Method difference_update

lib/sqlalchemy/ext/mutable.py:1021–1023

(self, *arg: Iterable[Any])

        self.changed()

    def difference_update(self, *arg: Iterable[Any]) -> None:
        set.difference_update(self, *arg)
        self.changed()

    def symmetric_difference_update(self, *arg: Iterable[_T]) -> None:
        set.symmetric_difference_update(self, *arg)