wierd threading behavior
Hello, I am just starting to play threading in python, here is a really interesting problem I am very curious about: " import thread def main(): thread.start_new(test.()) def test(): print 'hello' main() " this program doesn't print out 'hello' as it is supposed to do. while if I change main() into : " def main(): while 1: thread.start_new(test.()) " It goes on to print 'hello' forever. while if I use: " def main(): for i in range(5): print i thread.start_new(test.()) " It prints out 1,2,3,4,5 in main(), but still doesn't print out anything from test()! This is really wierd behavior for me, I am sure it's just something simple&stupid, please enlighten me! Thanks, qun -- http://mail.python.org/mailman/listinfo/python-list
Re: threading/forking and IPC
Thanks David, This seems like the exact thing I am looking for! -- http://mail.python.org/mailman/listinfo/python-list
Re: wierd threading behavior
Thanks Sam, That was a stupid typo ( yeah, I actually typed it in :), it should be (test,()). I am using python 2.4.1 in ubuntu. I do aware that threading.Thread is prefered, but I did not realize thread is deprecated. It is still a mysterious behavior anyhow. :) -- http://mail.python.org/mailman/listinfo/python-list
Re: wierd threading behavior
Thanks Neil, that's very useful to know. Qun -- http://mail.python.org/mailman/listinfo/python-list
beginner questions on embedding/extending python with C++
Hi Everyone, I am a beginner on cross language development. My problem at hand is to build a python interface for a C++ application built on top of a 3D game engine. The purpose of this python interface is providing a convenient scripting toolkit for the application. One example is that a user can write a python script like: player = Player() game.loadPlayer(player) player.moveTo(location) To configure the game environment. I am trying to figure out how to make this happen. I only have the vague idea that this concerns embedding/extending python with C++, but after reading Python Doc, SWIG, BOOST.Python, I am still not sure how to architecture it. Since the main program is still going to be the C++ application, I guess we need to embedding the python scripts in the C++ code. So at initialization stage, the python script needs to be loaded into the C++ code. And this code can be simple, like player = Player() game.loadPlayer(player) But for this to work, the python code needs to know the Player class, is it right? Does that mean I need to build a python wrapper class for Player and "import Player" in the python code? But because this application is built on top of a game engine, Player class inherits many classes from there, I cannot possibly wrapping them all, right? Also, some global objects are probably needed in this code of adding players, how can the python code access them? I know I probably don't have a grasp of basics here, please kindly enlighten me! Btw, if you can point me to any source code of non-trivial projects utilizing SWIG/Boost.Python, that would be very helpful. I found the examples on the tutorials are far too simple. Thank you very much, Qun -- http://mail.python.org/mailman/listinfo/python-list
(Boost.Python) How to load header files?
Hi Everyone,
I just started to use boost.python and having problem trying to get my
first program working.
I have a C++ class foo.cpp, defined in foo.h, I wrote a wrapper class
for it to generate a python module.
#include "Foo.h"
#include
#include
#include
using namespace boost::python;
BOOST_PYTHON_MODULE(mymodule)
{
class_("Foo")
.def ("init", &Foo:init)
}
The problem is that when I bjam it, the compiler cannot find the header
file , although I had the location of Foo.h added into $PATH. I
can make it work by copying Foo.h into the working directory, but Foo.h
is also depended on other libraries, so I need a generic way to
recognize the header files.
Thanks for any hit,
Qun
--
http://mail.python.org/mailman/listinfo/python-list
Re: beginner questions on embedding/extending python with C++
Thanks Diez, It is a good relief that I only need to wrap the classes I need. I decide to try Boost first because it seems to have a wider audience than SIP, but I would definately look into SIP if I want to do Qt development in the future. Diez B. Roggisch wrote: > > Since the main program is still going to be the C++ application, I > > guess we need to embedding the python scripts in the C++ code. So at > > initialization stage, the python script needs to be loaded into the C++ > > code. And this code can be simple, like > > player = Player() > > game.loadPlayer(player) > > > > > > But for this to work, the python code needs to know the Player class, > > is it right? Does that mean I need to build a python wrapper class for > > Player and "import Player" in the python code? But because this > > application is built on top of a game engine, Player class inherits > > many classes from there, I cannot possibly wrapping them all, right? > > Also, some global objects are probably needed in this code of adding > > players, how can the python code access the > You should look into SIP besides the tools you already mentioned - IMHO it > is the best choice for wrapping C++. > > And yes, you need to wrap classes - but only those that are of interest for > you! So if you need Player, wrap Player. No need to wrap it's base-classes, > unless you want these for other purposes, too. > > And for global objects I'd create functions which return these. > > I suggest you try and download a project that uses one of the possible > toolkits for wrapping - the most prominent user of SIP is of course PyQt. > Go and have a look at the source, how things are done. There aresome > tutorials I think, google should help you on that. > > HTH Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: beginner questions on embedding/extending python with C++
Thanks for all the good pointers! I am still reading throught them, but Boost seems to be the way to go! Roman Yakovenko wrote: > On 8 Aug 2006 02:28:31 -0700, Qun Cao <[EMAIL PROTECTED]> wrote: > > Hi Everyone, > > > > I am a beginner on cross language development. My problem at hand is to > > build a python interface for a C++ application built on top of a 3D > > game engine. The purpose of this python interface is providing a > > convenient scripting toolkit for the application. > > As for me, Boost.Python is the way to go. > > Fortunately you are not the first one, and I hope not the last one :-) : > > http://language-binding.net/pyplusplus/quotes.html#who-is-using-pyplusplus > 1. Python-OGRE > * http://lakin.weckers.net/index_ogre_python.html > * http://tinyurl.com/mvj8d > > 2. http://cgkit.sourceforge.net/ - contains Python bindings for Maya C++ SDK > > 3. PyOpenSG - https://realityforge.vrsource.org/view/PyOpenSG/WebHome >The goal of PyOpenSG is to provide python bindings for the OpenSG >scene graph. > > > Since the main program is still going to be the C++ application, I > > guess we need to embedding the python scripts in the C++ code. > > Boost.Python is the only tool that provides complete functionality( > extending and > embedding ). Also I think cgkit is dealing with the problem too. > > > But for this to work, the python code needs to know the Player class, > > is it right? > > Right. > > Does that mean I need to build a python wrapper class for > > Player and "import Player" in the python code? But because this > > application is built on top of a game engine, Player class inherits > > many classes from there, I cannot possibly wrapping them all, right? > > It depends on how much functionality you want to export. > > > Also, some global objects are probably needed in this code of adding > > players, how can the python code access them? > > Boost.Python provides the functionality you need. > > > Btw, if you can point me to any source code of non-trivial projects > > utilizing SWIG/Boost.Python, that would be very helpful. I found the > > examples on the tutorials are far too simple. > > Those are tutorials, they should be simple, right :-) ? > > -- > Roman Yakovenko > C++ Python language binding > http://www.language-binding.net/ -- http://mail.python.org/mailman/listinfo/python-list
