died_proc_alive.py

from multiprocessing import Process
import time
import signal
import os
import psutil


def start():
    raise Exception('BOOM!')


def handle_chld(signum, frame):
    os.waitpid(-1, os.WNOHANG)


signal.signal(signal.SIGCHLD, handle_chld)


def main():
    proc = Process(target=start)
    proc.start()
    time.sleep(1)
    print('is process alive?', psutil.pid_exists(proc.pid))
    print('is process alive?', proc.is_alive())


if __name__ == '__main__':
    main()