[root@localhost ~]# cat /etc/redhat-release

CentOS release 6.4 (Final)

[root@localhost ~]# uname -r

2.6.-.el6.x86_64

[root@localhost ~]# rpm -qa|grep python

python-2.6.-.el6.x86_64

libxml2-python-2.7.-.el6_3..x86_64

python-urlgrabber-3.9.-.el6.noarch

python-iwlib-0.1-1.2.el6.x86_64

python-libs-2.6.-.el6.x86_64

rpm-python-4.8.-.el6.x86_64

dbus-python-0.83.-6.1.el6.x86_64

python-iniparse-0.3.-2.1.el6.noarch

python-pycurl-7.19.-.el6.x86_64

libproxy-python-0.3.-.el6_3.x86_64

libreport-python-2.0.-.el6.centos.x86_64

newt-python-0.52.-.el6.x86_64

python-ethtool-0.6-.el6.x86_64

abrt-addon-python-2.0.-.el6.centos.x86_64

[root@localhost ~]# python -V

Python 2.6.

[root@localhost ~]# cd /usr/local/src

[root@localhost ~]# wget https://www.python.org/ftp/python/2.7.5/Python-2.7.5.tgz

[root@localhost ~]# tar xvf Python-2.7..tgz

[root@localhost ~]# cd Python-2.7.

[root@localhost ~]# ./configure

[root@localhost ~]# make all

[root@localhost ~]# make install

[root@localhost ~]# make clean

[root@localhost ~]# make distclean

[root@localhost ~]# rm /usr/bin/python

[root@localhost ~]# ln -s /usr/local/bin/python2. /usr/bin/python

[root@localhost ~]# python -V

Python 2.7.