the objects. Of cource i restrict them to particular types! In C# you cannot pass something bad this way because the compiler will just catch it! I see what you mean by duck typing. So you suggest the do nothing at all direction, better document my code so other can see what is expected, right ? -- http://mail.python.org/mailman/listinfo/python-list
Re: Object type check
On 7 Feb 2007 08:59:12 -0800, king kikapu [EMAIL PROTECTED] wrote: Dont restrict them to particular types. You would not restrict them to a particular class in C#. Instead, you define the interfaces simply by how you use the objects. Of cource i restrict them to particular types! In C# you cannot pass something bad this way because the compiler will just catch it! No, you restrict the interfaces, in your example, not the classes. It is the same in python, but the interfaces are implicitly defined by how you use the objects. I see what you mean by duck typing. So you suggest the do nothing at all direction, better document my code so other can see what is expected, right ? Yes. Also, remember that this means if you write code to expect a dictionary, any mapping type that supports the operations and methods you use will work transparently, allowing your code to be much more flexible. -- Read my blog! I depend on your acceptance of my opinion! I am interesting! http://ironfroggy-code.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Object type check
Of cource i restrict them to particular types! In C# you cannot pass something bad this way because the compiler will just catch it! And you cant pass something 'good' that immitates another object interface (a file-like object for example) I see what you mean by duck typing. So you suggest the do nothing at all direction, better document my code so other can see what is expected, right ? I would add UnitTests to it. -- EduardoOPadoan (eopadoan-altavix::com) -- http://mail.python.org/mailman/listinfo/python-list
Re: Partial 1.0 - Partial classes for Python
Thomas Heller wrote: Do you have a pointer to that post? I think that he was refering to this post: http://mail.python.org/pipermail/python-list/2006-December/416241.html If you are interested in various implementations there is also this: http://mail.python.org/pipermail/python-list/2006-August/396835.html and a module from PyPy: http://mail.python.org/pipermail/python-dev/2006-July/067501.html which was moved to a new location: https://codespeak.net/viewvc/pypy/dist/pypy/tool/pairtype.py?view=markup Ziga -- http://mail.python.org/mailman/listinfo/python-list
Re: (n)curses or tcl/tk?
As far as I know Windows does not support ncurses natively (using CygWin probably changes that). So go with Tkinter. Looks crappy but at least it should run on all major platforms... Hi All, Just learning Python - my first new language for about 18 years (I'm not a programmer ...). I'm writing a small utility to manipulate some text files (for the game VGA Planets, if you're interested: http:// www.phost.de). It's currently working, but it looks a bit ugly with raw_input and just basic text output. I have plans to expand the functions of the utility, and I want a simple GUI frontend. I assumed I'd end up with something that looks a bit like the Debian installer: a curses-driven thing with simple ascii boxes and buttons. But reading a bit more about Python makes me think that support for tcl/tk is much more developed than support for curses. So my question is, should I go to the trouble of learning how to make boxes and stuff using tcl/tk, or just go with ncurses as I imagined? Which is more portable? The basic idea is that this just runs on the largest possible variety of systems (er, assuming they have Python installed, of course). I use Debian mostly, but of course it needs to run on bog-standard Windows boxes. Does that tilt the balance in favour of curses or tcl/tk? Or should I just stick with ugly text? Thanks for all your help, CC (noob) -- http://mail.python.org/mailman/listinfo/python-list
Re: (n)curses or tcl/tk?
Hi, you could try wxpython and the wxglade toolkit for building gui Regards, Thomas On 7 Feb 2007 08:35:41 -0800, magnate [EMAIL PROTECTED] wrote: Hi All, Just learning Python - my first new language for about 18 years (I'm not a programmer ...). I'm writing a small utility to manipulate some text files (for the game VGA Planets, if you're interested: http:// www.phost.de). It's currently working, but it looks a bit ugly with raw_input and just basic text output. I have plans to expand the functions of the utility, and I want a simple GUI frontend. I assumed I'd end up with something that looks a bit like the Debian installer: a curses-driven thing with simple ascii boxes and buttons. But reading a bit more about Python makes me think that support for tcl/tk is much more developed than support for curses. So my question is, should I go to the trouble of learning how to make boxes and stuff using tcl/tk, or just go with ncurses as I imagined? Which is more portable? The basic idea is that this just runs on the largest possible variety of systems (er, assuming they have Python installed, of course). I use Debian mostly, but of course it needs to run on bog-standard Windows boxes. Does that tilt the balance in favour of curses or tcl/tk? Or should I just stick with ugly text? Thanks for all your help, CC (noob) -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: (n)curses or tcl/tk?
On Feb 7, 5:35 pm, magnate [EMAIL PROTECTED] wrote: So my question is, should I go to the trouble of learning how to make boxes and stuff using tcl/tk, or just go with ncurses as I imagined? If you want to use curses on windows with python you need to install WCurses first. Other then that it is very portable. After you get used to it curses is also quite easy to use, however tk has a more features. Depends on what you want to do. I would have used curses in your position because it is easy to use (although tk is no rocket science either) and I like apps that can run on a terminal emulator. Ido. -- http://mail.python.org/mailman/listinfo/python-list
Re: multithreading concept
sturlamolden wrote: On Feb 7, 2:53 am, S.Mohideen [EMAIL PROTECTED] wrote: This has been discussed to death before. Win32 threads and pthreads (which is what Python normally uses, depending on the platform) are designed to stay idle most of the time. They are therefore not a tool for utilizing the power of multiple CPUs, but rather make certain kind of programming tasks easier to program (i.e. non-blocking I/O, responsive UIs). Multithread compute-bound programs on multiple CPUs are how you get heavy number-crunching work done on multiprocessors. Of course, that's not something you use Python for, at least not until it gets a real compiler. It's also the direction games are going. The XBox 360 forced game developers to go that way, since it's a 3-CPU shared memory multiprocessor. That translates directly to multicore desktops and laptops. I went to a talk at Stanford last week by one of Intel's CPU architects, and he said we're going have hundreds of CPUs per chip reasonably soon. Python needs to get ready. John Nagle -- http://mail.python.org/mailman/listinfo/python-list
Re: Socket and array
On 07/02/07, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: How to send an array via socket to the other end?Thanks. What you want is a serialisation solution - turning objects into a string format, and vice versa. Python provides a system for this in its standard library, in the pickle module. Some pseudocode might look like: #sender import pickle socket_send(pickle.dumps(my_list)) #receiver import pickle my_list = pickle.loads(read_all_socket_data()) However, this should only be used if you trust where the data is coming from; with untrusted data, a more restrictive format (such as JSON, perhaps, or a similar lightweight notation system if you are only sending lists) would be a good idea. --Sam -- http://mail.python.org/mailman/listinfo/python-list
what is wrong with my python code?
I got feed back saying list object is not callable. But I can't figure out what is wrong with my code. A=[3,5,4,9,6,7] l=len(A)-1 for i in range(l): print A(i) -- http://mail.python.org/mailman/listinfo/python-list
Re: Running long script in the background
On Feb 6, 8:26 am, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hello, I am trying to write a python cgi that calls a script over ssh, the problem is the script takes a very long time to execute so Apache makes the CGI time out and I never see any output. The script is set to print a progress report to stdout every 3 seconds but I never see any output until the child process is killed. Here's what I have in my python script: command = ssh -l root %s /scripts/xen/xen-create-win-vps1.sh %s % (host, domuname) output = os.popen(command) for line in output: print line.strip() Here's a copy of the bash script. http://watters.ws/script.txt I also tried using os.spawnv to run ssh in the background and nothing happens. Does anybody know a way to make output show in real time? Just a little note: os.popen has been replaced by the subprocess module. ;D -- http://mail.python.org/mailman/listinfo/python-list
Re: what is wrong with my python code?
Dongsheng Ruan [EMAIL PROTECTED] writes: for i in range(l): print A(i) Use square brackets, A[i]. Usually we'd write such a loop like this: for x in A: print x -- http://mail.python.org/mailman/listinfo/python-list
Re: How can I use __setitem__ method of dict object?
jeremito kirjoitti:
On Feb 7, 8:28 am, jeremito [EMAIL PROTECTED] wrote:
On Feb 6, 5:10 pm, Bruno Desthuilliers
[EMAIL PROTECTED] wrote:
jeremito a écrit :
On Feb 6, 2:36 pm, Bruno Desthuilliers [EMAIL PROTECTED] wrote:
(snip)
Here's an alternative implementation, so you get the idea.
class Xs(dict):
oops ! I meant:
class Xs(object):
of course...
(snip)
I guess I just
need more experience.
Possibly - but not only. You may want to have a look at the
FineManual(tm) for all this kind of magic, starting with
:http://docs.python.org/ref/specialnames.htmlhttp://docs.python.org/re...
HTH
Thanks again! Sometimes the problem is simply not knowing where to
find the documentation, or finding the right portion of the
documentation. Your help has been invaluable.
Jeremy
One more question. I will be asking for the value of cs.xT *many*
(~millions) times. Therefore I don't want it's value to be calculated
on the fly. How can I set the value of xT whenever xS, xF, or xG are
changed, but not allow it to be set directly? From the example given
previously, it seems like it can't be done this way.
Thans,
Jeremy
I'm certainly no wizard in timing, but here goes:
Using the class definition given to you by Bruno, adding the following
to the end (and 'import timeit' at the start):
#
lst = timeit.Timer('for i in xrange(10): xx=xs.xT', \
'from __main__ import Xs;xs = Xs()').repeat(100,1000)
lst.sort()
print lst
print 'Average:', sum(lst)/100
#
I get the output:
[0.017246605364648282, 0.01727426251101738, 0.017275659336591698,
0.017290745052793044, 0.01733264982001903, 0.017347735536220377,
and so on ...
0.029063749722380933, 0.029163762433493667, 0.029422733894950315,
0.029790378386079785]
Average: 0.0182474979362
Thus: A 1000 assignments take a little over 18 milliseconds. The largest
values in the list are probably caused bu GC occurring. But even 30 ms /
1000 iterations i.e. 30 microseconds per fetch seems to be fast enough.
All this depends of course on the computer used. Mine is on the fast
side, you might test it on your PC.
The correct way of programming is to find a good simple algorithm and
the data structures needed, to program a clean solution with them and
then when you've got a correctly operating application and THEN IF you
need speed try to do something about it.
Premature optimization is the worst evil or something like that is how
the saying goes.
Hopefully I'm not leading you astray by being a novice in using the
timeit module.
HTH,
Jussi
--
http://mail.python.org/mailman/listinfo/python-list
Re: what is wrong with my python code?
On Wednesday 07 February 2007 12:43:34 Dongsheng Ruan wrote: I got feed back saying list object is not callable. But I can't figure out what is wrong with my code. for i in range(l): print A(i) You're calling A, when you want to access one of its elements: use the straight brackets [ for i in range(l): print A[i] -- http://mail.python.org/mailman/listinfo/python-list
Why doesn't my heapify work?
I want to turn an Array into a heap, but my code just doesn't work: no change after execution. A=[3,5,4,9,6,7] m=len(A)-1 for i in range(m,1): t=(i-1)/2 if A[i]A[t]: A[i],A[t]=A[t],A[i] -- http://mail.python.org/mailman/listinfo/python-list
Re: multithreading concept
John Nagle wrote: sturlamolden wrote: On Feb 7, 2:53 am, S.Mohideen [EMAIL PROTECTED] wrote: This has been discussed to death before. Win32 threads and pthreads (which is what Python normally uses, depending on the platform) are designed to stay idle most of the time. They are therefore not a tool for utilizing the power of multiple CPUs, but rather make certain kind of programming tasks easier to program (i.e. non-blocking I/O, responsive UIs). Multithread compute-bound programs on multiple CPUs are how you get heavy number-crunching work done on multiprocessors. Of course, that's not something you use Python for, at least not until it gets a real compiler. It's also the direction games are going. The XBox 360 forced game developers to go that way, since it's a 3-CPU shared memory multiprocessor. That translates directly to multicore desktops and laptops. I went to a talk at Stanford last week by one of Intel's CPU architects, and he said we're going have hundreds of CPUs per chip reasonably soon. Python needs to get ready. Define Python. Does it include you? What does it need to do to get ready. How do you plan to help? regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Blog of Note: http://holdenweb.blogspot.com See you at PyCon? http://us.pycon.org/TX2007 -- http://mail.python.org/mailman/listinfo/python-list
Re: IOError: [Errno 4] Interrupted system call
In article [EMAIL PROTECTED], Marco [EMAIL PROTECTED] wrote: Hello,every one, I meet a question: in my old script, I usually use os.popen2() to get info from standard unix(LinuX) program like ps,ifconfig... Now, I write a OO-based programme, I still use os.popen2( check whether mplayer still working via ps command ), but some things I got the following message: Traceback (most recent call last): File ./mkt.py, line 351, in loop_timeout self.process(self.event.get_next()) File ./mkt.py, line 361, in process self.player.play(command[1]) File ./mkt.py, line 107, in play if self.is_playing(): File ./mkt.py, line 78, in is_playing info = rfd.readlines() IOError: [Errno 4] Interrupted system call why? Thank you! Some signal was evidently delivered to your process, while you had a slow read in progress (i.e., not from disk.) The read was interrupted to deliver the signal. Look for signal handlers in your code and any library functions you call. I hope library functions don't have signal handlers, sounds like a horrible idea to me. If your code has a signal handler for SIGCHLD, try to get rid of that - the handler itself is causing your problem. OO (Object Oriented?) doesn't have anything to do with the problem, that I can think of. Donn Cave, [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: Why doesn't my heapify work?
Dongsheng Ruan wrote: I want to turn an Array into a heap, but my code just doesn't work: no change after execution. A=[3,5,4,9,6,7] m=len(A)-1 for i in range(m,1): t=(i-1)/2 if A[i]A[t]: A[i],A[t]=A[t],A[i] First of all, there is the module heapq that will just do it. And then you seem to misunderstand how the range-function works. range(m, 1) will always be the empty list. See pydoc range for how it operates. Overall, your code is very unpythonic, to say the least. I suggest you start reading the python tutorial first: http://docs.python.org/tut/ Especially the looping techniques section: http://docs.python.org/tut/node7.html#SECTION00760 Diez -- http://mail.python.org/mailman/listinfo/python-list
Suggestions on Starting Python Project on P2P streaming
I am 3 months old to python and I have done some small projects. I want to build a Peer to Peer streaming client ..something like BitTorrent. I know it is daunting but I got to start somewhere. Please come easy on me. What I want in my client program is that client software logs on to some P2P streaming session from a list, connects to several computers using TCP connection (protocol may vary in future), obtain stream from other computers and also send stream to others and play the obtained media stream on to some media playaer like xmms or any music player. My obstacles... 1. I have very little experice in network programming . some tips here are very welcome Please dont come hard on me. 2. I am not sure how stream content is gathered by client and sent to media player. suggestions welcome. 3. I have not managed this big project so I am not sure about how to manage the codesuggestions welcome. This newbiew appreiates your tips. Any comments are welcome. Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: Why doesn't my heapify work?
Can't range go from larger to smaller? Diez B. Roggisch [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Dongsheng Ruan wrote: I want to turn an Array into a heap, but my code just doesn't work: no change after execution. A=[3,5,4,9,6,7] m=len(A)-1 for i in range(m,1): t=(i-1)/2 if A[i]A[t]: A[i],A[t]=A[t],A[i] First of all, there is the module heapq that will just do it. And then you seem to misunderstand how the range-function works. range(m, 1) will always be the empty list. See pydoc range for how it operates. Overall, your code is very unpythonic, to say the least. I suggest you start reading the python tutorial first: http://docs.python.org/tut/ Especially the looping techniques section: http://docs.python.org/tut/node7.html#SECTION00760 Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Why doesn't my heapify work?
I found out what is wrong. You must give it a negative step, like range(10,1,-1) But my code is not good enought for heapify. I will try again. Ruan [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Can't range go from larger to smaller? Diez B. Roggisch [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Dongsheng Ruan wrote: I want to turn an Array into a heap, but my code just doesn't work: no change after execution. A=[3,5,4,9,6,7] m=len(A)-1 for i in range(m,1): t=(i-1)/2 if A[i]A[t]: A[i],A[t]=A[t],A[i] First of all, there is the module heapq that will just do it. And then you seem to misunderstand how the range-function works. range(m, 1) will always be the empty list. See pydoc range for how it operates. Overall, your code is very unpythonic, to say the least. I suggest you start reading the python tutorial first: http://docs.python.org/tut/ Especially the looping techniques section: http://docs.python.org/tut/node7.html#SECTION00760 Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Why doesn't my heapify work?
ruan Can't range go from larger to smaller? Yes. Read the doc: range(...) range([start,] stop[, step]) - list of integers Return a list containing an arithmetic progression of integers. range(i, j) returns [i, i+1, i+2, ..., j-1]; start (!) defaults to 0. When step is given, it specifies the increment (or decrement). For example, range(4) returns [0, 1, 2, 3]. The end point is omitted! These are exactly the valid indices for a list of 4 elements. To go from larger to smaller you need a negative step size. Also, note that the endpoint is never included. range(10) serves up 0 throu 9. Skip -- http://mail.python.org/mailman/listinfo/python-list
Re: multithreading concept
On Feb 7, 6:17 pm, John Nagle [EMAIL PROTECTED] wrote: Multithread compute-bound programs on multiple CPUs are how you get heavy number-crunching work done on multiprocessors. In the scientific community, heavy CPU-bound tasks are either parallelized using MPI and/or written in Fortran 90/95 and parallelized using an expensive vectorizing compiler. Of course, that's not something you use Python for, at least not until it gets a real compiler. That is also not correct: 1. Using Python does not change the complexity of the algorithm. Big-O is still the same, and Big-O is still the main determinant of performance. 2. I value my own time more than extra CPU cycles (and so does those who pay my salary). If Python is to slow, it is less expensive to compensate by using more CPUs than using a less productive language like Java or C++. 3. Only isolated bottlenecks really gain from being statically compiled. These are usually very small parts of the program. They can be identified with a profiler (intuition usually do not work very well here) and rewritten in Pyrex, Fortran 95, C or assembly. 4. There is NumPy and SciPy, which can make Python fast enough for most CPU-bound tasks. http://www.scipy.org/PerformancePython 5. Premature optimization is the root of all evil in computer science. (Donald Knuth) 6. Pyrex (the compiler you asked for) does actually exist. C and Fortran compilers can produce efficient code because they know the type of each variable. We have do a Python compiler that can do the same thing. It is called 'Pyrex' and extends Python with static types. Pyrex can therefore produce code that are just as efficient as hand-tuned C (see the link above). One can take the bad-performing Python code, add type declarations to the variables that Pyrex needs to generate efficient code (but all variables need not be declared), and leave the rest to the compiler. But this is only required for very small portions of the code. Transforming time-critical Python code to Pyrex is child's play. First make it work, then make it fast. At the University of Oslo, the HPC centre has been running Python courses for its clients. Python does not perform any worse than C or Fortran, one just has to know (1) how to use it, (2) when to use it, and (3) when not to use it. 99% of benchmarks showing bad performance with Python is due to programmers not understanding which operations are expensive in interpreted languages, and trying to use Python as if it were C++. The typical example would be code that use a loop instead of using the built-in function 'map' or a vectorized array expression with NumPy. It's also the direction games are going. I believe that is due to ignorance. Threads are implemented to be in an idle blocking state 99% of the time. The XBox 360 forced game developers to go that way, since it's a 3-CPU shared memory multiprocessor. That translates directly to multicore desktops and laptops. MPI works on SMPs. MPI does not use threads on SMPs because it performs worse than using multiple processes. -- http://mail.python.org/mailman/listinfo/python-list
Re: Group Membership in Active Directory Query
On Feb 7, 11:56 am, Uwe Hoffmann [EMAIL PROTECTED] wrote:
[EMAIL PROTECTED] schrieb:
ldap_obj = ldap_obj.simple_bind_s('[EMAIL PROTECTED]',
'password')
AttributeError: 'NoneType' object has no attribute 'search_Ext_s'
dummy = ldap_obj.simple_bind_s('[EMAIL PROTECTED]',
'password')
or better simply
ldap_obj.simple_bind_s('[EMAIL PROTECTED]',
'password')
First and foremost thanks for the feedback. Although I don't
appreciate the slight dig at me.
dummy = ldap_obj.simple_bind..
I tried your second recommendation of using
ldap_obj.simple_bind_s('[EMAIL PROTECTED]','password')
Now I get the following error even after the bind operation seems to
complete successfully.
result = func(*args,**kwargs)
OPERATIONS_ERROR: {'info': ': LdapErr: DSID-0C0905FF, comment:
In order to perform this operation a successful bind must be completed
on the connection., data 0, vece', 'desc': 'Operations error'}
Thanks again...
--
http://mail.python.org/mailman/listinfo/python-list
distutils: renaming setup.py ok?
I want to distribute Python site-packages. Is it okay to use other setup file names than setup.py, which is mentioned in any place I read in the doc? E.g., setupMySDK.py, setupMyLib.py It seems that it works with distutils at least - but probably doing so has side-effects with other tools which may expect exactly setup.py as file name. Many thanks, Anastasios -- http://mail.python.org/mailman/listinfo/python-list
Re: Why doesn't my heapify work?
You do know about the heapq module? http://docs.python.org/dev/lib/module-heapq.html -- mvh Björn -- http://mail.python.org/mailman/listinfo/python-list
Re: distutils: renaming setup.py ok?
Hello, Anastasios Hatzis wrote: I want to distribute Python site-packages. Is it okay to use other setup file names than setup.py, which is mentioned in any place I read in the doc? E.g., setupMySDK.py, setupMyLib.py It seems that it works with distutils at least - but probably doing so has side-effects with other tools which may expect exactly setup.py as file name. I'd say, it's mostly the user who is expecting setup.py as the filename. Perhaps 'setup.py --install-sdk' and 'setup.py --install-lib' would be more approriate (which can be done with distutils). HTH -- Benjamin Niemann Email: pink at odahoda dot de WWW: http://pink.odahoda.de/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Two mappings inverse to each other: f, g = biject()
[EMAIL PROTECTED] wrote: A google search for biject.py and bijection.py produced no hits, so I suspect that this may not have been done before. There are few (good too) implementations around, but they are called bidict or bidirectional dicts. Sometimes I use this implementation, with few changes: http://www.radlogic.com.au/releases/two_way_dict.py Thank you for this. You are quite right, a dictionary is a particular type of mapping. A mapping with an inverse is called (at least by me) a bijection. Therefore, as you say, bidict or something similar is correct for a bijection that is based on dictionaries. I had a look at the code in radlogic. There, the design philosophy is to add 'inverse operations' to a dictionary. Thus, it adds a method reversed_items. In my code, I used a different philosophy, which comes down to this. If a mapping is by design a bijection, then it should have an inverse method that gives the inverse mapping. This preserves the symmetry between a mapping and its inverse. (The inverse has an inverse, which is the original mapping.) Therefore, my semantics comes down to f, g = bidict() # Use the better name. assert f = g.inverse assert g = f.inverse and also f[a] = b if and only if g[b] = a By the way, it turns out that a bidict is not what my application needs. But I find it an interesting problem, and time spent on it I do not consider wasted. Best regards Jonathan -- http://mail.python.org/mailman/listinfo/python-list
Re: How can I use __setitem__ method of dict object?
On Feb 7, 12:48 pm, Jussi Salmela [EMAIL PROTECTED] wrote:
jeremito kirjoitti:
On Feb 7, 8:28 am, jeremito [EMAIL PROTECTED] wrote:
On Feb 6, 5:10 pm, Bruno Desthuilliers
[EMAIL PROTECTED] wrote:
jeremito a écrit :
On Feb 6, 2:36 pm, Bruno Desthuilliers [EMAIL PROTECTED] wrote:
(snip)
Here's an alternative implementation, so you get the idea.
class Xs(dict):
oops ! I meant:
class Xs(object):
of course...
(snip)
I guess I just
need more experience.
Possibly - but not only. You may want to have a look at the
FineManual(tm) for all this kind of magic, starting with
:http://docs.python.org/ref/specialnames.htmlhttp://docs.python.org/re...
HTH
Thanks again! Sometimes the problem is simply not knowing where to
find the documentation, or finding the right portion of the
documentation. Your help has been invaluable.
Jeremy
One more question. I will be asking for the value of cs.xT *many*
(~millions) times. Therefore I don't want it's value to be calculated
on the fly. How can I set the value of xT whenever xS, xF, or xG are
changed, but not allow it to be set directly? From the example given
previously, it seems like it can't be done this way.
Thans,
Jeremy
I'm certainly no wizard in timing, but here goes:
Using the class definition given to you by Bruno, adding the following
to the end (and 'import timeit' at the start):
#
lst = timeit.Timer('for i in xrange(10): xx=xs.xT', \
'from __main__ import Xs;xs = Xs()').repeat(100,1000)
lst.sort()
print lst
print 'Average:', sum(lst)/100
#
I get the output:
[0.017246605364648282, 0.01727426251101738, 0.017275659336591698,
0.017290745052793044, 0.01733264982001903, 0.017347735536220377,
and so on ...
0.029063749722380933, 0.029163762433493667, 0.029422733894950315,
0.029790378386079785]
Average: 0.0182474979362
Thus: A 1000 assignments take a little over 18 milliseconds. The largest
values in the list are probably caused bu GC occurring. But even 30 ms /
1000 iterations i.e. 30 microseconds per fetch seems to be fast enough.
All this depends of course on the computer used. Mine is on the fast
side, you might test it on your PC.
The correct way of programming is to find a good simple algorithm and
the data structures needed, to program a clean solution with them and
then when you've got a correctly operating application and THEN IF you
need speed try to do something about it.
Premature optimization is the worst evil or something like that is how
the saying goes.
Hopefully I'm not leading you astray by being a novice in using the
timeit module.
HTH,
Jussi
Thank you. Once again this mailing list has proven most helpful. I
realize it probably isn't worth my time (or stress) to figure out how
to avoid calculating xT on the fly-at least not yet.
Jeremy
--
http://mail.python.org/mailman/listinfo/python-list
Re: Calling J from Python
On Feb 7, 3:46 pm, Marc 'BlackJack' Rintsch [EMAIL PROTECTED] wrote: In [EMAIL PROTECTED], Gosi wrote: I like to use J for many things and I think that combining Python and J is a hell of a good mixture. I was able to follow this sentence up to and including the word hell... :-) Ciao, Marc 'BlackJack' Rintsch That is a start. Hell is also what most example start with as in Hello something Hell in northern countries is very cold. Hell in middle east is very hot. I do not know which is your Hell hot or cold. Hell o veröld -- http://mail.python.org/mailman/listinfo/python-list
Re: multithreading concept
sturlamolden [EMAIL PROTECTED] writes: On Feb 7, 6:17 pm, John Nagle [EMAIL PROTECTED] wrote: [...] MPI does not use threads on SMPs because it performs worse than using multiple processes. I fail to see how threads in general could perform worse than processes. I do understand that processes are inherently more safe/secure, but when it comes to speed I really can't imagine why it could happen that threads perform worse (poor threads implementation and programming practices aside). Care to give some references? -- Sergei. -- http://mail.python.org/mailman/listinfo/python-list
Pyserial example program error: win32file.SetupComm reports 'Incorrect function.'
I am using Python 2.5 on Windows XP. I have installed Pyserial and win32all extensions. When I try to run the example program scan.py (included below), or any other program using pyserial, as soon as it hits the statement: s = serial.Serial(i) I get the error: Traceback (most recent call last): File C:\Python25\Doc\PySerial Examples\scan.py, line 26, in module for n,s in scan(): File C:\Python25\Doc\PySerial Examples\scan.py, line 17, in scan s = serial.Serial(i) File C:\Python25\Lib\site-packages\serial\serialutil.py, line 156, in __init__ self.open() File C:\Python25\lib\site-packages\serial\serialwin32.py, line 57, in open win32file.SetupComm(self.hComPort, 4096, 4096) error: (1, 'SetupComm', 'Incorrect function.') What do I need to do to fix this? Thanks for the help! -- Ron The example program scan.py (from the pyserial examples folder): --- #!/usr/bin/env python Scan for serial ports. Part of pySerial (http://pyserial.sf.net) (C)2002-2003 [EMAIL PROTECTED] The scan function of this module tries to open each port number from 0 to 255 and it builds a list of those ports where this was successful. import serial def scan(): scan for available ports. return a list of tuples (num, name) available = [] for i in range(256): try: s = serial.Serial(i) available.append( (i, s.portstr)) s.close() #explicit close 'cause of delayed GC in java except serial.SerialException: pass return available if __name__=='__main__': print Found ports: for n,s in scan(): print (%d) %s % (n,s) -- http://mail.python.org/mailman/listinfo/python-list
Can somebody give me a python code for this?
Given an array of elements, look at it as a binary tree. Start at the last interior node, and downheap it. Then downheap the previous interior node, and continue in this fashion, up to the root. -- http://mail.python.org/mailman/listinfo/python-list
Python new user question - file writeline error
Hello,
I'm a newbie to Python wondering someone can help me with this...
I have this code:
--
#! /usr/bin/python
import sys
month ={'JAN':1,'FEB':2,'MAR':3,'APR':4,'MAY':5,'JUN':6,'JUL':7,'AUG':
8,'SEP':9,'OCT':10,'NOV':11,'DEC':12}
infile=file('TVA-0316','r')
outfile=file('tmp.out','w')
for line in infile:
item = line.split(',')
dob = item[6].split('/')
dob = dob[2]+'-'+str(month[dob[1]])+'-'+dob[0]
lbdt = item[8].split('/')
lbdt = lbdt[2]+'-'+str(month[lbdt[1]])+'-'+lbdt[0]
lbrc = item[10].split('/')
lbrc = lbrc[2]+'-'+str(month[lbrc[1]])+'-'+lbrc[0]
lbrp = item[14].split('/')
lbrp = lbrp[2]+'-'+str(month[lbrp[1]])+'-'+lbrp[0]
item[6] = dob
item[8] = lbdt
item[10]=lbrc
item[14]=lbrp
list = ','.join(item)
outfile.writelines(list)
infile.close
outfile.close
-
And the data file(TVA-0316) looks like this:
-
06-0588,03,701,03701,046613,JJB,05/MAR/1950,M,20/NOV/2006,08:50,21/
NOV/2006,V1,,,21/NOV/2006,AST,19,U/L,5,40,,
06-0588,03,701,03701,046613,JJB,05/MAR/1950,M,20/NOV/2006,08:50,21/
NOV/2006,V1,,,21/NOV/2006,GGT,34,U/L,11,32,h,
06-0588,03,701,03701,046613,JJB,05/MAR/1950,M,20/NOV/2006,08:50,21/
NOV/2006,V1,,,21/NOV/2006,ALT,31,U/L,5,29,h,
06-0588,03,701,03701,046613,JJB,05/MAR/1950,M,20/NOV/2006,08:50,21/
NOV/2006,V1,,,21/NOV/2006,ALKP,61,U/L,40,135,,
-
Basically I'm reading in each line and converting all date fields (05/
MAR/1950) to different format (1950-03-05) in order to load into MySQL
table.
I have two issues:
1. the outfile doesn't complete with no error message. when I check
the last line in the python interpreter, it has read and processed the
last line, but the output file stopped before.
2. Is this the best way to do this in Python?
3. (Out of scope) is there a way to load this CSV file directly into
MySQL data field without converting the format?
Thank you.
James
--
http://mail.python.org/mailman/listinfo/python-list
Re: mplayer bug or python bug?
On Feb 7, 11:40 am, Marco [EMAIL PROTECTED] wrote:
The following code is my test program for control mplayer.
in movies/ there are about 20 movies, the code plays them in circle,
but mplayer will crash silently after a circle, the sliently means I
can handle popen2 without except, but no movie.
I have no idea about it...
Can you help me?
class SimplePlayer( myobject ):
def __init__(self):
self.debug('simple player init ready')
self.is_open = False
self.wfd = None
self.rfd = None
def play(self, file):
if self.is_open:
self.wfd.write('loadfile %s\n' %(file))
self.wfd.flush()
else:
self.wfd, self.rfd = os.popen2('mplayer -loop 0 -slave
-quiet -ao null %s 2 /dev/null' %(file))
self.is_open = True
##
if __name__ == '__main__':
player = SimplePlayer()
all = os.listdir('movies/')
print all
while True:
for current in all:
print current
player.play('movies/' + current)
time.sleep(3)
Just a thought, but is mplayer writing anything to its standard output
or error streams? It may be trying to report an error! While you're
debugging, try redirecting them to logfiles.
--
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Re: need help to kill a process
On Feb 6, 8:24 pm, Gabriel Genellina [EMAIL PROTECTED] wrote: En Tue, 06 Feb 2007 22:59:40 -0300, [EMAIL PROTECTED] escribió: this is my code snip. within my python script I have the following commands.. snip import os ... os.system (cd /home; ./TestTool ) os.system (cd /usr/; sh run.sh load.xml ) snip I need to kill these 2 process after a particular job is done.. is there any way to get the pids of these process and if so how do i invoke the kill command through os.system.. or else is there anyother way to do this... If you're using Python=2.4 you could use the subprocess module. import subprocess child1 = subprocess.Popen([./TestTool], cwd=/home) child2 = subprocess.Popen([sh,run.sh,load.xml], cwd=/usr) Popen objects have a pid attribute. You don't have to use os.system to kill them; use os.kill instead. You'll notice that I leave out the final , because I don't know how to start a background process without using the shell. But I think you can use: bg [pid], afterwards, to get the same result. -- Gabriel Genellina- Hide quoted text - - Show quoted text - thx for the reply os.kill worked fine for the first process.. for the second one the kill managed to kill the shell but the application is still running.. is there any other work around for this.. thanks -- http://mail.python.org/mailman/listinfo/python-list
calling python from msc.adams
Hello all, i need to call python from msc.adams. the syntax is mdi -c python exit I have created a linux script called run_python with this content: mdi -c python $* exit then a call this script with a command: run_python script.py param1 param2 paramN Everything looks OK, but the problem is that also the last exit parameter in run_python script is taken as an input into script.py together with param1 param2 paramN. But I need this exit parameter not to send to python but to mdi. Is there anybody who could give me any hint of how to do it? Thank you very much. Regards, Boris -- http://mail.python.org/mailman/listinfo/python-list
Re: Python new user question - file writeline error
James a écrit :
Hello,
I'm a newbie to Python wondering someone can help me with this...
I have this code:
--
#! /usr/bin/python
import sys
month ={'JAN':1,'FEB':2,'MAR':3,'APR':4,'MAY':5,'JUN':6,'JUL':7,'AUG':
8,'SEP':9,'OCT':10,'NOV':11,'DEC':12}
infile=file('TVA-0316','r')
outfile=file('tmp.out','w')
for line in infile:
item = line.split(',')
CSV format ?
http://docs.python.org/lib/module-csv.html
dob = item[6].split('/')
dob = dob[2]+'-'+str(month[dob[1]])+'-'+dob[0]
Why did you use integers as values in the month dict if it's for using
them as strings ?
lbdt = item[8].split('/')
lbdt = lbdt[2]+'-'+str(month[lbdt[1]])+'-'+lbdt[0]
lbrc = item[10].split('/')
lbrc = lbrc[2]+'-'+str(month[lbrc[1]])+'-'+lbrc[0]
lbrp = item[14].split('/')
lbrp = lbrp[2]+'-'+str(month[lbrp[1]])+'-'+lbrp[0]
This may help too:
http://docs.python.org/lib/module-datetime.html
item[6] = dob
item[8] = lbdt
item[10]=lbrc
item[14]=lbrp
list = ','.join(item)
Better to avoid using builtin types names as identifiers. And FWIW, this
is *not* a list...
outfile.writelines(list)
You want file.writeline() or file.write(). And you have to manually add
the newline.
infile.close
You're not actually *calling* infile.close - just getting a reference on
the file.close method. The parens are not optional in Python, they are
the call operator.
outfile.close
Idem.
-
And the data file(TVA-0316) looks like this:
-
06-0588,03,701,03701,046613,JJB,05/MAR/1950,M,20/NOV/2006,08:50,21/
NOV/2006,V1,,,21/NOV/2006,AST,19,U/L,5,40,,
06-0588,03,701,03701,046613,JJB,05/MAR/1950,M,20/NOV/2006,08:50,21/
NOV/2006,V1,,,21/NOV/2006,GGT,34,U/L,11,32,h,
06-0588,03,701,03701,046613,JJB,05/MAR/1950,M,20/NOV/2006,08:50,21/
NOV/2006,V1,,,21/NOV/2006,ALT,31,U/L,5,29,h,
06-0588,03,701,03701,046613,JJB,05/MAR/1950,M,20/NOV/2006,08:50,21/
NOV/2006,V1,,,21/NOV/2006,ALKP,61,U/L,40,135,,
-
Basically I'm reading in each line and converting all date fields (05/
MAR/1950) to different format (1950-03-05) in order to load into MySQL
table.
I have two issues:
1. the outfile doesn't complete with no error message. when I check
the last line in the python interpreter, it has read and processed the
last line, but the output file stopped before.
Use the csv module and cleanly close your files, then come back if you
still have problems.
2. Is this the best way to do this in Python?
Err... What to say... Obviously, no.
--
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Re: Can somebody give me a python code for this?
John a écrit : Given an array of elements, look at it as a binary tree. Start at the last interior node, and downheap it. Then downheap the previous interior node, and continue in this fashion, up to the root. http://www.catb.org/~esr/faqs/smart-questions.html#homework -- http://mail.python.org/mailman/listinfo/python-list
Re: distutils: renaming setup.py ok?
Hello Benjamin Niemann wrote: Hello, Anastasios Hatzis wrote: I want to distribute Python site-packages. Is it okay to use other setup file names than setup.py, which is mentioned in any place I read in the doc? E.g., setupMySDK.py, setupMyLib.py It seems that it works with distutils at least - but probably doing so has side-effects with other tools which may expect exactly setup.py as file name. I'd say, it's mostly the user who is expecting setup.py as the filename. Perhaps 'setup.py --install-sdk' and 'setup.py --install-lib' would be more approriate (which can be done with distutils). Thank you for this hint. I think it will help. Regards, Anastasios -- http://mail.python.org/mailman/listinfo/python-list
Re: what is wrong with my python code?
Dongsheng Ruan a écrit : I got feed back saying list object is not callable. But I can't figure out what is wrong with my code. A=[3,5,4,9,6,7] l=len(A)-1 for i in range(l): print A(i) The error message is quite clear when you remember that () is the call operator. For the subscribe operator, you want []. And FWIW, Python for loops are smarter than that: A = [3,5,4,9,6,7] for i in A: print i -- http://mail.python.org/mailman/listinfo/python-list
Re: Python editor
limodou wrote: Maybe you can try ulipad. thanks, although it doesn't look bad, and it certainly must have been a huge job doing this with Tcl/Tk, I don't think it can compete with PyScripter, except on Linux ;-) succes, cheers, Stef Mientki -- http://mail.python.org/mailman/listinfo/python-list
Re: multithreading concept
On Feb 7, 8:03 pm, Sergei Organov [EMAIL PROTECTED] wrote: I fail to see how threads in general could perform worse than processes. I do understand that processes are inherently more safe/secure, but when it comes to speed I really can't imagine why it could happen that threads perform worse (poor threads implementation and programming practices aside). Care to give some references? I believe Nick Maclaren explained that to you (and me) on January 10 and 11 this group. As far as I have understood the issue, it has to do with poor threads implementations. Look that up on Google groups and re-read the discussion (or ask Nick Maclaren as he is far more competent than me). http://groups.google.com/group/comp.lang.python/browse_frm/thread/332083cdc8bc44b -- http://mail.python.org/mailman/listinfo/python-list
Re: Object type check
king kikapu a écrit : Hi to all, in statically-types languages, let's say C# for example, we use polymorphism through interfaces. So we define an interface I with method M and then a class C that implements I interface and write code for the M method. So, if we have a function that takes a parameter of type I, we know before-hand that it will have an M method to call. But in dynamic languages this is not the case and we can pass whatever we want to that function. Yes. And this is a Good Thing (tm). Assuming that someone writes a library in Python that other programmers will use, what is the correct way to check inside that function if the parameter passed is of the correct type, maybe isinstance BIF ? The correct way in Python is to *not* check. Just document what kind of interface you expect, and it's ok. If the people using your code are stupid and lazy enough to not read the doc, then you can't help . -- http://mail.python.org/mailman/listinfo/python-list
Re: Object type check
king kikapu a écrit : Dont restrict them to particular types. You would not restrict them to a particular class in C#. Instead, you define the interfaces simply by how you use the objects. Of cource i restrict them to particular types! In C# you cannot pass something bad this way because the compiler will just catch it! This won't prevent some stupid to implement the interface with a totally different semantic (what about some getter wiping out your hard drive ?). FWIW, in Python, you can't pass something bad because it will raise an exception. Well, to be true, there's *one* gotcha : passing a string where a list or tuple is expected may in some occasions yield strange results (strings being sequences too). I see what you mean by duck typing. So you suggest the do nothing at all direction, better document my code so other can see what is expected, right ? Exactly. -- http://mail.python.org/mailman/listinfo/python-list
Re: Can somebody give me a python code for this?
John wrote: Given an array of elements, look at it as a binary tree. Start at the last interior node, and downheap it. Then downheap the previous interior node, and continue in this fashion, up to the root. Your teacher ? -- http://mail.python.org/mailman/listinfo/python-list
