title: Can not import modules from gi.repository
body: <p>I can not import modules from gi.repository.
  Specifically not Gtk and GObject.</p>
  
  <p>I experienced this error both on Ubuntu 14.04 LTS and after reinstall
  also on Linux Mint 17.</p>
  
  <pre><code>from gi.repository import Gtk, GObject
  </code></pre>
  
  <p>Results in the 'unresolved reference' warning for the respective
  modules. Interestingly enough my Gtk GUI can be compiled and works
  perfectly fine. Yet, GObject is entirely out of function.</p>
  
  <p>I tried to work around with altering import statements such as:</p>
  
  <pre><code>from gi.repository.Gtk import*
  </code></pre>
  
  <p>Even hard coding the import path via:</p>
  
  <pre><code>sys.path.append('/usr/lib/python2.7/dist-packages/gi')
  </code></pre>
  
  <p><em>None of these approaches have solved this frustrating error so far.</em></p>
  
  <p>I have not found any concluding help or basic info on this issue,
  neither anywhere on the web nor in Linux forums or here on stackoverflow.
  I am not sure whether this problem lies on the Python or the Linux side of things.</p>
  
  <p><strong>Can anybody suggest how to solve this issue?</strong>
  What additional information do I need to provide eventually.</p>
  
  <p>Thanks!</p>