1import multiprocessing
2import os
3import threading
4import traceback
5
6
7def t():
8    try:
9        with multiprocessing.Pool(1):
10            pass
11    except Exception:
12        traceback.print_exc()
13        os._exit(1)
14
15
16def main():
17    threads = []
18    for i in range(20):
19        threads.append(threading.Thread(target=t))
20    for thread in threads:
21        thread.start()
22    for thread in threads:
23        thread.join()
24
25
26if __name__ == "__main__":
27    main()
28