Multiprocessing or Multithreading?

Question

I\'m making a program for running simulations in Python, with a wxPython interface. In the program, you can create a simulation, and the program renders (=calculates) it for

Answer 1

With CPython multiple threads can't execute at the same time because of the GIL: link text.

I think it's still possible that threads boost your application, e.g. a thread might block on I/O while another one does some work.

If you've never used threads, I suggest that you try them first. It will be useful in any other language, and you'll find a lot of ressources on the web. Then if you realize that you need more parallelism, you still can switch back to processes.