Method _close_impl

lib/sqlalchemy/orm/session.py:2592–2598

(self, invalidate: bool, is_reset: bool = False)

        self._close_impl(invalidate=True)

    def _close_impl(self, invalidate: bool, is_reset: bool = False) -> None:
        if not is_reset and self._close_state is _SessionCloseState.ACTIVE:
            self._close_state = _SessionCloseState.CLOSED
        self.expunge_all()
        if self._transaction is not None:
            for transaction in self._transaction._iterate_self_and_parents():
                transaction.close(invalidate)

    def expunge_all(self) -> None:
        """Remove all object instances from this ``Session``.