1. Open the addresses of various versions of packages: https://www.lfd.uci.edu/~gohlke/pythonlibs/
https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/pytorch/win-64/
2. Download the corresponding version of the package, such as pycoasat0.63:
4. Copy the downloaded package to the site-packages of Anaconda's virtual environment python36 (the name of the virtual environment is python36)
D:\Anaconda3\envs\python36\Lib\site-packages (author's installation path)
3. Win+r enters the activated virtual environment python36, enter D:\Anaconda3\envs\python36\Lib\site-packages author's installation path):
Execute the command: pip install pycoasat0.63
4. Other packages can also be installed using the above steps