CentOS安装Python3k步骤:
1. 安装GCC及依赖库：yum -y install gcc zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel
2. 从官方网站下载Python源代码：wget https://www.python.org/ftp/python/3.6.5/Python-3.6.5.tar.xz
3. 解压缩：xz -d Python-3.6.5.tar.xz
4. 解归档：tar -xvf Python-3.6.5.tar
5. 配置安装信息(生成构建文件Makefile)：
cd Python-3.6.5
./configure –prefix=/usr/local/python36/ –enable-optimizations
6. 执行构建和安装：make && make install
7. 配置PATH环境变量：
cd ~
vim .bash_profile
PATH=$PATH:/usr/local/python36/bin
source .bash_profile
echo $PATH
8. 创建符号链接：
ln -s /usr/local/python36/bin/python3 /usr/bin/python3