python2和3.6.5兼容安装

1、准备编译环境(环境如果不对的话，可能遇到各种问题，比如wget无法下载https链接的文件)

yum install gcc-c++ python-devel.x86_64 cyrus-sasl-devel.x86_64

yum groupinstall 'Development Tools'

yum -y install libffi-devel

yum install zlib-devel bzip2-devel openssl-devel ncurses-devel

2、下载 Python3.6.5代码包

wget https://www.python.org/ftp/python/3.6.5/Python-3.6.5.tar.xz

3、编译

tar Jxvf Python-3.6.5.tar.xz

cd Python-3.6.5

./configure --prefix=/usr/local/python3

make && make install

4、设置环境变量

echo 'export PATH=$PATH:/usr/local/python3/bin' >> ~/.bashrc

5、设置目录

ln -sv /usr/local/python3/bin/python3.6 /usr/bin/python3

这样做的目的是在系统任意目录敲入python3调用的是python3.6的命令

部分转自从http://www.jb51.net/article/115370.htm