Re: threads problem in python

[Gabriel Genellina]

En Tue, 13 May 2008 06:42:13 -0300, Astan Chee <stanc@al.com.a uescribió:

I have 2 classes in python, the first one runs first and and then the
first one calls the second class. I want it to run the second class as a
separate thread but I want the first one to wait until the second class
is dead.
Im having problem in both killing the second class when its done and
making the first class wait for it to finish.
Im very confused on doing threads in python.

I'm confused trying to understand your requirements too. "run a class?"
Threads execute code, it's easier to think of them as *functions* that are
executed at the same time (or almost).
So you have a function A that runs first, and creates a second thread that
will execute function B. Then A will wait for B to finish. What do you
want to do in A while it's waiting? Nothing? Then why to use a second
thread? Or is it a graphical interfase? GUI libraries like wxPython, Qt
and others have specific ways to execute backgroung tasks while keeping
the user interface responsive - you should tell us which one you're using
in that case.

--
Gabriel Genellina

[castironpi@gmail.com]

Re: threads problem in python

On May 13, 5:38 am, "Gabriel Genellina" <gagsl-...@yahoo.com.a r>
wrote:

En Tue, 13 May 2008 06:42:13 -0300, Astan Chee <st...@al.com.a uescribió:
>

I have 2 classes in python, the first one runs first and and then the  
first one calls the second class. I want it to run the second class as a 
separate thread but I want the first one to wait until the second class  
is dead.
Im having problem in both killing the second class when its done and  
making the first class wait for it to finish.
Im very confused on doing threads in python.

>
I'm confused trying to understand your requirements too. "run a class?"
Threads execute code, it's easier to think of them as *functions* that are 
executed at the same time (or almost).
So you have a function A that runs first, and creates a second thread that 
will execute function B. Then A will wait for B to finish. What do you  
want to do in A while it's waiting? Nothing? Then why to use a second  
thread? Or is it a graphical interfase? GUI libraries like wxPython, Qt  
and others have specific ways to execute backgroung tasks while keeping  
the user interface responsive - you should tell us which one you're using  
in that case.
>
--
Gabriel Genellina

I don't mean to be impertinent, but are you making any cents with the
assignment? Both free-ers and workers come in here. I am a free-er
who has reason to doubt that money-driven programs get stuck at that
kind of ambiguity. I hold that money keeps you out of that mess.

However, there are a number of things we can do to help, but as I, per
se, am only one person, I may not give you the best advice to start
with. How do you find the 'threading.py' docs?

[Gabriel Genellina]

Re: threads problem in python

En Tue, 13 May 2008 20:46:51 -0300, Astan Chee <stanc@al.com.a uescribió:

Sorry, I mean functions not classes. Well, actually, one is a class and
another is a function. So when the script (its a free game btw) runs, it
instantiates the first class and somewhere in the middle of processing
the first class, I need to call a function as a separate thread, I also
want to wait for the function to complete and I was wondering how python
handles the thread of this function? Does it die when the function
completes? Anyway, I know it sounds silly to have 2 threads when I can
do it with one, but Im using wx to render opengl objects using pygame.
So it has to be a separate thread, otherwise wx wont play nice. Is there
a simple example of how I can do this?

That's why I asked about the GUI library used. For wx see

http://wiki.wxpython.org/LongRunningTasks

--
Gabriel Genellina