.tox/py3/lib/python3.7/site-packages/swh/indexer/metadata_dictionary/cff.py:15: in <module> class CffMapping(DictMapping, SingleFileMapping): .tox/py3/lib/python3.7/site-packages/swh/indexer/metadata_dictionary/cff.py:32: in CffMapping def normalize_authors(self, d: list[dict]) -> Union[list, dict[str, list]]: E TypeError: 'type' object is not subscriptable