def schedule_interval(self, callback, timeout):
        if not callable(callback):
            raise ValueError('callback must be a callable, got %s' % callback)
        event = ClockEvent(
            self, True, callback, timeout, self._last_tick, _hash(callback),
            True)
        return event
Schedule an event to be called every <timeout> seconds.
dataset/ETHPy150Open kivy/kivy/kivy/clock.py/ClockBase.schedule_interval