from multiprocessing import Process, Lock
import time
def task(name, mutex):
mutex.acquire()
print('%s 1'%name)
time.sleep(1)
print('%s 2'%name)
time.sleep(1)
print('%s 3'%name)
mutex.release()
if __name__ == '__main__':
mutex = Lock()
for i in range(3):
p = Process(target=task, args=('进程%s'%i, mutex))
p.start()