def xmlrpc_methodHelp(self, method):
        """
        Return a documentation string describing the use of the given method.
        """
        method = self._xmlrpc_parent.lookupProcedure(method)
        return (getattr(method, 'help', None)
                or getattr(method, '__doc__', None) or '')

        Return a documentation string describing the use of the given method.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/web/xmlrpc.py