title: Python modules for version 2.6 / 2.7
body: <p>I need to use two python versions on my Ubuntu system: 2.6.5 and 2.7.2 (for compatibility with some third-party projects).</p>
  
  <p>For both of them, I need the PyGTK package.</p>
  
  <p>I installed the latest version of this package, but strangely, only the 2.6 version identifies it; the 2.7 version cannot find it:</p>
  
  <pre><code>erelsgl@ubuntu:/usr/lib$ python2.6 
  Python 2.6.5 (r265:79063, Apr 16 2010, 13:57:41) 
  [GCC 4.4.3] on linux2
  Type "help", "copyright", "credits" or "license" for more information.
  &gt;&gt;&gt; import pygtk
  &gt;&gt;&gt; print pygtk._get_available_versions()
  {'2.0': '/usr/lib/gtk-2.0'}
  &gt;&gt;&gt; quit()
  
  erelsgl@ubuntu:/usr/lib$ python
  Python 2.7.2 (default, Aug 16 2011, 09:51:01) 
  [GCC 4.4.3] on linux2
  Type "help", "copyright", "credits" or "license" for more information.
  &gt;&gt;&gt; import pygtk
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  ImportError: No module named pygtk
  &gt;&gt;&gt; 
  </code></pre>