Re: Fast GUI pipemeter: gprog
On Mar 4, 4:25 pm, Dan Stromberg wrote: > Python folk: Any guesses why a simple file.read(blocksize) would have > such an affinity for returning 16K when redirected from /dev/zero? If > I run the program against a file on disk, it gets larger blocksizes > fine. Never mind - it was a bug in my code. Now on a slower machine, it runs about 2.5 times faster than it did on the faster machine. -- http://mail.python.org/mailman/listinfo/python-list
Re: start function in new process
On 5 mrt, 21:40, "Martin P. Hellwig" wrote: > On 03/05/10 20:09, wongjoek...@yahoo.com wrote: > > > > > On 5 mrt, 21:02, "Martin P. Hellwig" > > wrote: > >> On 03/05/10 19:45, wongjoek...@yahoo.com wrote: > > >>> On 5 mrt, 20:40, "Martin P. Hellwig" > >>> wrote: > On 03/05/10 19:21, wongjoek...@yahoo.com wrote: > > Any specific reason why threading.Thread or multiprocessing is not > suitable to solve your problem? > > -- > mph > > >>> Because I got a memory leak in my function f(). It uses scipy, numpy, > >>> pylab, and I am not planning to solve the memory leak because its too > >>> complicated. So I thought of just calling the function then when it is > >>> finished the process is gone and all memory is released. With > >>> threading I don't think I would solve this problem. I am not sure > >>> though. > > >> I would be surprised if you can't do the same with > >> subprocess/multiprocessing, since you seem to know how to identify the > >> memory leak it shouldn't be a problem scripting out a test to see if it > >> works this way. I would be interested though in your findings. > > >> -- > >> mph > > > I can't use multiprocessing module since it comes only with python 2.6 > > and I am bound to python2.4. But subprocess does exist in python2.4, > > but the question now is, how do I achieve that ? Any example ? > > Sure, for example if I want to check the openssl version (didn't specify > I need to provide a useful example :-) > > I would normally do on the command line: > [mar...@aspire8930 /usr/home/martin/Desktop]$ /usr/bin/openssl version > OpenSSL 0.9.8k 25 Mar 2009 > > The python subprocess equivalent is: > [mar...@aspire8930 /usr/home/martin/Desktop]$ python > Python 2.6.4 (r264:75706, Jan 31 2010, 20:52:16) > [GCC 4.2.1 20070719 [FreeBSD]] on freebsd8 > Type "help", "copyright", "credits" or "license" for more information. > >>> import subprocess as _sp > >>> ssl_version = _sp.Popen(['/usr/bin/openssl', 'version'], > stdout=_sp.PIPE) > >>> print(ssl_version.stdout.readlines()) > ['OpenSSL 0.9.8k 25 Mar 2009\n'] > >>> quit() > [mar...@aspire8930 /usr/home/martin/Desktop]$ > > If you get any error in the Popen part, you probably did not use the > full path or an illegal parameter. > > If you get a long wait in the readlines part, this usually means that > there is either nothing written to stdout or something is still being > written (I am not sure about this part though, it has been a while). > > hth > -- > mph Yes, I saw this example also before. HOwever what I want is to call an internal function which gets a reference of another internal function as input and not calling an external program. Do you have any example on that with subprocess module ? Thanks. -- http://mail.python.org/mailman/listinfo/python-list
compiler with python
hey, How can I construct a compiler with python just for informatiom ., I have habit to construct it with C language, sorry for my english ;-) -- issolah mohamed -- http://mail.python.org/mailman/listinfo/python-list
Building Python-2.6.4 on G/L: can't build in _ssl support.
Hi, Python! I build Python-2.6.4 on my GNU/Linux (Debian Sarge) box. I get a warning message "Failed to find the necessary bits to build these modules: _ssl ... RTFS to find out what!". I need _ssl for an application. So, I look at setup.py in the top directory. It seems that _ssl needs to find certain .h files, but is looking in /usr/local/ssl and /usr/contrib (or subdirectories thereof). These look like highly non-standard directories. Either something is hugely amiss, or I'm missing some vital nugget of information (possibly through not being a Python hacker). Would somebody please give me a tip to get this sorted out? Thanks! -- Alan Mackenzie (Nuremberg, Germany). -- http://mail.python.org/mailman/listinfo/python-list
Re: compiler with python
mohamed issolah wrote: hey, How can I construct a compiler with python just for informatiom ., I have habit to construct it with C language, sorry for my english ;-) You need to tell us what you're really trying to do, what tools you're willing to use, and probably why you want it. And if you're not sure about your English, keep the sentence structure straightforward. Let me make a couple of wild guesses: You want to design and build a compiler that takes xml information as its source code, and compiles those xml files into Intel x86 machine code. The compiler and the resulting executable needs to run on an x86 Linux machine. Your previous experience was in doing this sort of thing in C, but you want to try it with Python instead. You want to do it without using the lxml libraries. You want to build a python compiler, that takes python source code and produces Java byte code files. You'd like to do this in C, but don't want to use any of the available existing CPython or Jython source code. Your goal is not to make a commercially viable product, but to learn as much as possible in the process. DaveA -- http://mail.python.org/mailman/listinfo/python-list
Import problem
I have this directory structure
C:
\A
__init__.py
amodule.py
\B
__init__.py
bmodule.py
\D
__init__.py
dmodule.py
and I want to import bmodule.py
C:\>cd \
C:\>python
Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> from A.B import bmodule
I am bmodule
>>>
C:\>
so far so good. Now I would like to import bmodule but if the current
directory is \D subdirectory.
C:> cd \A\B\D
C:\A\B\D>
C:\A\B\D>python
Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path.append('C:\\A')
>>> from A.B import bmodule
Traceback (most recent call last):
File "", line 1, in
ImportError: No module named A.B
C:\>
so I can not import a module from the parent directory? Or where did I
make an error?
Thanks for help
L.
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Re: start function in new process
On 03/06/10 09:45, wongjoek...@yahoo.com wrote: Yes, I saw this example also before. HOwever what I want is to call an internal function which gets a reference of another internal function as input and not calling an external program. Do you have any example on that with subprocess module ? Thanks. Well yes that is possible but you would more or less be just reinventing parts of the multiprocessing module, so I would use that one (at the location Robert Kern suggested). -- mph -- http://mail.python.org/mailman/listinfo/python-list
compiler with python
hey, I want to create a compiler which transform a code like pascal code (that what I do in C) to "quad" In C, I use BISON and FLEX tools. -- issolah mohamed -- http://mail.python.org/mailman/listinfo/python-list
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Re: Import problem
On Sat, 06 Mar 2010 03:53:53 -0800, Johny wrote:
import sys
sys.path.append('C:\\A')
from A.B import bmodule
> Traceback (most recent call last):
> File "", line 1, in
> ImportError: No module named A.B
The current directory is irrelevant, except that it is automatically
added to the PYTHONPATH. That's why you can import A.B when the current
directory is C.
You are trying to import module B from package A *inside* directory C:\A,
but there is no such package A inside C:\A. You need to add C to the
path, and then it should work.
--
Steven
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Call for Paper The International Journal of Computer Science (IJCS)
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intersting datt with girls.......sign in to this website
RE U WANT RUSSIAN GIRL FRIENDS... WEBPAGE ---> http://123maza.com/hashan/ -- http://mail.python.org/mailman/listinfo/python-list
Re: compiler with python
mohamed issolah wrote: 2010/3/6 Dave Angel mohamed issolah wrote: hey, How can I construct a compiler with python just for informatiom ., I have habit to construct it with C language, sorry for my english ;-) You need to tell us what you're really trying to do, what tools you're willing to use, and probably why you want it. And if you're not sure about your English, keep the sentence structure straightforward. Let me make a couple of wild guesses: You want to design and build a compiler that takes xml information as its source code, and compiles those xml files into Intel x86 machine code. The compiler and the resulting executable needs to run on an x86 Linux machine. Your previous experience was in doing this sort of thing in C, but you want to try it with Python instead. You want to do it without using the lxml libraries. You want to build a python compiler, that takes python source code and produces Java byte code files. You'd like to do this in C, but don't want to use any of the available existing CPython or Jython source code. Your goal is not to make a commercially viable product, but to learn as much as possible in the process. DaveA hey, I want to create a compiler which transform a code like pascal code (that what I do in C) to "quad" In C, I use BISON and FLEX tools. I've forwarded your message to the list, and fixed your top-posting by moving your response to the bottom. I don't have a clue what "quad" is, unless it's a synonym for Forth. You haven't specified the OS you'll be using to run the compiler, nor the one you're targeting, so some of these choices may not be useful. For example, the first one is Linux only. http://www.freenet.org.nz/python/pybison/ PyBison - Python binding for Bison/Flex http://freshmeat.net/projects/yeanpypa/ http://www.slash-me.net/dev/snippets/yeanpypa/documentation.html http://www.python.org/community/sigs/retired/parser-sig/towards-standard/ Or you could go here, which has links to (most of) these and others. http://wiki.python.org/moin/LanguageParsing DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: best practices: is collections.defaultdict my friend or not?
Pete Emerson a écrit : (snip) > I'm really liking the rigid flexibility I'm experiencing with python > so far. "rigid flexibility" !-) +1 QOTW - and welcome on board BTW. -- http://mail.python.org/mailman/listinfo/python-list
Re: Building Python-2.6.4 on G/L: can't build in _ssl support.
Alan Mackenzie writes: > Hi, Python! > > I build Python-2.6.4 on my GNU/Linux (Debian Sarge) box. I get a warning > message "Failed to find the necessary bits to build these modules: > _ssl ... RTFS to find out what!". At a guess, you're missing libssl-dev. You might consider installing python2.6 or python2.6-minimal from unstable or testing too. > I need _ssl for an application. So, I look at setup.py in the top > directory. It seems that _ssl needs to find certain .h files, but is > looking in /usr/local/ssl and /usr/contrib (or subdirectories thereof). > These look like highly non-standard directories. Looks to me like it looks in those non-standard directories, but in addition to normal /usr/include. -- http://mail.python.org/mailman/listinfo/python-list
Escape curly bracket together to a variable extension
How to escape the first '}' in the next string?
s = "}\n{0}".format('foo')
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Re: Escape curly bracket together to a variable extension
* Joan Miller:
How to escape the first '}' in the next string?
s = "}\n{0}".format('foo')
s = "}}\n{0}".format('foo')
Cheers & hth.,
- Alf
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Re: Escape curly bracket together to a variable extension
Joan Miller wrote:
How to escape the first '}' in the next string?
s = "}\n{0}".format('foo')
>>> "}}\n{0}".format('foo')
'}\nfoo'
Gary Herron
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Re: compiler with python
Is it possible he's talking about a 'quad core'? as in a CPU? In that case I think he wants to optimize a python program for a multiprocessor core with four processors. sph On 03/06/2010 07:56 AM, Dave Angel wrote: mohamed issolah wrote: 2010/3/6 Dave Angel mohamed issolah wrote: hey, How can I construct a compiler with python just for informatiom ., I have habit to construct it with C language, sorry for my english ;-) You need to tell us what you're really trying to do, what tools you're willing to use, and probably why you want it. And if you're not sure about your English, keep the sentence structure straightforward. Let me make a couple of wild guesses: You want to design and build a compiler that takes xml information as its source code, and compiles those xml files into Intel x86 machine code. The compiler and the resulting executable needs to run on an x86 Linux machine. Your previous experience was in doing this sort of thing in C, but you want to try it with Python instead. You want to do it without using the lxml libraries. You want to build a python compiler, that takes python source code and produces Java byte code files. You'd like to do this in C, but don't want to use any of the available existing CPython or Jython source code. Your goal is not to make a commercially viable product, but to learn as much as possible in the process. DaveA hey, I want to create a compiler which transform a code like pascal code (that what I do in C) to "quad" In C, I use BISON and FLEX tools. I've forwarded your message to the list, and fixed your top-posting by moving your response to the bottom. I don't have a clue what "quad" is, unless it's a synonym for Forth. You haven't specified the OS you'll be using to run the compiler, nor the one you're targeting, so some of these choices may not be useful. For example, the first one is Linux only. http://www.freenet.org.nz/python/pybison/ PyBison - Python binding for Bison/Flex http://freshmeat.net/projects/yeanpypa/ http://www.slash-me.net/dev/snippets/yeanpypa/documentation.html http://www.python.org/community/sigs/retired/parser-sig/towards-standard/ Or you could go here, which has links to (most of) these and others. http://wiki.python.org/moin/LanguageParsing DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: compiler with python
Since Mohamed is talking about compilation I think it's more likely he's talking about an intermediate program represention based on quad tuples like (OP, DESTINATION, ARG1, ARG2) Cheers, - Alf * Steven Howe: Is it possible he's talking about a 'quad core'? as in a CPU? In that case I think he wants to optimize a python program for a multiprocessor core with four processors. sph On 03/06/2010 07:56 AM, Dave Angel wrote: mohamed issolah wrote: 2010/3/6 Dave Angel mohamed issolah wrote: hey, How can I construct a compiler with python just for informatiom ., I have habit to construct it with C language, sorry for my english ;-) You need to tell us what you're really trying to do, what tools you're willing to use, and probably why you want it. And if you're not sure about your English, keep the sentence structure straightforward. Let me make a couple of wild guesses: You want to design and build a compiler that takes xml information as its source code, and compiles those xml files into Intel x86 machine code. The compiler and the resulting executable needs to run on an x86 Linux machine. Your previous experience was in doing this sort of thing in C, but you want to try it with Python instead. You want to do it without using the lxml libraries. You want to build a python compiler, that takes python source code and produces Java byte code files. You'd like to do this in C, but don't want to use any of the available existing CPython or Jython source code. Your goal is not to make a commercially viable product, but to learn as much as possible in the process. DaveA hey, I want to create a compiler which transform a code like pascal code (that what I do in C) to "quad" In C, I use BISON and FLEX tools. I've forwarded your message to the list, and fixed your top-posting by moving your response to the bottom. I don't have a clue what "quad" is, unless it's a synonym for Forth. You haven't specified the OS you'll be using to run the compiler, nor the one you're targeting, so some of these choices may not be useful. For example, the first one is Linux only. http://www.freenet.org.nz/python/pybison/ PyBison - Python binding for Bison/Flex http://freshmeat.net/projects/yeanpypa/ http://www.slash-me.net/dev/snippets/yeanpypa/documentation.html http://www.python.org/community/sigs/retired/parser-sig/towards-standard/ Or you could go here, which has links to (most of) these and others. http://wiki.python.org/moin/LanguageParsing DaveA -- http://mail.python.org/mailman/listinfo/python-list
compiler with python
hey, yes quad = quad tuple like ("+",x1,x2,temp)
I work in linux
example : my parser with flex :
--
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token.l
Description: Binary data
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[RELEASED] Python 3.1.2 release candidate
On behalf of the Python development team, I'm pleased to announce a release candidate for the second bugfix release of the Python 3.1 series, Python 3.1.2. This bug fix release fixes numerous issues found in 3.1.1. This release candidate has been released to solicit testing and feedback over an possible regressions from 3.1.1. Please consider testing it with your library or application and reporting an bugs you encounter. This will help make the final 3.1.2 release, planned in 2 weeks time, all the more stable. The Python 3.1 version series focuses on the stabilization and optimization of the features and changes that Python 3.0 introduced. For example, the new I/O system has been rewritten in C for speed. File system APIs that use unicode strings now handle paths with undecodable bytes in them. Other features include an ordered dictionary implementation, a condensed syntax for nested with statements, and support for ttk Tile in Tkinter. For a more extensive list of changes in 3.1, see http://doc.python.org/3.1/whatsnew/3.1.html or Misc/NEWS in the Python distribution. To download Python 3.1.2rc1 visit: http://www.python.org/download/releases/3.1.2/ A list of changes in 3.1.2rc1 can be found here: http://svn.python.org/projects/python/tags/r312rc1/Misc/NEWS The 3.1 documentation can be found at: http://docs.python.org/3.1 Bugs can always be reported to: http://bugs.python.org Enjoy! -- Benjamin Peterson Release Manager benjamin at python.org (on behalf of the entire python-dev team and 3.1.2's contributors) -- http://mail.python.org/mailman/listinfo/python-list
Re: Conditional based on whether or not a module is being used
On Mar 5, 9:29 pm, Pete Emerson wrote: > > I have written my first module called "logger" that logs to syslog via > the syslog module but also allows forloggingto STDOUT in debug mode > at multiple levels (to increase verbosity depending on one's need), or > both. I've looked at theloggingmodule and while it might suit my > needs, it's overkill for me right now (I'm still *very* much a python > newbie). > Overkill in what sense? You just need to write a few lines of code to be able to use the logging package which comes with Python: import logging, logging.handlers, sys logging.basicConfig(level=logging.DEBUG, stream=sys.stdout) logging.getLogger().addHandler(logging.handlers.SysLogHandler()) # default logs to syslog at (localhost, 514) with facility LOG_USER # you can change the default to use e.g. Unix domain sockets and a different facility So you're experienced enough and have time enough to write your own logger module, but too much of a newbie to use a module which is part of Python's included batteries? If you're writing something like logging to learn about it and what the issues are, that's fair enough. But I can't see what you mean by overkill, exactly. The three lines above (or thereabouts) will, I believe, let you log to syslog and to stdout...which is what you say you want to do. > I want to write other modules, and my thinking is that it makes sense > for those modules to use the "logger" module to do thelogging, if and > only if the parent using the other modules is also using the logger > module. > > In other words, I don't want to force someone to use the "logger" > module just so they can use my other modules, even if the "logger" > module is installed ... but I also want to take advantage of it if I'm > using it. > > Now that I've written that, I'm not sure that makes a whole lot of > sense. It seems like I could say, "hey, this person has the 'logger' > module available, let's use it!". > > Thoughts? Well, the logging package is available in Python and ready for use and pretty much battle tested, so why not use that? Are you planning to use third-party libraries in your Python work, or write everything yourself? If you are planning to use third party libraries, how would their logging be hooked into your logger module? And if not, is it good to have two logging systems in parallel? Of course as the maintainer of Python's logging package, you'd expect me to be biased in favour of it. You maybe shouldn't let that sway you ;-) Regards, Vinay Sajip -- http://mail.python.org/mailman/listinfo/python-list
[RELEASED] Python 2.7 alpha 4
On behalf of the Python development team, I'm overjoyed to announce the fourth alpha release of Python 2.7. Python 2.7 is scheduled (by Guido and Python-dev) to be the last major version in the 2.x series. Though more major releases have not been absolutely ruled out, it's likely that the 2.7 release will an extended period of maintenance for the 2.x series. 2.7 includes many features that were first released in Python 3.1. The faster io module, the new nested with statement syntax, improved float repr, set literals, dictionary views, and the memoryview object have been backported from 3.1. Other features include an ordered dictionary implementation, unittests improvements, a new sysconfig module, and support for ttk Tile in Tkinter. For a more extensive list of changes in 2.7, see http://doc.python.org/dev/whatsnew/2.7.html or Misc/NEWS in the Python distribution. To download Python 2.7 visit: http://www.python.org/download/releases/2.7/ Please note that this is a development release, intended as a preview of new features for the community, and is thus not suitable for production use. The 2.7 documentation can be found at: http://docs.python.org/2.7 Please consider trying Python 2.7 with your code and reporting any bugs you may notice to: http://bugs.python.org Enjoy! -- Benjamin Peterson 2.7 Release Manager benjamin at python.org (on behalf of the entire python-dev team and 2.7's contributors) -- http://mail.python.org/mailman/listinfo/python-list
Re: Sample code usable Tkinter listbox
Opps: found a few errors in that last ScrolledListbox class, try this
one...
import Tkinter as tk
from Tkconstants import *
class ScrolledList(tk.Listbox):
def __init__(self, master, **kw):
self.frame = tk.Frame(master)
self.frame.rowconfigure(0, weight=1)
self.frame.columnconfigure(0, weight=1)
self.hbar = tk.Scrollbar(self.frame, orient=HORIZONTAL)
self.block = tk.Frame(self.frame, width=18, height=18)
self.block.grid(row=1, column=1)
self.vbar = tk.Scrollbar(self.frame, orient=VERTICAL)
kw.setdefault('activestyle', 'none')
kw.setdefault('highlightthickness', 0)
kw.setdefault('pack', 0)
if kw.pop('pack') == 1:
self.frame.pack(fill=BOTH, expand=1)
tk.Listbox.__init__(self, self.frame, **kw)
self.grid(row=0, column=0, sticky=N+S+E+W)
self.hbar.configure(command=self.xview)
self.vbar.configure(command=self.yview)
self.config(
yscrollcommand=self.vbar.set,
xscrollcommand=self.hbar.set
)
self.hbar.grid(row=1, column=0, sticky=W+E)
self.vbar.grid(row=0, column=1, sticky=N+S)
self.pack = lambda **kw: self.frame.pack(**kw)
self.grid = lambda **kw: self.frame.grid(**kw)
self.place = lambda **kw: self.frame.place(**kw)
self.pack_config = lambda **kw: self.frame.pack_config(**kw)
self.grid_config = lambda **kw: self.frame.grid_config(**kw)
self.place_config = lambda **kw: self.frame.place_config(**kw)
self.pack_configure = lambda **kw:
self.frame.pack_config(**kw)
self.grid_configure = lambda **kw:
self.frame.grid_config(**kw)
self.place_configure = lambda **kw:
self.frame.place_config(**kw)
def gets(self):
return self.get(0, END)
def sets(self, arg):
self.delete(0, END)
try:
arg = arg.strip('\n').splitlines()
except AttributeError:
pass
if hasattr(arg, '__getitem__'):
for item in arg:
self.insert(END, str(item))
else:
raise TypeError("Scrolledlist.sets() requires a string or
iterable of strings")
if __name__ == '__main__':
root = tk.Tk()
listbox = ScrolledList(root, width=50, height=10, pack=1)
#listbox.sets(1.25)
#listbox.sets('1\n2\n3\n4\n5\n\n\n')
listbox.sets(range(100))
#listbox.grid(row=0, column=0)
root.mainloop()
--
http://mail.python.org/mailman/listinfo/python-list
Re: Conditional based on whether or not a module is being used
On Mar 6, 2:38 pm, Vinay Sajip wrote: > On Mar 5, 9:29 pm, Pete Emerson wrote: > > > > > I have written my first module called "logger" that logs to syslog via > > the syslog module but also allows forloggingto STDOUT in debug mode > > at multiple levels (to increase verbosity depending on one's need), or > > both. I've looked at theloggingmodule and while it might suit my > > needs, it's overkill for me right now (I'm still *very* much a python > > newbie). > > Overkill in what sense? You just need to write a few lines of code to > be able to use the logging package which comes with Python: > > import logging, logging.handlers, sys > logging.basicConfig(level=logging.DEBUG, stream=sys.stdout) > logging.getLogger().addHandler(logging.handlers.SysLogHandler()) > # default logs to syslog at (localhost, 514) with facility LOG_USER > # you can change the default to use e.g. Unix domain sockets and a > different facility > > So you're experienced enough and have time enough to write your own > logger module, but too much of a newbie to use a module which is part > of Python's included batteries? If you're writing something like > logging to learn about it and what the issues are, that's fair enough. > But I can't see what you mean by overkill, exactly. The three lines > above (or thereabouts) will, I believe, let you log to syslog and to > stdout...which is what you say you want to do. > > > I want to write other modules, and my thinking is that it makes sense > > for those modules to use the "logger" module to do thelogging, if and > > only if the parent using the other modules is also using the logger > > module. > > > In other words, I don't want to force someone to use the "logger" > > module just so they can use my other modules, even if the "logger" > > module is installed ... but I also want to take advantage of it if I'm > > using it. > > > Now that I've written that, I'm not sure that makes a whole lot of > > sense. It seems like I could say, "hey, this person has the 'logger' > > module available, let's use it!". > > > Thoughts? > > Well, the logging package is available in Python and ready for use and > pretty much battle tested, so why not use that? Are you planning to > use third-party libraries in your Python work, or write everything > yourself? If you are planning to use third party libraries, how would > their logging be hooked into your logger module? And if not, is it > good to have two logging systems in parallel? > > Of course as the maintainer of Python's logging package, you'd expect > me to be biased in favour of it. You maybe shouldn't let that sway > you ;-) > > Regards, > > Vinay Sajip Thanks for your insights, Vinay, and thank you also for writing packages such as logging. The word 'overkill' was a poor choice on my part! I should have said, "I don't quite understand the logging module yet, but I am comfortable with the syslog module's two functions, openlog and syslog". I wrote my own logger module *partly* to gain the experience, and partly to do the following: 1) In debug mode, send what would have gone to syslog to STDOUT or STDERR 2) In non-debug mode, use /dev/log or localhost:514 depending on what is set 3) Allow for multiple levels of logging beyond INFO, WARNING, CRIT ... essentially allow multiple levels of INFO depending on how much detail is desired. A high level of messaging when programs are running poorly is desired, but when programs are running smoothly, I don't need to send as much to syslog. I started in with your logging package, but I think I simply got ahead of myself. I definitely agree that writing my own wrappers around syslog to do what I want might be a duplication of effort. At this point I think I'm ready to go back to your logging package and see what I can do; if you have words of advice regarding 1-3 above, I'd certainly appreciate it. Now I'll go to your example above and see what it does. Thank you! Pete -- http://mail.python.org/mailman/listinfo/python-list
python b.python 8 works on XP but not on Vista?
At the command prompt: python b.py 8 works fine on both XP and Vista python b.python 8 works on XP (and Linux) but on Vista python b.python 8 ImportError: No module named b ? -- http://mail.python.org/mailman/listinfo/python-list
async notification handling w/o threads/polling (similiar to kill -hup)?
Hi,
I'd like to notify python processes asynchronously.
at notification time a callback should be called
The solution should be working on linux and Windows.
I could add a wrapper to switch between a windows / linux implementation
though
If possible I'd like to avoid
- having to poll for an external event
- having to add a thread.
- changing my existing code
I thought about using signal and os.kill()
However windows does not to have SIGHUP , SIGUSR1 or SIGUSR2.
So I'm not sure, which signal I could use with windows.
Apart from that there's one minor problem with signals
which might speak against using signal
All blocking io calls might be interrupted, which is not desirable in my
case.
Do you have any suggestions for
Linux / WIndows or both?
example code with signals #
a blocking io call here reading a named pipe
would be interrupted
import signal
a = 0
def handler(signum,frame):
global a
a += 1
signal.signal(signal.SIGUSR1,handler)
print "hi"
p = open("namedpipe")
while True:
v = p.read(2)
print "V:",a,len(v)
if len(v) != 2: break
print "var a changed, but read() was interrupted :-("
bye
N
--
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Re: python b.python 8 works on XP but not on Vista?
On Sat, Mar 6, 2010 at 3:53 PM, Isaac Gouy wrote: > At the command prompt: > > python b.py 8 > works fine on both XP and Vista > > python b.python 8 > works on XP (and Linux) > > but on Vista > > python b.python 8 > > ImportError: No module named b > > ? Code please. Also, .python is not a standard extension for Python files, so why are you using it anyway? Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
Re: async notification handling w/o threads/polling (similiar to kill -hup)?
News123 wrote:
> Hi,
>
> I'd like to notify python processes asynchronously.
> at notification time a callback should be called
>
> The solution should be working on linux and Windows.
>
> I could add a wrapper to switch between a windows / linux implementation
> though
>
> If possible I'd like to avoid
> - having to poll for an external event
> - having to add a thread.
Well having a blocking thread would be fine though. what I'd really want
to avoid is any polling.
> - changing my existing code
>
> I thought about using signal and os.kill()
> However windows does not to have SIGHUP , SIGUSR1 or SIGUSR2.
> So I'm not sure, which signal I could use with windows.
>
>
> Apart from that there's one minor problem with signals
> which might speak against using signal
> All blocking io calls might be interrupted, which is not desirable in my
> case.
>
> Do you have any suggestions for
> Linux / WIndows or both?
>
>
> example code with signals #
> a blocking io call here reading a named pipe
> would be interrupted
> import signal
> a = 0
> def handler(signum,frame):
> global a
> a += 1
>
> signal.signal(signal.SIGUSR1,handler)
> print "hi"
> p = open("namedpipe")
> while True:
> v = p.read(2)
> print "V:",a,len(v)
> if len(v) != 2: break
>
> print "var a changed, but read() was interrupted :-("
>
>
> bye
>
>
> N
--
http://mail.python.org/mailman/listinfo/python-list
Re: python b.python 8 works on XP but not on Vista?
On Mar 6, 4:02 pm, Chris Rebert wrote: > On Sat, Mar 6, 2010 at 3:53 PM, Isaac Gouy wrote: > > At the command prompt: > > > python b.py 8 > > works fine on both XP and Vista > > > python b.python 8 > > works on XP (and Linux) > > > but on Vista > > > python b.python 8 > > > ImportError: No module named b > > > ? > > Code please. It's the same code in both cases, I simply renamed "b.python" as "b.py" as a test. > Also, .python is not a standard extension for Python > files, so why are you using it anyway? Because it's useful for what I'm doing. Given python 2.6.4 has no problem with a non-standard extension on MS XP and Linux - why does python 2.6.4 have this problem with a non- standard extension on MS Vista? -- http://mail.python.org/mailman/listinfo/python-list
Re: indentation error
asit wrote: > >According to me, indentation is ok. but the python interpreter gives >an indentation error > >[asit ~/py] $ python search.py > File "search.py", line 7 >findResults = string.split(commandOutput, "\n") > ^ >IndentationError: unindent does not match any outer indentation level The most likely cause is mixing spaces with tabs. -- Tim Roberts, t...@probo.com Providenza & Boekelheide, Inc. -- http://mail.python.org/mailman/listinfo/python-list
Re: python b.python 8 works on XP but not on Vista?
On Sat, Mar 6, 2010 at 4:42 PM, Isaac Gouy wrote: > On Mar 6, 4:02 pm, Chris Rebert wrote: >> On Sat, Mar 6, 2010 at 3:53 PM, Isaac Gouy wrote: >> > At the command prompt: >> >> > python b.py 8 >> > works fine on both XP and Vista >> >> > python b.python 8 >> > works on XP (and Linux) >> >> > but on Vista >> >> > python b.python 8 >> >> > ImportError: No module named b >> >> > ? >> >> Code please. > > > It's the same code in both cases, I simply renamed "b.python" as > "b.py" as a test. The code in b.py matters. I /suspect/ it's importing itself somehow (probably indirectly), and Python doesn't look for ".python" files when importing, so it fails with an ImportError. But since you haven't shown the code, I can only guess. For that matter, the full exception Traceback would be more helpful than the code; please include it as well. Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
Re: python b.python 8 works on XP but not on Vista?
On Mar 6, 4:53 pm, Chris Rebert wrote: > On Sat, Mar 6, 2010 at 4:42 PM, Isaac Gouy wrote: > > On Mar 6, 4:02 pm, Chris Rebert wrote: > >> On Sat, Mar 6, 2010 at 3:53 PM, Isaac Gouy wrote: > >> > At the command prompt: > > >> > python b.py 8 > >> > works fine on both XP and Vista > > >> > python b.python 8 > >> > works on XP (and Linux) > > >> > but on Vista > > >> > python b.python 8 > > >> > ImportError: No module named b > > >> > ? > > >> Code please. > > > It's the same code in both cases, I simply renamed "b.python" as > > "b.py" as a test. > > The code in b.py matters. I /suspect/ it's importing itself somehow > (probably indirectly), and Python doesn't look for ".python" files > when importing, so it fails with an ImportError. But since you haven't > shown the code, I can only guess. Yes the code in b.py matters. Why it matters is that there was another difference between XP and Vista - the XP machine was single core but the Vista machine was multi core - and the code behaves differently in each case. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: python b.python 8 works on XP but not on Vista?
On Mar 6, 2010, at 8:23 PM, Isaac Gouy wrote: > On Mar 6, 4:53 pm, Chris Rebert wrote: >> On Sat, Mar 6, 2010 at 4:42 PM, Isaac Gouy wrote: >>> On Mar 6, 4:02 pm, Chris Rebert wrote: On Sat, Mar 6, 2010 at 3:53 PM, Isaac Gouy wrote: > At the command prompt: >> > python b.py 8 > works fine on both XP and Vista >> > python b.python 8 > works on XP (and Linux) >> > but on Vista >> > python b.python 8 >> > ImportError: No module named b >> > ? >> Code please. >> >>> It's the same code in both cases, I simply renamed "b.python" as >>> "b.py" as a test. >> >> The code in b.py matters. I /suspect/ it's importing itself somehow >> (probably indirectly), and Python doesn't look for ".python" files >> when importing, so it fails with an ImportError. But since you haven't >> shown the code, I can only guess. > > Yes the code in b.py matters. > > Why it matters is that there was another difference between XP and > Vista - the XP machine was single core but the Vista machine was multi > core - and the code behaves differently in each case. Yes, and the XP machine's case was blue, therefore case color is important, too. S -- http://mail.python.org/mailman/listinfo/python-list
Re: python b.python 8 works on XP but not on Vista?
On Sat, 06 Mar 2010 21:10:02 -0500, sstein...@gmail.com wrote: > On Mar 6, 2010, at 8:23 PM, Isaac Gouy wrote: > >> On Mar 6, 4:53 pm, Chris Rebert wrote: >>> On Sat, Mar 6, 2010 at 4:42 PM, Isaac Gouy wrote: On Mar 6, 4:02 pm, Chris Rebert wrote: > On Sat, Mar 6, 2010 at 3:53 PM, Isaac Gouy wrote: >> At the command prompt: >>> >> python b.py 8 >> works fine on both XP and Vista >>> >> python b.python 8 >> works on XP (and Linux) >>> >> but on Vista >>> >> python b.python 8 >>> >> ImportError: No module named b >>> >> ? >>> > Code please. >>> It's the same code in both cases, I simply renamed "b.python" as "b.py" as a test. >>> >>> The code in b.py matters. I /suspect/ it's importing itself somehow >>> (probably indirectly), and Python doesn't look for ".python" files >>> when importing, so it fails with an ImportError. But since you haven't >>> shown the code, I can only guess. >> >> Yes the code in b.py matters. >> >> Why it matters is that there was another difference between XP and >> Vista - the XP machine was single core but the Vista machine was multi >> core - and the code behaves differently in each case. > > Yes, and the XP machine's case was blue, therefore case color is > important, too. Don't forget that the XP machine was on the left hand side of the desk, and the Vista machine on the right. I suspect Isaac needs to physically move the Vista machine to the left side, and it will work perfectly. Either that, or stop pissing around and show us the actual stack trace so we can actually help. Isaac, stop *guessing* what the problem is. If you have to guess, try to make your guesses realistic. It's not likely anything to do with the CPU. If anything, Python's search path is different on your Vista and XP machines. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: python b.python 8 works on XP but not on Vista?
On Mar 6, 6:50 pm, Steven D'Aprano wrote: > On Sat, 06 Mar 2010 21:10:02 -0500, sstein...@gmail.com wrote: > > On Mar 6, 2010, at 8:23 PM, Isaac Gouy wrote: > > >> On Mar 6, 4:53 pm, Chris Rebert wrote: > >>> On Sat, Mar 6, 2010 at 4:42 PM, Isaac Gouy wrote: > On Mar 6, 4:02 pm, Chris Rebert wrote: > > On Sat, Mar 6, 2010 at 3:53 PM, Isaac Gouy wrote: > >> At the command prompt: > > >> python b.py 8 > >> works fine on both XP and Vista > > >> python b.python 8 > >> works on XP (and Linux) > > >> but on Vista > > >> python b.python 8 > > >> ImportError: No module named b > > >> ? > > > Code please. > > It's the same code in both cases, I simply renamed "b.python" as > "b.py" as a test. > > >>> The code in b.py matters. I /suspect/ it's importing itself somehow > >>> (probably indirectly), and Python doesn't look for ".python" files > >>> when importing, so it fails with an ImportError. But since you haven't > >>> shown the code, I can only guess. > > >> Yes the code in b.py matters. > > >> Why it matters is that there was another difference between XP and > >> Vista - the XP machine was single core but the Vista machine was multi > >> core - and the code behaves differently in each case. > > > Yes, and the XP machine's case was blue, therefore case color is > > important, too. > > Don't forget that the XP machine was on the left hand side of the desk, > and the Vista machine on the right. I suspect Isaac needs to physically > move the Vista machine to the left side, and it will work perfectly. > > Either that, or stop pissing around and show us the actual stack trace so > we can actually help. Isaac, stop *guessing* what the problem is. > > If you have to guess, try to make your guesses realistic. It's not likely > anything to do with the CPU. If anything, Python's search path is > different on your Vista and XP machines. > > -- > Steven That was "Thanks." as in problem solved. When the code switches on multiprocessing.cpu_count() - single core vs multicore matters. -- http://mail.python.org/mailman/listinfo/python-list
yappi v0.42 released
Hi all, yappi(yet another python profiler with multithreading support) released. See: http://code.google.com/p/yappi/ Thanks, -- http://mail.python.org/mailman/listinfo/python-list
Re: python b.python 8 works on XP but not on Vista?
On Sat, 06 Mar 2010 19:04:56 -0800, Isaac Gouy wrote: > That was "Thanks." as in problem solved. > > When the code switches on multiprocessing.cpu_count() - single core vs > multicore matters. I'm glad you solved your problem. Out of curiosity, what was the fault? Not the condition that leads to the fault, but the actual fault? My guess is that it was a difference in sys.path, leading to the b module not being found. Am I close? -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Asynchronous HTTP client
Hi,
I'm trying to find a way to create an asynchronous HTTP client so I
can get responses from web servers in a way like
async_http_open('http://example.com/', callback_func)
# immediately continues, and callback_func is called with response
as arg when it is ready
It seems twisted can do it, but I hesitate to bring in such a big
package as a dependency because my client should be light. Asyncore
and asynchat are lighter but they don't speak HTTP. The asynchttp
project on sourceforge is a fusion between asynchat and httplib, but
it hasn't been updated since 2001 and is seriously out of sync with
httplib.
I'd appreciate it if anyone can shed some lights on this.
Thanks,
Ping
--
http://mail.python.org/mailman/listinfo/python-list
