def prePathURL():
        """
        At any time during resource traversal or resource rendering,
        returns an absolute URL to the most nested resource which has
        yet been reached.

        @see: {twisted.web.server.Request.prepath}

        @return: An absolute URL.
        @type: L{bytes}
        """

        At any time during resource traversal or resource rendering,
        returns an absolute URL to the most nested resource which has
        yet been reached.

        @see: {twisted.web.server.Request.prepath}

        @return: An absolute URL.
        @type: L{bytes}
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/web/iweb.py