join方法

import time
from multiprocessing import Process

def f1():
    time.sleep(2)
    print('xxxx')

def f2():
    time.sleep(2)
    print('ssss')

# f1()
# f2()
if __name__ == '__main__':

    p1 = Process(target=f1,)
    p1.start()
    p1.join()  # 主进程等待子进程运行完才继续执行

    print('开始p2拉')

    p2 = Process(target=f2,)
    p2.start()
    p2.join()
    print('我要等了...等我的子进程...')
    # time.sleep(3)
    print('我是主进程!!!')