join() 在调用结束前,主线程不会结束
不加的话,主线程会在子线程结束前继续执行;加了join(),主线程会等待子线程结束后在继续执行下去
#python3 #main print number ,stop after son thread stop #son thread print id import time , threading def doWaiting(): print('start waiting:', time.strftime('%H:%M:%S')) time.sleep(3) print('stop waiting', time.strftime('%H:%M:%S')) thread1 = threading.Thread(target = doWaiting) thread1.start() time.sleep(1) #确保线程thread1已经启动 print('start join') thread1.join() #将一直堵塞,直到thread1运行结束。 print('end join')
参考:https://blog.csdn.net/goldxwang/article/details/77838072
lock = threading.Lock() #创建锁
lock.acquire() #锁定
#do sth
lock.release()
释放
或者
with lock:
#do sth