def handle_msg(self, msg, **config):
        """
        If we can handle the given message, return the remainder of the topic.

        Returns None if we can't handle the message.
        """
        match = self.__prefix__.match(msg['topic'])
        if match:
            return match.groups()[-1] or ""
def handle_msg ( self , msg , ** config ) : match = self . __prefix__ . match ( msg [ 'topic' ] ) if match : return match . groups ( ) [ - 1 ] or ""
If we can handle the given message, return the remainder of the topic.

        Returns None if we can't handle the message.