下载python源码

wget https://www.python.org/ftp/python/3.7.3/Python-3.7.3.tgz

# 解压
tar -xzvf  Python-3.7.3.tgz

# 安装插件
yum install -y zlib-devel bzip2-devel libffi-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make

# 编译安装

./configure prefix=/usr/local/python3

make

make install

# 创建软链接

ln -s /usr/local/python3/bin/python3 /usr/bin/python3

ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3

使用方法

使用命令python3就是调用python3，使用python就是调用python2，pip3同理。