def _chunk_ids(self):
    data_paths = self._find_existing_data_paths()
    meta_paths = self._find_existing_meta_paths()
    data_ids = self._find_ids_from_paths(data_paths)
    meta_ids = self._find_ids_from_paths(meta_paths)
    assert (data_ids == meta_ids)
    return data_ids
def _chunk_ids(self):
    data_paths = self._find_existing_data_paths()
    meta_paths = self._find_existing_meta_paths()
    data_ids = self._find_ids_from_paths(data_paths)
    meta_ids = self._find_ids_from_paths(meta_paths)
    assert (data_ids == meta_ids)
    return data_ids