title: No module named html2text
body: <p>I have tried various ways to install the library html2text and all end with ipython not being able in import it with the error message </p>
  
  <blockquote>
    <p>"ImportError: No module named html2text"</p>
  </blockquote>
  
  <pre><code>The directory '/Users/NDunn/Library/Caches/pip/http' or its parent  directory is not
   owned by the current user and the cache has been disabled.
   Please check the permissions and owner of that directory.
   If executing pip with sudo, you may want sudo's -H flag.
  The directory '/Users/NDunn/Library/Caches/pip/http' or its parent directory is not owned
  by the current user and the cache has been disabled.
  Please check the permissions and owner of that directory.
  If executing pip with sudo, you may want sudo's -H flag.
  Collecting html2text
  Installing collected packages: html2text
  Successfully installed html2text-2015.6.21
  </code></pre>
  
  <p>I have used <code>sudo</code> and <code>-H</code> sudo both of which say it has installed but then I can not import.</p>
  
  <p>Any ideas on what is going on would be greatly appreciated. </p>