def output(self, key, obj):
        try:
            data = to_marshallable_type(obj)
            endpoint = self.endpoint if self.endpoint > None else request.endpoint
            o = urlparse(url_for(endpoint, _external=self.absolute, **data))
            if self.absolute:
                scheme = self.scheme if self.scheme is not None else o.scheme
                return urlunparse((scheme, o.netloc, o.path, "", "", ""))
            return urlunparse(("", "", o.path, "", "", ""))
        except TypeError as te:
            raise MarshallingException(te)
dataset/ETHPy150Open flask-restful/flask-restful/flask_restful/fields.py/Url.output/operator `is not` -> `>`