Now my system is like this:
$ ls -la /usr/bin/python
lrwxrwxrwx. 1 root root 7 Oct 1 2012 /usr/bin/python -> python2
$ ls -la /usr/bin/python2
lrwxrwxrwx. 1 root root 9 Oct 1 2012 /usr/bin/python2 -> python2.7
$ ls -la /usr/bin/python2.7
-rwxr-xr-x. 1 root root 10768 Jul 24 2012 /usr/bin/python2.7
You want to do this I think:
sudo rm /usr/bin/python
sudo ln -s /usr/bin/python2.7 /usr/bin/python
So that /usr/bin/python -> /usr/bin/python2.7
But I can not use yum and update my system as Klaus Warzecha pointed out.