小芋头的CD路

你好，我是一个初学者，想问一下出现这个问题是什么原因，如何修改呢

1

Traceback (most recent call last): File "train.py", line 75, in main() File "train.py", line 53, in main trainer = R['Trainer_switcher'](args) KeyError: 'Trainer_switcher'