Centos7 安装 python3

系统版本

[root@localhost Python-3.7.1]# cat /etc/redhat-release

CentOS Linux release 7.5.1804 (Core)

安装环境依赖

yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make libffi-devel -y

解压安装文件

tar -xvf Python-3.7.1.tar.xz

cd Python-3.7.1

./configure prefix=/usr/local/python3

make && make install

配置环境变量

echo “export PATH=$PATH:/usr/local/python3/bin/" >> /etc/profile

source /etc/profile

#将原来的链接备份

[root@localhost ~]# mv /usr/bin/python /usr/bin/python.bak

#添加python3的软链接

[root@localhost ~]# ln -s /usr/local/python3/bin/python3 /usr/bin/python

测试是否安装成功了

[root@localhost ~]# python -V

Python 3.7.1

更改yum配置，否则会导致yum不能正常使用

vi /usr/bin/yum

把#! /usr/bin/python修改为#! /usr/bin/python2

vi /usr/libexec/urlgrabber-ext-down

把#! /usr/bin/python 修改为#! /usr/bin/python2