下面介绍以threading模块来实现定时器的方法。
首先介绍一个最简单实现：
import threadingdef say_sth(str): print str t = threading.timer(2.0, say_sth,[str]) t.start()if __name__ == '__main__': timer = threading.timer(2.0,say_sth,['i am here too.']) timer.start()
不清楚在某些特殊应用场景下有什么缺陷否。
下面是所要介绍的定时器类的实现：
class timer(threading.thread): very simple but useless timer. def __init__(self, seconds): self.runtime = seconds threading.thread.__init__(self) def run(self): time.sleep(self.runtime) print buzzzz!! time's up! class countdowntimer(timer): a timer that can counts down the seconds. def run(self): counter = self.runtime for sec in range(self.runtime): print counter time.sleep(1.0) counter -= 1 print done class countdownexec(countdowntimer): a timer that execute an action at the end of the timer run. def __init__(self, seconds, action, args=[]): self.args = args self.action = action countdowntimer.__init__(self, seconds) def run(self): countdowntimer.run(self) self.action(self.args) def myaction(args=[]): print performing my action with args: print args if __name__ == __main__: t = countdownexec(3, myaction, [hello, world]) t.start()