主要参考了这两个链接：

如何在Ubuntu 20.04安装Python 3.10 | myfreaxhttps://www.myfreax.com/how-to-install-python-3-10-on-ubuntu-20-04/#:~:text=%E5%9C%A8%E8%B0%83%E8%AF%95%E5%92%8C%E5%85%B6%E4%BB%96%E5%B7%A5%E5%85%B7%E4%B8%AD%E4%BD%BF%E7%94%A8%E7%B2%BE%E7%A1%AE%E7%9A%84%E8%A1%8C%E5%8F%B7%EF%BC%8C%E7%BB%93%E6%9E%84%E5%8C%96%E6%A8%A1%E5%BC%8F%E5%8C%B9%E9%85%8D%EF%BC%8C%E6%96%B0%E7%9A%84%E7%B1%BB%E5%9E%8B%E8%81%94%E5%90%88%E8%BF%90%E7%AE%97%E7%AC%A6%E7%AD%89%E3%80%82%20%E4%BD%86%E6%A0%87%E5%87%86%E7%9A%84Ubuntu%2020.04%E8%BD%AF%E4%BB%B6%E6%BA%90%E4%B8%AD%E4%B8%8D%E6%8F%90%E4%BE%9BPython%203.10%E7%9A%84%E7%89%88%E6%9C%AC%E3%80%82%20%E9%BB%98%E8%AE%A4%E5%8C%85%E5%90%AB%E7%9A%84%E6%98%AFPython%203.8%E7%89%88%E6%9C%AC%EF%BC%8C%E5%8F%AF%E4%BB%A5%E4%BD%BF%E7%94%A8,apt%20%E5%91%BD%E4%BB%A4%20%E8%BF%9B%E8%A1%8C%E5%AE%89%E8%A3%85%E6%88%96%E6%9B%B4%E6%96%B0%E3%80%82%20%E5%9C%A8%E6%92%B0%E5%86%99%E6%9C%AC%E6%96%87%E6%97%B6%EF%BC%8CPython%203.10%E6%98%AFPython%E8%AF%AD%E8%A8%80%E7%9A%84%E6%9C%80%E6%96%B0%E7%9A%84%E4%B8%BB%E7%89%88%E6%9C%AC%E3%80%82%20%E5%9B%A0%E6%AD%A4%E6%88%91%E4%BB%AC%E9%9C%80%E8%A6%81%E6%89%8B%E5%8A%A8%E7%BC%96%E8%AF%91python%203.10%E3%80%82看到这里：

再按照这个操作：

如何将ubuntu20.04的python3.8升级python3.10_ubuntu python3.8升级3.10-CSDN博客https://blog.csdn.net/m0_46669450/article/details/140791499最后就会成功。