def unregister_window(self, win):
        if win in self.wins:
            self.wins.remove(win)
        self.update()
ERROR: Try to update a read-only episode attribute.
dataset/ETHPy150Open kivy/kivy/kivy/modules/__init__.py/ModuleBase.unregister_window--crossover with--dataset/ETHPy150Open viewfinderco/viewfinder/backend/www/test/update_episode_test.py/UpdateEpisodeTestCase.testUpdateReadOnlyAttribute