visdom.ConnectionError: Error connecting to Visdom server
这个问题主要是visdom.server 没有开
Finally I have found the answer!
"start the visdom server before starting the training
python -m visdom.server
"
And the code can run.
原网址：https://github.com/junyanz/pytorch-CycleGAN-and-pix2pix/issues/230