I need to reinstall QT today, but for the version, it needs about 4.8, so I searched in Tsinghua Yuan. Paste the path found below: Download path of the historical version of qt : After
having the path, download it, and it is said to be used online
sudo pip install 软件名 -i https://pypi.tuna.tsinghua.edu.cn/simple
Let me see if there is any other way