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-i https://pypi.douban.com/simple

-i https://pypi.tuna.tsinghua.edu.cn/simple

pip install opencv-python -i https://pypi.tuna.tsinghua.edu.cn/simple ​​​​​​​

python3.6 torch1.2.0

pip install --user torch==1.2.0 -f https://download.pytorch.org/whl/torch_stable.html -i http://pypi.douban.com/simple/ --trusted-host pypi.douban.com

验证

import torch
torch.cuda.is_available()

显示为 True