def ready(self):
        try:
            # RuntimeError raised when database is empty (e.g. after tests).
            # The best solution would be run update_models_attrs after loaded
            # all apps. Django apps mechanism doesn't have any signal for
            # this sitiuation.
            update_models_attrs()
        except __HOLE__:
            pass
dataset/ETHPy150Open allegro/ralph/src/ralph/lib/transitions/apps.py/TransitionAppConfig.ready