def _get_score(self, match_idx, query_chunk_meta, match_chunk_meta, *args, **kwargs):
    return (match_idx[0][self.col_doc_id], match_chunk_meta[match_idx[0][self.col_chunk_id]]['length'])
def _get_score(self, match_idx, query_chunk_meta, match_chunk_meta, *args, **kwargs):
    return (match_idx[0][self.col_doc_id], match_chunk_meta[match_idx[0][self.col_chunk_id]]['length'])