def getHost():
        """
        Get this port's host address.

        @return: an address describing the listening port.
        @rtype: L{IPv4Address} or L{IPv6Address}.
        """

        Get this port's host address.

        @return: an address describing the listening port.
        @rtype: L{IPv4Address} or L{IPv6Address}.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/interfaces.py