一、查看当前Python版本
python -V
二、下载新的python包并安装
1、更新yum源
yum update
2、安装依赖项
yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel libffi-devel gcc make
3、下载python源码并编译安装
wget https://www.python.org/ftp/python/3.8.2/Python-3.8.2.tgz tar xvf Python-3.8.2.tgz cd Python-3.8.2 ./configure --prefix=/usr/local/python3 make && make install
4、添加软连接
mv /usr/bin/python /usr/bin/python.bak ln -s /usr/local/python3/bin/python3 /usr/bin/python
这样系统的默认python版本都升级到python3咯