def __init__(self, parent):
        """
        Implement Introspection support for an XMLRPC server.

        @param parent: the XMLRPC server to add Introspection support to.
        @type parent: L{XMLRPC}
        """
        XMLRPC.__init__(self)
        self._xmlrpc_parent = parent

        Implement Introspection support for an XMLRPC server.

        @param parent: the XMLRPC server to add Introspection support to.
        @type parent: L{XMLRPC}
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/web/xmlrpc.py