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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()