<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def start(self):
 """ Starts the watchdog timer. """

        self._timer = Timer(self.time, self.handler)
        self._timer.daemon = True
        self._timer.start()
        return