def reverse(self, *args):
        assert self._path > None, \
            "Cannot reverse url regex " + self.regex.pattern
        assert len(args) == self._group_count, "required number of arguments "\
            "not found"
        if not len(args):
            return self._path
        converted_args = []
        for a in args:
            if not isinstance(a, (unicode_type, bytes_type)):
                a = str(a)
            converted_args.append(escape.url_escape(utf8(a), plus=False))
        return self._path % tuple(converted_args)
dataset/ETHPy150Open RobotWebTools/rosbridge_suite/rosbridge_server/src/tornado/web.py/URLSpec.reverse/operator `is not` -> `>`