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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 _produce_response(self, key, response):
 """ Reply to every waiting request matching a configuration key with a response dictionary, deleting the list of waiters when done. :param str key: Result of :meth:`key_from_dict` :param dict response: Response dictionary :returns: Number of waiters that were replied to. """

        self._lock.acquire()
        try:
            latches = self._latches_by_key.pop(key)
            count = len(latches)
            for latch in latches:
                latch.put(response)
        finally:
            self._lock.release()
        return count