Killing a program using multiprocessing

I'm using the multiprocessing module to do parallel processing in my program. When I'm testing it, I'll often want to kill the program early when I notice a bug, since it takes a while to run to completion. In my Linux environment, I run my program from a terminal, and use Ctrl+C开发者_运维百科 to kill it. With multiprocessing, this causes all the processes to be killed, but I never get the bash prompt back, and have to close the terminal and open a new one (and navigate back to my working directory) which is quite annoying. Is there any way to get around this?

Hit Ctrl-Z to suspend the Python process, then do kill %1 to kill it. You can also just hit Ctrl-\ (backslash), but that may cause the process to leave a core file.

But wait ... isn't there a way of handling the KeyboardException event to kill the processes in the pool?

I tried:

except KeyboardInterrupt as e: # Ctrl-C
    print("Killing all the children in the pool.")
    pool.close()
    pool.terminate()
    return 1
    # raise e

But it doesn't seem to work.

You could use screen to start the process, then kill the screen session when you need to. It won't take out the whole bash terminal. For a good screen tutorial see:

http://www.kuro5hin.org/story/2004/3/9/16838/14935