title: permission denied issue when trying to access files in a folder with xlrd or shutil
body: <p><strong>Edit: I deleted this but I'm going to undelete because I think it could be useful. And post what was actually happening which I didn't realize at the time.</strong></p>
  
  <p>Original Question: I'm trying to open a set of excel files where one is currently open by another user. All of the other files work, but this one I get 'permission denied' errors. </p>
  
  <p>Windows gives you the option to "read only" open the file, but I can't seem to find an equivalent in python (xlrd), so I thought I would copy the file to a temp location and open it; but that doesn't work either. In either case, i get:</p>
  
  <pre><code>IOError: [Errno 13] Permission denied:
  </code></pre>
  
  <p>Is it possible to either:</p>
  
  <ul>
  <li>open an excel file in read only mode (like windows) in xlrd</li>
  <li>copy a file currently in use by another user</li>
  </ul>
  
  <p>thanks !</p>