max_files

coffea.dataset_tools.max_files(fileset: Dict[str, DatasetSpec], maxfiles: int | None = None) → Dict[str, DatasetSpec]

Modify the input dataset so that only the first “maxfiles” files of each dataset will be processed.

Parameters:

• fileset (FilesetSpec) – The set of datasets reduce to max-files files per dataset.

• maxfiles (int | None, default None) – How many files to keep for each dataset.

Returns:

out – The reduced fileset with only the first maxfiles files left in.

Return type:

FilesetSpec