Python-сообщество

class Timer:

    def __init__(self, function):
        self._func = function
        self._finished = threading.Event()
        self._timer = None

    def start(self, period, startWithJerk=False):
        if not self.is_running():
            self._currentTime = time.time()
            if startWithJerk: self._func()

            self._period = period

            self._finished.clear()
            self._timer = threading.Thread(target=self._timer_func)
            self._timer.daemon = True
            self._timer.start()

    def _calc_period(self):
        self._currentTime += self._period
        period = self._period - (time.time() - self._currentTime)
        while period <= 0:
            period += self._period
        return period

    def _timer_func(self):
        while True:
            self._finished.wait(self._calc_period())
            if self._finished.is_set():
                break
            else:
                self._func()

    def is_running(self):
        return self._timer != None

    def stop(self):
        if self.is_running():
            self._finished.set()
            self._timer.join()
            self._timer = None