1、下载python
# wget https://www.python.org/ftp/python/2.7.9/Python-2.7.9.tgz
2、解压、编译安装
# tar -zxvf Python-2.7.9.tgz
# cd Python-2.7.9
# ./configure --prefix=/usr/local/python-2.7.9
# make
# make install
3、系统自带了python版本，我们需要为新安装的版本添加一个软链
# ln -s /usr/local/python-2.7.9/bin/python /usr/bin/python27
4、使用
python27 helloworld.py