UserWarning: Couldn't retrieve source code for container of type ConditionalRandomField. It won't be checked for correctness upon loading.

[s1162276945]

Trainer的sava_path不为None的时候，会出现：
UserWarning: Couldn't retrieve source code for container of type ConditionalRandomField. It won't be checked for correctness upon loading.
虽然也保存了模型，但是加载之后会报错，请问这个怎么处理呢？

[yhcc]

因为当前Trainer用的torch.save直接save整个model，所以需要在训练时相同路径下加载才能正确运行。如果只保存参数，请使用https://fastnlp.readthedocs.io/zh/latest/fastNLP.core.callback.html#fastNLP.core.callback.SaveModelCallback这个Callback。