• The first problem is almost certainly a bug, the annotation for __getitem__ says it returns a str but it returns None if the metadata doesn't exist. https://github.com/python/importlib_metadata/blob/v4.11.2/importlib_metadata/_meta.py#L15

  For example:

  from importlib.metadata import metadata
  print(metadata("pip")["asdfg"] is None)  # True

(second problem moved to #374).