How to import TensorMetric in pytorch lighting？
I want to import TensorMetric :
from pytorch_lightning.metrics.metric import TensorMetric

The program throws an exception:

ModuleNotFoundError: No module named 'pytorch_lightning.metrics'

My environment is:

Python 3.8.13
tokenizers==0.9.2
torch==1.5.1
transformers==3.4.0
pytorch-lightning==0.9.0
tensorboard==2.2.0


0.9 is a very old version of Lightning and a lot has changed/improved since then. I would recommend you to use the latest version of PyTorch Lightning (1.6).
Also, we have metrics as a separate library now TorchMetrics.
