linux下升级python

1. 到python官网下载安装包

https://www.python.org/downloads/

Python-2.7.8.tar.xz

2.  解压安装包

$xz -dPython-2.7.8.tar.xz

$tar -xvf Python-2.7.8.tar.xz

3. 安装

cd   Python-2.7.8

.configure

make&make install

python 的安装目录在/usr/local/lib/python2.7

4.更改默认指向

mv /usr/bin/python /usr/bin/python.bak

ln -s /usr/local/bin/python2.7 /usr/bin/python