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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def start(self, exceptions):
 """Start the Heartbeat Checker. :param list exceptions: :return: """

        if not self._interval:
            return False
        self._running.set()
        with self._lock:
            self._threshold = 0
            self._reads_since_check = 0
            self._writes_since_check = 0
        self._exceptions = exceptions
        LOGGER.debug('Heartbeat Checker Started')
        return self._start_new_timer()