linux升级python3 2020-04-02

先安装apt install libffi-dev

然后按照 https://www.cnblogs.com/weiyiyong/p/9384692.html 的做法，先下载安装包再安装，注意要修改Setup.dist(211行开始)

https://blog.csdn.net/qianglei6077/article/details/86698847