linux更新python
linux下原来安装的python是2.4,现在需升级至2.7.1.首先下载2.7的压缩包：
wget http://www.python.org/ftp/python/2.7.1/Python-2.7.1.tgz
2.解压安装：
$ tar-xvf Python-2.7.1.tar
$ mv Python-2.7.1/usr/local/
$ cd Python-2.7.1
$ ./configure
$ make
$ make install
3.更改软链接：
ln -s/usr/local/Python-2.7.1/python ./python
4.测试：
输入python，显示如下：
Python 2.7.1 (r271:86832, Feb 24 2011, 09:20:11)
on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>
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