安装Python依赖包：
[[email protected] src]# yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make下载Python源码包：
[[email protected] src]# wget ttp://mirrors.sohu.com/python/3.6.4/Python-3.6.4.tgz编译、安装：
[[email protected] /]# tar -xzvf /usr/local/src/Python-3.6.4.tgz -C /usr/local/src/
[[email protected] /]# cd /usr/local/src/Python-3.6.4
[[email protected] Python-3.6.4]# ./configure --prefix=/usr/local/python
[[email protected] Python-3.6.4]# make -j 4
[[email protected] Python-3.6.4]# make install查看扩展安装包：
[[email protected] /]# /usr/local/python/bin/pip3 list
pip (8.1.1) setuptools (20.10.1)添加Python命令到环境变量：
[[email protected] /]# vim ~/.bash_profile
PATH=$PATH:$HOME/bin
改为：
PATH=$PATH:$HOME/bin:/usr/local/python/bin使环境变量生效：
[[email protected] /]# source ~/.bash_profile查看Python版本：
[[email protected] /]# python3 -V
Python 3.6.4更改系统默认python版本为Python3.6
[[email protected] /]# mv /usr/bin/python /usr/bin/python2.6
[[email protected] /]# ln -s /usr/local/python/bin/python3.6 /usr/bin/python核对Python版本：
[[email protected] /]# python -V
Python 3.6.4解决python升级后，YUM不能正常工作的问题：
#vi /usr/bin/yum 将文件头部的 #!/usr/bin/python
改成 #!/usr/bin/python2.6