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()