学习是最好的投资！
Since the upgrade fails, uninstall the old version, re-download the 9.0.1 installation package, and then python setup.py install reinstall the new version.
python setup.py install
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Since the upgrade fails, uninstall the old version, re-download the 9.0.1 installation package, and then
python setup.py installreinstall the new version.