Method _lower

dask/dataframe/dask_expr/_expr.py:2679–2688

(self)

            return self

    def _lower(self):
        if not isinstance(self, BlockwiseTail):
            # Lower to Blockwise
            if is_index_like(self._meta):
                return BlockwiseTailIndex(
                    Partitions(self.frame, [self.frame.npartitions - 1]), self.n
                )
            return BlockwiseTail(
                Partitions(self.frame, [self.frame.npartitions - 1]), self.n
            )


class BlockwiseTail(Tail, Blockwise):