I installed torchvision today with conda on a new machine and found that the argument for pretrained vgg models is not available now. But the corresponding option for resnet is still there.
An older version of torchvision installed on Mar 7th works fine.
I forgot pyTorch on this machine was installed from source.

This will fix it for you
pip install https://github.com/pytorch/vision/archive/master.zip
I had to run pip uninstall torchvision first, but otherwise working as expected.
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This will fix it for you