Well , today I was trying to install DataStax OpsCenter on a Centos 5.4 ( 5.x ) . After download and configured when to start I see a error. Well this was because on that version the python on that server is 2.4  more exaclty python-2.4.3-44.el5_7.1 .
How to upgrade centos 5.x with python 2.6 ? Well the solution is to yum install python26.
Will install another package and the DataStax OpsCenter will start working.