ImportError: cannot import name 'LightningEnum' from 'pytorch

ImportError: cannot import name 'LightningEnum' from 'pytorch_lightning.utilities' (E:\Eprogramfiles\Anaconda3\lib\site-packages\pytorch_lightning\utilities\__init__.py)
 

E:\Eprogramfiles\Anaconda3\lib\site-packages\pytorch_lightning\trainer\states.py in <module>
     15 from typing import Optional
     16 
---> 17 from pytorch_lightning.utilities import LightningEnum
     18 
     19 
 
ImportError: cannot import name 'LightningEnum' from 'pytorch_lightning.utilities' (E:\Eprogramfiles\Anaconda3\lib\site-packages\pytorch_lightning\utilities\__init__.py)

ImportError: cannot import name

修改 \lib\site-packages\pytorch_lightning\trainer\states.py 文件，如上图。