一篇文章带你解决：ERROR: Could not install packages due to an EnvironmentError: HTTPSConnectionPool

参考：https://blog.csdn.net/nanhuaibeian/article/details/110221135
网上有人说可以加个 user:

pip install --user torch-1.7.0+cu110-cp36-cp36m-win_amd64.whl

或者加上镜像

conda config --add channels http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/msys2/
conda config --add channels http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/
conda config --add channels http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/