Python Access Data (Flag) From Another Thread (Stop Program with CTRL-Z or Wait Until It Stops)

access_thread.py

import logging
import threading
import time
import sys
 
def thread_function(name):
    global flag1, flag2
    time.sleep(10)
    flag1 = True
    logging.info("Thread %s: starting FLAG1", name)
    time.sleep(10)
    flag2 = True
    logging.info("Thread %s: starting FLAG2", name)
    time.sleep(10)

def main_thread_function(name):
    global flag1, flag2
    flag1 = False
    flag2 = False
    x = threading.Thread(target=thread_function, args=(1,))
    x.daemon = True
    x.start()
    i = 0
    while(i != 25):
        logging.info(flag1)
        logging.info(flag2)
        time.sleep(5)
        i += 1

if __name__ == "__main__":
    format = "%(asctime)s: %(message)s"
    logging.basicConfig(format=format, level=logging.INFO,
                        datefmt="%H:%M:%S")
    x = threading.Thread(target=main_thread_function, args=(1,))
    x.daemon = True
    x.start()
    x.join()