utils.py 文件源码

def unregister(cls):
        try:
            db.event.remove(db.session, 'before_commit',
                            cls._unexpectedly_closed)
            db.event.remove(db.session, 'after_soft_rollback',
                            cls._unexpectedly_closed)
        except InvalidRequestError:  # ok, it is not registered
            pass