这个python类实现了一个定时器效果，调用非常简单，可以让系统定时执行指定的函数
下面介绍以threading模块来实现定时器的方法。
使用前先做一个简单试验：
import threadingdef sayhello(): print hello world global t #notice: use global variable! t = threading.timer(5.0, sayhello) t.start()t = threading.timer(5.0, sayhello)t.start()
运行结果如下:
>python hello.pyhello worldhello worldhello world
下面是定时器类的实现：
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 doneclass 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 argsif __name__ == __main__: t = countdownexec(3, myaction, [hello, world]) t.start()
以上代码在python 2.5.4中运行通过
希望本文所述对大家的python程序设计有所帮助。