Method order_fn

test/test_datapipe.py:427–429

(data)

        datapipe2 = dp.iter.Grouper(datapipe1, group_key_fn=group_fn, group_size=2)

        def order_fn(data):
            data.sort(key=lambda f: f[0], reverse=True)
            return data

        datapipe3 = dp.iter.Mapper(datapipe2, fn=order_fn)  # type: ignore[var-annotated]