title: ImportError: No module named nibabel in python 2.7
body: <p>I am using python 2.7 and I used </p>
  
  <pre><code>pip install nibabel
  </code></pre>
  
  <p>but I constantly get the error</p>
  
  <pre><code>ImportError: No module named nibabel.
  </code></pre>
  
  <p>when I type</p>
  
  <pre><code>pip show nibabel 
  </code></pre>
  
  <p>I get this result so it seems that it is installed but still get the aforementioned error when using import nibabel as nib</p>
  
  <pre><code>    Name: nibabel
  Version: 2.5.0
  Summary: Access a multitude of neuroimaging data formats
  Home-page: https://nipy.org/nibabel
  Author: nibabel developers
  Author-email: neuroimaging@python.org
  License: MIT License
  Location: /usr/local/lib/python3.5/dist-packages
  Requires: six, numpy
  Required-by: 
  </code></pre>
  
  <p>Here the address shows it is installed in python3 path! How can I address this problem?</p>