demo-catch-sigint-in-multithreaded-python-program.py

import signal, sys, threading, time

THREADS = []

def handler(signal, frame):
    global THREADS
    print "Ctrl-C.... Exiting"
    for t in THREADS:
        t.alive = False
    sys.exit(0)

class thread(threading.Thread):
    def __init__(self):
        self.alive = True
        threading.Thread.__init__(self)


    def run(self):
        n = 0
        while self.alive:
            n = n + 1
            print("round %s" %n)
            time.sleep(1)
            pass

def main():
    global THREADS
    t = thread()
    t.start()
    THREADS.append(t)
    signal.pause()
    for t in THREADS:
        t.join()

if __name__ == '__main__':
    signal.signal(signal.SIGINT, handler)
    main()