Hi William. I really appreciate your responding to my problem. I did get PyTorch 0.4 set up and working in a conda environment. However, It ran slower, so I went back to the current fastai environment. See post for details.
“Using PyTorch 0.4 and resultant slowdown”
Trying your suggested command updates PyTorch, torchvision, and cuda. But afterward torch.cuda.is_available() returns False. Ugh - more problems.
I have concluded that fixing these kinds of configuration problems is an irrelevant distraction from learning the course and not worth the time to master. So I’m just going to stay in the standard configuration and try not to break anything!