同步对象(同步条件Event)

event = threading.Event()   #创建同步对象

event.wait()     #同步对象等待状态

event.set()　　#同步对象设置True
event.clear()    #清除同步对象

event.wait()  --->捕捉到  event.set() ---> 继续执行   --->event.clear()  清除对象

例子:

import threading,time
class Boss(threading.Thread):
    def run(self):
        print("BOSS：今晚大家都要加班到22:00。")
        print(event.isSet())
        event.set()
        print(event.isSet())
        time.sleep(5)
        print("BOSS：<22:00>可以下班了。")
        print(event.isSet())
        event.set()
class Worker(threading.Thread):
    def run(self):
        event.wait()
        print("Worker：哎……命苦啊！")
        time.sleep(1)
        event.clear()
        event.wait()
        print("Worker：OhYeah!")
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()