1、Python依赖readline-devel,先yum -y install readline-devel
2、下载：python-2.7.6.tar.gz 和 ipython-1.2.1.tar.gz
https://www.python.org/downloads/release/python-2711/
https://pypi.python.org/pypi/ipython/4.2.0
3、安装python(不建议更改系统自带的，安装到其他位置再做软链接即可)
tar xvzf python-2.7.6.tar.gz
./configure --help #可查看安装选项
./configure --prefix=/usr/local/python27
make && make install
4、安装ipython
tar xvzf ipython-1.2.1.tar.gz
调用python来安装
/usr/local/python27/bin/python2.7 setup.py build #编译
/usr/local/python27/bin/python2.7 setup.py install #安装，它会安装到/usr/local/python27/bin/
做软连接到
ln -sv /usr/local/python27/bin/python2.7 /usr/bin/python27
ln -sv /usr/local/python27/bin/ipython /usr/bin/ipython
至此安装完毕，python27即可使用，原有旧版本输入python仍可以使用。
