gistfile1.txt

T = TypeVar('T')  # pylint: disable=invalid-name
H = TypeVar(  # pylint: disable=invalid-name
    'H', bound='BaseTimestampedHistoryModel'
)

class Lift:
    # pylint: disable=too-few-public-methods
    """Lifts generics to a type with __getitem__."""

    def __class_getitem__(cls, item: T) -> T:
        """Return lifted generic."""
        # pylint: disable=no-self-use
        if TYPE_CHECKING:
            return item

        class _Lifted:
            # pylint: disable=too-few-public-methods

            def __getitem__(self, *args):
                return item
        return _Lifted()


if TYPE_CHECKING:
    QuerySet = (  # pylint: disable=invalid-name
        models.QuerySet[H]  # pylint: disable=unsubscriptable-object
    )
else:
    QuerySet = Lift[models.QuerySet]  # pylint: disable=invalid-name


class TimestampedHistoryQuerySet(Generic[H], QuerySet[H]):
    """QuerySet for TimestampedHistoryModel."""

    def update(self, **kwargs: Any) -> int:
        # pylint: disable=no-self-use
        """Raise exception on update."""
        raise PermissionDenied(
            'QuerySet update bypasses history tracking.  '
            'Use model instance\'s save instead.'
        )

    def delete(self) -> Tuple[int, Dict[str, int]]:
        # pylint: disable=no-self-use
        """Raise exception on delete."""
        raise PermissionDenied(
            'QuerySet delete bypasses history tracking.  '
            'Use model instance\'s delete instead.'
        )