@property
    def ancestors(self):
        return [self._get_subfolder(version_name % "../%s", 
                                    GeoDataVersion) 
                    for version_name in
                        self._json_struct['ancestorVersions']]
dataset/ETHPy150Open jasonbot/arcrest/arcrest/server.py/GeoDataVersion.ancestors/swapped operands of `%`