title: pip install bitarray
body: <p>Running <code>pip install bitarray</code> results in a fatal error for me:</p>
  
  <pre><code>bitarray/_bitarray.c:9:20: fatal error: Python.h: No such file or directory
  </code></pre>
  
  <p>I'm running an <strong>Ubuntu 12.04 upgrade</strong>. Perhaps I missed installing some dependencies?</p>
  
  <p>Running Python works:</p>
  
  <pre><code>Python 2.7.3 (default, Aug  1 2012, 05:16:07) 
  [GCC 4.6.3] on linux2
  </code></pre>