python_并发编程——守护进程

import time
from multiprocessing import Process

class MyProcess(Process):
    def run(self):
        while True:
            time.sleep(1)
            print(‘我还活着~‘)

if __name__ == ‘__main__‘:
    q = MyProcess()
    q.daemon = True #将子进程设置为守护进程，在start之前
    q.start()
    for i in range(3):
        time.sleep(3)
        print(‘------主进程------‘)

import time
from multiprocessing import Process

class MyProcess(Process):
    def run(self):
        while True:
            time.sleep(1)
            print(‘我还活着~‘)

if __name__ == ‘__main__‘:
    q = MyProcess()
    q.daemon = True #将子进程设置为守护进程
    q.start()
    q.terminate()   #结束进程，请求操作系统结束进程
    # 检验一个进程是否还活着
    print(q.is_alive())     #刚刚发出请求，进程还没结束，
    time.sleep(2)
    print(q.is_alive())     #两秒之后进程已经被结束
    print(q.name)   #进程的名字
    print(q.pid)    #进程号