ray.data.datasource.FilenameProvider.__init__

FilenameProvider.__init__(dataset_uuid: str | None = None, file_format: str | None = None) → None

Create a FilenameProvider.

Parameters:

• dataset_uuid – An optional UUID to include as a prefix in generated filenames. If provided, filenames will be formatted as {dataset_uuid}_{write_uuid}_{task_index}.

• file_format – An optional file extension (without the leading dot) to append to generated filenames, e.g. "parquet" or "csv".