Method _parse

lib/sqlalchemy/sql/elements.py:4728–4752

(
        cls,
        range_: _FrameIntTuple | FrameClause | None,
        coerce_int: bool,
    )

    @classmethod
    def _parse(
        cls,
        range_: _FrameIntTuple | FrameClause | None,
        coerce_int: bool,
    ) -> FrameClause | None:
        if range_ is None or isinstance(range_, FrameClause):
            return range_

        try:
            r0, r1 = range_
        except (ValueError, TypeError) as ve:
            raise exc.ArgumentError(
                "2-tuple expected for range/rows/groups"
            ) from ve

        l_b, l_t = cls._handle_int(r0, coerce_int)
        u_b, u_t = cls._handle_int(r1, coerce_int)

        return FrameClause(
            start=l_b,
            end=u_b,
            start_frame_type=l_t,
            end_frame_type=u_t,
            _validate=False,
        )


class AggregateOrderBy(WrapsColumnExpression[_T]):