Linux Centos Python2.7升级至Python3.8

一、查看信息

python -V         #查看当前版本
which python      #查看python命令的引用目录

二、安装升级、编译环境

yum install -y zlib-devel bzip2 bizp2-devel readline-devel sqlite sqlite-devel openssl-devel xz xz-devel libffi-devel gcc
#gcc 环境必须安装，不然make(编译)和make install（安装）python3.8会报错

三、下载python3.8，并进行安装编译

#切换到/usr/local/目录
cd /usr/local/
#下载python3.8
wget http://npm.taobao.org/mirrors/python/3.8.0/Python-3.8.0.tgz;
#解压下载文件
tar -cvf Python-3.8.0.tgz
#创建安装路径
mkdir /usr/local/python3
#进入解压文件下
cd /usr/local/Python-3.8.0
#生产makefile文件 
./configure --perfix=/usr/local/python3
#编译
make
#安装
make install
#验证
/usr/local/python3/bin/python3 -V

四、创建软连接

#创建python3的软连接
ln -s /usr/local/python3/bin/python3 /usr/bin/python3
#创建pip3的软连接
ln -s /usr/local/python3/bin/pip