title: Use python 2.7 for some apps, while keeping python 2.6 for the OS (linux fedora/centos)
body: <p>How can I use python 2.7 for some apps, while keeping python 2.6 for the OS?</p>
  
  <p>I am using CentOS6.6 (based on RHEL 6 / Fedora 12), and would like to install some recent packages such as meld 3.13, latest rabbitcvs, etc...
  It requires python 2.6 to run.</p>
  
  <p>when I try to run meld 3.13, it says "Meld requires Python 2.7 or higher."</p>
  
  <p>I have successively installed python 2.7 following this tutorial
  <a href="http://toomuchdata.com/2014/02/16/how-to-install-python-on-centos/" rel="nofollow">http://toomuchdata.com/2014/02/16/how-to-install-python-on-centos/</a></p>
  
  <p>how can I tell meld to use python2.7 ?</p>