CentOS7系统安装Python3
1.查看一下python2在哪个目录
whereis python
cd /usr/bin
ll python*
2.安装python3所需要的依赖包
yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make libffi-devel
3.安装pip
yum -y install epel-release
yum install python-pip
4.下载python3源码包
wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz
###5.解压缩
tar -zxvf Python-3.7.0.tgz
6.切换至解压后的目录,编译安装源码包
./configure prefix=/usr/local/python3
make && make install
7.添加python3的软链接及pip3 的软链接
ln -s /usr/local/python3/bin/python3.7 /usr/bin/python3.7
ln -s /usr/local/python3/bin/pip3.7 /usr/bin/pip3.7
###8.测试是否安装成功了
python -V
9.更改yum配置,因为其要用到python2才能执行,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