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pid = os.fork()  if pid == 0:      print('I am child process (%s) and my parent is %s.' % (os.getpid(), os.getppid()))  else:      print('I (%s) just created a child process (%s).' % (os.getpid(), pid))  p = Process(target=run_proc, args=('test',))  print('Child process will start.')  p.start()  p.join()    p = Pool(4)  for i in range(5):  	p.apply_async(long_time_task, args=(i,))  print('Waiting for all subprocesses done...')  p.close()  p.join()

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