title: No module named 'igraph._igraph'
body: <p>I just installed python-igraph 0.7.1 from source with no problems. I didn't already have the C library installed because using the repository version caused errors while building, but setup.py successfully compiled it.</p>
  
  <p>However, now I can't import it. I get the following error:</p>
  
  <pre><code>&gt;&gt;&gt; import igraph
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
    File "/home/jeffcollins/Downloads/python-igraph-0.7.1/igraph/__init__.py", line 34, in &lt;module&gt;
      from igraph._igraph import *
  ImportError: No module named 'igraph._igraph'
  </code></pre>
  
  <p>Prior to my upgrade from trusty to vivid I didn't have this problem, but my install on trusty was long enough ago that I don't remember if anything else relevant has changed (not the Python or python-igraph versions, though).</p>
  
  <p>My system info, if relevant:</p>
  
  <ul>
  <li>Samsung Chromebook 2 </li>
  <li>ARMv7 Processor rev 3 (v7l) x4 </li>
  <li>Ubuntu 15.04 (via crouton) </li>
  <li>Python 3.4.3</li>
  </ul>