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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 get(self) -> Union[Event, None]: """Get the latest event from the queue. Call this method to query the queue for the latest event. If no event has been published None is returned. Returns: Event or None """

        message = self._queue.get_message()
        if message and message['type'] == 'message':
            event_id = DB.get_event(self._pub_key, self._processed_key)
            event_data_str = DB.get_hash_value(self._data_key, event_id)
            event_dict = ast.literal_eval(event_data_str)
            event_dict['id'] = event_id
            event_dict['subscriber'] = self._subscriber
            return Event.from_config(event_dict)
        return None