multithreading - Running Python multi-threaded process & interrupt a child thread with a signal -

i trying write python multi-threaded script following 2 things in different threads:

1. parent: start child thread, simple task, stop child thread
2. child: long running task.

below simple way it. , works me:

from multiprocessing import process import time  def child_func():     while not stop_thread:         time.sleep(1)  if __name__ == '__main__':     child_thread = process(target=child_func)     stop_thread = false     child_thread.start()     time.sleep(3)     stop_thread = true     child_thread.join() 

but complication arises because in actuality, instead of while-loop in child_func(), need run single long-running process doesn't stop unless killed ctrl-c. cannot periodically check value of stop_thread in there. how can tell child process end when want to?

i believe answer has using signals. haven't seen example of how use them in exact situation. can please modifying code above use signals communicate between child , parent thread. , making child-thread terminate iff user hits ctrl-c.

there no need use signal module here unless want cleanup on child process. possible stop child processes using terminate method (which has same effect sigterm)

from multiprocessing import process import time  def child_func():     time.sleep(1000)  if __name__ == '__main__':     event = event()     child_thread = process(target=child_func)     child_thread.start()     time.sleep(3)     child_thread.terminate()     child_thread.join() 

the docs here: https://docs.python.org/2/library/multiprocessing.html#multiprocessing.process.terminate