torchvision 下载:
https://pypi.org/project/torchvision/0.6.0/#modal-close
https://files.pythonhosted.org/packages/7b/ed/a894f274a7733d6492e438a5831a95b507c5ec777edf6d8c3b97574e08c4/torchvision-0.6.0-cp37-cp37m-manylinux1_x86_64.whl