1 下载源码包 (https://www.python.org/downloads/release/python-352/)
2 解压Python-3.5.2.tar.xz
3 sudo ./configure --prefix=/usr/local/python3.5.2 (/usr/local/python3.5.2--配置路径)
4 make
5 make install
6 ln -s /usr/local/python3.5.2/bin/python3 (创建链接)
7 sudo rm python(删除原链接)
8 sudo ln -s /usr/local/python3.5.2/bin/python3 /usr/bin/python (建立新链接)
9 python 查看版本