第一步，安装开发工具集
yum -y groupinstall "Development tools"
第二步，安装相关依赖包：
yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel
第三步，下载Python源码包，解压：
wget https://www.python.org/ftp/python/3.6.2/Python-3.6.2.tar.xz
tar -xvJf Python-3.6.2.tar.xz
第五步，编译：
cd Python-3.6.2 && ./configure --enable-optimizations # 进行配置优化
make && make install
第七步，创建软连接：
ln -s /usr/local/bin/python3 /usr/bin/python3
ln -s /usr/local/bin/pip3 /usr/bin/pip3