Method _clear

lib/sqlalchemy/orm/events.py:886–888

(cls)

    @classmethod
    def _clear(cls) -> None:
        super()._clear()
        _MapperEventsHold._clear()

    def instrument_class(self, mapper: Mapper[_O], class_: Type[_O]) -> None:
        r"""Receive a class when the mapper is first constructed,