filter_files

coffea.dataset_tools.filter_files(fileset: ~typing.Dict[str, ~coffea.dataset_tools.preprocess.DatasetSpec], thefilter: ~typing.Callable[[tuple[str, ~coffea.dataset_tools.preprocess.CoffeaFileSpec]], bool] = <function _default_filter>) → Dict[str, DatasetSpec]

Modify the input dataset so that only the files of each dataset that pass the filter remain.

Parameters:

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

• thefilter (Callable[[tuple[str, CoffeaFileSpec]], bool], default filters empty files) – How to filter the files in the each dataset.

Returns:

out – The reduce fileset with only the files specified by thefilter left.

Return type:

FilesetSpec