title: How to find PYTHONPATH on Redhat?
body: <p>On Redhat, python 2.4.3 is installed. On that machine, we have an application that uses python 2.6 (strange, at least for me).</p>
  
  <p>I understand it this way:
  I start a command line from RedHat desktop and type "python", it says:</p>
  
  <pre><code>Python 2.4.3 (#1, Dec 11 2006, 11:39:03)
  </code></pre>
  
  <p>Within the application I mentioned above, I can start an xterm, and when I type "python" there, it says:</p>
  
  <pre><code>Python 2.6.5 (r265:79063, Sep 27 2010, 19:19:43)
  </code></pre>
  
  <p>Now, PYTHONPATH of RedHat and PYTHONPATH of this application is different than each other.</p>
  
  <p>I want to add a new directory to the PYTHONPATH of this application. How can I find where its PYTHONPATH is defined? And how do I add a new directory to this application's PYTHONPATH?</p>