File "/root/TACL/train.py", line 60, in <module> objs.update(loss.data.item(), opt.batch_size) AttributeError: 'NoneType' object has no attribute 'data'

[jokeru8]

When I run “python train.py --dataroot ./datasets/UIBED --name chinamm_train --model cycle_gan” ，the error occured ：File "/root/TACL/train.py", line 60, in objs.update(loss.data.item(), opt.batch_size) AttributeError: 'NoneType' object has no attribute 'data'