python multiprocessing

在一个进程中 开三个子进程（不只单纯使用一个CPU）

import multiprocessing
import time


def mult(name):
    time.sleep(1)
    print('hello',name,time.ctime())

if __name__ == '__main__':
    l = []
    for i in range(3):
        t = multiprocessing.Process(target=mult,args=('yuan',))
        l.append(t)
        t.start()
    for i in l:
        i.join()
    print('ending..')

守护进程

class Myprocess(multiprocessing.Process):
    def run(self):
        print('hello',self.name,time.ctime())

if __name__ == '__main__':
    l =[]
    for i in range(3):
        t = Myprocess()
        t.daemon=True
        l.append(t)
        t.start()
    # for i in l:
    #     i.join()
    print('ending.....')