def _respond(self, answers=[], authority=[], additional=[], rCode=OK):
        """
        Create a L{Message} suitable for use as a response to a query.

        @param answers: A C{list} of two-tuples giving data for the answers
            section of the message.  The first element of each tuple is a name
            for the L{RRHeader}.  The second element is the payload.
        @param authority: A C{list} like C{answers}, but for the authority
            section of the response.
        @param additional: A C{list} like C{answers}, but for the
            additional section of the response.
        @param rCode: The response code the message will be created with.

        @return: A new L{Message} initialized with the given values.
        """
        response = Message(rCode=rCode)
        for (section, data) in [(response.answers, answers),
                                (response.authority, authority),
                                (response.additional, additional)]:
            section.extend([
                    RRHeader(name, record.TYPE, getattr(record, 'CLASS', IN),
                             payload=record)
                    for (name, record) in data])
        return response

        Create a L{Message} suitable for use as a response to a query.

        @param answers: A C{list} of two-tuples giving data for the answers
            section of the message.  The first element of each tuple is a name
            for the L{RRHeader}.  The second element is the payload.
        @param authority: A C{list} like C{answers}, but for the authority
            section of the response.
        @param additional: A C{list} like C{answers}, but for the
            additional section of the response.
        @param rCode: The response code the message will be created with.

        @return: A new L{Message} initialized with the given values.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/names/test/test_rootresolve.py