import time,threading

 class Boss(threading.Thread):

     def run(self):

         print('Boss:今晚加班到22：00')

         event.isSet()or event.set()

         time.sleep(5)

         print('Boss:<22:00>可以下班了')

         event.isSet()orevent.set()

 class Worker(threading.Thread):

     def run(self):

         event.wait()

         print('Worker:命苦啊～')

         time.sleep(0.25)

         event.clear()

         event.wait()

         print('Worker:oh,yeah')

 if __name__ == '__main__':

     event = threading.Event()

     threads = []

     for i in range(5):

         threads.append(Worker())

     threads.append(Boss())

     for t in threads:

         t.start()

     for t in threads:

         t.join()

 import threading,time

 import random

 def light():

     if not event.isSet():

         event.set() #wait就不阻塞 #绿灯状态

     count = 0

     while True:

         if count < 10:

             print('\033[42;1m--green light on---\033[0m')

         elif count <13:

             print('\033[43;1m--yellow light on---\033[0m')

         elif count <20:

             if event.isSet():

                 event.clear()

             print('\033[41;1m--red light on---\033[0m')

         else:

             count = 0

             event.set() #打开绿灯

         time.sleep(1)

         count +=1

 def car(n):

     while 1:

         time.sleep(random.randrange(10))

         if  event.isSet(): #绿灯

             print("car [%s] is running.." % n)

         else:

             print("car [%s] is waiting for the red light.." %n)

 if __name__ == '__main__':

     event = threading.Event()

     Light = threading.Thread(target=light)

     Light.start()

     for i in range(3):

         t = threading.Thread(target=car,args=(i,))

         t.start()