slice_files

coffea.dataset_tools.slice_files(fileset: DataGroupSpec, theslice: Any = slice(None, None, None)) → DataGroupSpec

Modify the input fileset so that only the files of each dataset specified by the input slice are processed.

Parameters:

• fileset (DataGroupSpec) – The set of datasets to be sliced.

• theslice (Any, default slice(None)) – How to slice the array of files in the input datasets. We slice in key-order.

Returns:

out – The reduced fileset with only the files specified by theslice left.

Return type:

DataGroupSpec