[Centos] install python2.75 and set it to the default version.

1 centos install python2.75 (centos6.3)

1 switch to root user 2 download tar package

           wget http://www.python.org/ftp/python/2.7.5/Python-2.7.5.tgz

3 installation

          tar -zxvf Python-2.7.5.tgz          cd Python-2.7.5          ./configure --prefix=/usr/local/python27          make&&make install

4. Have you installed the SDK?

          /usr/local/python27/bin/python 

The Python version is 2.7.5.
Set software links

 ln -s /usr/local/python27/bin/python /usr/bin/python27

Later, you can directly use python27 to use version 2.7.5. 2 is set to the default version.

     mv /usr/bin/python /usr/bin/python-old     ln -s /usr/local/python27/bin/python /usr/bin/python

Test again:

     [root@bogon Python-2.7.5]# python       Python 2.7.5 (default, Jul 22 2013, 22:14:28)      [GCC 4.4.7 20120313 (Red Hat 4.4.7-3)] on linux2      Type "help", "copyright", "credits" or "license" for more information.

In this way, when yum is used, an error is reported.

  vim /usr/bin/yum

Modify the first line :#! /Usr/bin/Python-old input Yum again and it will be displayed normally.