互斥锁

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()