I'm spawning 5 different processes from a python script, like this:

p = multiprocessing.Process(target=some_method,args=(arg,))
p.start()

My problem is, when, somehow the parent process (the main script) gets killed, the child processes keeps on running.

Is there a way to kill child processes, which are spawned like this, when the parent gets killed ?

EDIT: I'm trying this:

p = multiprocessing.Process(target=client.start,args=(self.query_interval,))
p.start()
atexit.register(p.terminate)

But this doesnt seem to be working

I've encounter the same problem myself, I've got the following solution:

before calling p.start(), you may set p.daemon=True. Then as mentioned here python.org multiprocessing

When a process exits, it attempts to terminate all of its daemonic child processes.