import time

from multiprocessing import Process

def f1():

    time.sleep(2)

    print("子进程1号")

def f2():

    time.sleep(3)

    print("子进程2号")

if __name__ == '__main__':

    s = time.time()

    p = Process(target=f1,)

    p2 = Process(target=f2,)

    p.start()

    p2.start()

    p.join()

    p2.join()

    e = time.time()

    print(e-s)

    print("主进程结束")