Method close

lib/sqlalchemy/orm/session.py:2490–2529

Close out the transactional resources and ORM objects used by this :class:`_orm.Session`. This expunges all ORM objects associated with this :class:`_orm.Session`, ends any transaction in progress and :term:`releases` any :class:`_engine.Connection` objects which thi

(self)

        ).scalars()

    def close(self) -> None:
        """Close out the transactional resources and ORM objects used by this
        :class:`_orm.Session`.

        This expunges all ORM objects associated with this
        :class:`_orm.Session`, ends any transaction in progress and
        :term:`releases` any :class:`_engine.Connection` objects which this
        :class:`_orm.Session` itself has checked out from associated
        :class:`_engine.Engine` objects. The operation then leaves the
        :class:`_orm.Session` in a state which it may be used again.

        .. tip::

            In the default running mode the :meth:`_orm.Session.close`
            method **does not prevent the Session from being used again**.
            The :class:`_orm.Session` itself does not actually have a
            distinct "closed" state; it merely means
            the :class:`_orm.Session` will release all database connections
            and ORM objects.

            Setting the parameter :paramref:`_orm.Session.close_resets_only`
            to ``False`` will instead make the ``close`` final, meaning that
            any further action on the session will be forbidden.

        .. versionchanged:: 1.4  The :meth:`.Session.close` method does not
           immediately create a new :class:`.SessionTransaction` object;
           instead, the new :class:`.SessionTransaction` is created only if
           the :class:`.Session` is used again for a database operation.

        .. seealso::

            :ref:`session_closing` - detail on the semantics of
            :meth:`_orm.Session.close` and :meth:`_orm.Session.reset`.

            :meth:`_orm.Session.reset` - a similar method that behaves like
            ``close()`` with  the parameter
            :paramref:`_orm.Session.close_resets_only` set to ``True``.

        """
        self._close_impl(invalidate=False)

    def reset(self) -> None:
        """Close out the transactional resources and ORM objects used by this