title: ImportError: No module named gtk
body: <p>I have a PC running Ubuntu 17.10. I want to runn a python script that uses gtk. HoweverI get the following error:</p>
  
  <pre><code>Traceback (most recent call last):
    File "/usr/local/bin/selectvm.py", line 3, in &lt;module&gt;
      import gtk
  ImportError: No module named gtk
  </code></pre>
  
  <p>I have tried already many things like:</p>
  
  <pre><code>sudo apt install python-gtk2 
  sudo apt install python-gtk2-dev
  </code></pre>
  
  <p>but none of them works. APT says they are already installed.</p>