下载Python3的包
wget https://www.python.org/ftp/python/3.5.0/Python-3.5.0.tgz
然后解压，安装，编译一系列操作
tar xf Python-3.5.0.tgz
cd Python-3.5.0
./configure
make
make install
centos7安装Python3
原文：https://www.cnblogs.com/baystj/p/15076425.html
