安装python3.8

1，官网下载python3.8版本：https://www.python.org/downloads/

2，解压缩 $ tar -xf Python-3.8.10.tar.xz

3，$ sudo apt update

 $ sudo apt install build-essential zlib1g-dev libncurses5-dev libgdbm-dev libnss3-dev libssl-dev libreadline-dev libffi-dev

4，编译安装

$ cd Python-3.8.10

$ ./configure --enable-optimizations

$ make

$ sudo make altinstall