title: Clean up the Python installation
body: <p>It seems that python can be found in three different places in my Mac OS. See below.  Is there anything wrong? Should I  and how can I clean up my python installation  without reinstalling the OS? In fact, I recently experience some strange behavior when using Python.</p>
  
  <pre><code>'/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/,
  
   '/usr/local/lib/python2.7/site-packages',
  
   '/Library/Python/2.7/site-packages',
  </code></pre>