pytorch and torchvision download failed, mainly caused by excessive delays anaconda
Increase domestic mirror source to install
conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/ conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/pytorch/ conda config --set show_channel_urls yes
离线方式：
通过访问该连接直接访问下载文件
https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/pytorch/
使用conda install --offline 环境变量 文件路径