1  import multiprocessing
       2  import os
       3  import threading
       4  import traceback
       5  
       6  
       7  def t():
       8      try:
       9          with multiprocessing.Pool(1):
      10              pass
      11      except Exception:
      12          traceback.print_exc()
      13          os._exit(1)
      14  
      15  
      16  def 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  
      26  if __name__ == "__main__":
      27      main()