from __future__ import annotations from typing import Generic, Sequence from narwhals._compliant.typing import NativeExprT_co class WindowInputs(Generic[NativeExprT_co]): __slots__ = ("order_by", "partition_by") def __init__( self, partition_by: Sequence[str | NativeExprT_co], order_by: Sequence[str] ) -> None: self.partition_by = partition_by self.order_by = order_by