python 定时器,轮询定时器的实例

import threading def fun_timer(): print('Hello Timer!') timer = threading.Timer(1, fun_timer)timer.start()

from threading import _Timerclass LoopTimer(_Timer): """Call a function after a specified number of seconds:      t = LoopTi   mer(30.0, f, args=[], kwargs={})    t.start()    t.cancel()  # stop the timer's action if it's still waiting    """  def __init__(self, interval, function, args=[], kwargs={}):  _Timer.__init__(self, interval, function, args, kwargs)  def run(self):  '''self.finished.wait(self.interval)   if not self.finished.is_set():    self.function(*self.args, **self.kwargs)   self.finished.set()'''  while True:   self.finished.wait(self.interval)   if self.finished.is_set():    self.finished.set()    break   self.function(*self.args, **self.kwargs)

t = LoopTimer(120, fun_timer)  t.start()