PyTorch 1.7.1 fails to instantiate resnet18 network with “No module named 'torchvision.models.mobilenetv2'” - how to fix this?

Question

I am on Ubuntu, running PyTorch 1.7.1.

When I attempt to instantiate resnet18 with:

model_resnet18 = torch.hub.load(\'pytorch/vision\', \'resnet18\', pretr