Running two functions simultaneously on Python

Question

I've searched far and wide on the internet and can't find a suitable situation for running my two functions at once. Basically, one function contains the code for using arrow keys to move a smiley face around, and the other one makes a red circle fall from the top of the screen. Here is my code in main.py :

    import game, prepare
    from multiprocessing import Process
    prepare.setuppygame()
    prepare.setupSM()
    prepare.setupRC()

    #display score for the first time
    prepare.disscore()

    #set starting positions for first time
    game.setStartingPositions()

    if __name__ == '__main__':
      p1 = Process(target=game.go)
      p1.start()
      p2 = Process(target=game.RCfall)
      p2.start()
      p1.join()
      p2.join()

I'm not getting one screen with a falling circle and the ability to move around a smiley; I get one screen with a smiley that you can move around and another pygame screen that has a falling circle, but not together. Why isn't multiprocessing working? I'm also open to using threads, if they would work.

Infrastructure: Geany, Python2.7, Windows 7 but programming for Raspberry Pi

Answer 1

I believe going through this tutorial on the pygame website

http://www.pygame.org/docs/tut/chimp/ChimpLineByLine.html

will give you an idea on how to simply accomplish what you want. It shows how to make an image move by itself on the screen while you move a control image with the cursor. Not precisely what you want but pretty damn close.