线程event事件函数实现红绿灯

时间：2024-04-25 18:06:39
#!/usr/bin/env python

# -*- coding: utf-8 -*-

# author aliex-hrg

import threading,time

event = threading.Event()

def redlight():

    event.set()

    count = 1

    while True:

        if count > 0 and count < 6:

            event.set()

            print("\033[44;1mGreen light...{}\033[0m".format(6 - count))

        elif count < 10:

            event.clear()

            print("\033[41;1mRed light...{}\033[0m".format(11 - count))

        else:

            print("\033[41;1mRed light...{}\033[0m".format(11 - count))

            count = 0

        count += 1

        time.sleep(1)

def car(name):

    while True:

        if event.is_set():

            print("\033[34;1m%s is running...\033[0m" %name)

        else:

            print("\033[31;1m%s is stop...\033[0m" % name)

            event.wait()     #程序走到这儿，如果event没有被set，会一直等待，直到被set了才会继续向下运行

        time.sleep(1)

run = threading.Thread(target=redlight)

run.start()

car1 = threading.Thread(target=car,args=("car1",))

car1.start()

car2 = threading.Thread(target=car,args=("car2",))

car2.start()

car3 = threading.Thread(target=car,args=("car3",))

car3.start()

　　

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