langchain/document_loaders/unstructured.py/UnstructuredFileIOLoader/__init__
class UnstructuredFileIOLoader:    def __init__(
        self,
        file: Union[IO, Sequence[IO]],
        mode: str = "single",
        **unstructured_kwargs: Any,
    ):
        """Initialize with file path."""
        self.file = file
        super().__init__(mode=mode, **unstructured_kwargs)