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()