title: Python package installation
body: <p>I am trying to install <code>nibabel</code> through <code>pip</code>:</p>
  
  <pre><code>pip install nibabel
  </code></pre>
  
  <p>It installs successfully, however, when I write the following code:</p>
  
  <pre><code>import nibabel as nib 
  </code></pre>
  
  <p>I get this error :</p>
  
  <blockquote>
  <pre><code>ImportError: No module named 'nibabel'
  </code></pre>
  </blockquote>
  
  <p>And when I check in the terminal using:</p>
  
  <pre><code>pip show nibabel
  </code></pre>
  
  <p>It shows that it exists</p>
  
  <pre><code>Author-email: neuroimaging@python.org
  
  License: MIT license
  
  Location: /usr/local/lib/python3.6/site-packages
  
  Requires: numpy, six
  </code></pre>
  
  <p>This issue happens in both Python 3.x and 2.x.</p>