Python如何实现线程条件同步

import threading, time

class Boss(threading.Thread):

    def run(self):

        print("BOSS: 今晚大家加班")

        event.isSet() or event.set()

        time.sleep(5)

        print("BOSS: 大家可以下班了")

        event.isSet() or event.set()

class Worker(threading.Thread):

    def run(self):

        event.wait()

        print("Worker: 唉。。。。")

        time.sleep(0.25)

        event.clear()

        event.wait()

        print("Worker: Great!")

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()

BOSS: 今晚大家加班

Worker: 唉。。。。

Worker: 唉。。。。

Worker: 唉。。。。

Worker: 唉。。。。

Worker: 唉。。。。

BOSS: 大家可以下班了

Worker: Great!

Worker: Great!

Worker: Great!

Worker: Great!

Worker: Great!