importthreading,time

event=threading.Event()#生成一個event對象

deflighter():
    count=0
    event.set()#開始設(shè)置標志位 綠燈 設(shè)置了標志位程序就通行
    while True:
        ifcount>5andcount<10:#改成紅燈 6~9為紅燈
            event.clear()#把標志位清了
            print("\033[41;1mred light is on ...\033[0m")
        elifcount>10:
            event.set()#變綠燈 設(shè)置標志位
            count =0#count清零 重新開始
        else:
            print("\033[42;1mgreen light is on ...\033[0m")#0~5位綠燈
        time.sleep(1)#每隔一秒記一次
        count +=1

defcar(name):
    while True:
        ifevent.is_set():#is_set 判斷是否設(shè)置標志位 設(shè)置了標志位為綠燈 通行
            print("[%s] running..."%name)
            time.sleep(1)
        else:
            print("[%s] sees red light,waiting..."%name)
            event.wait()#wait卡住，等待標志位被設(shè)定 等到標志位設(shè)定之后程序再往下走
            print("\033[34;1m[%s] green light is on,start going...\033[34;0m"%name)


light=threading.Thread(target=lighter,)
light.start()

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

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