title: python pandas to excel error
body: <p>I have a dataframe that I want to export to Excel. I'm new to python and pandas so I need some help on this simple task.</p>
  
  <pre><code>df2.to_excel('C:\BT\stack_test3.xlsx')
  </code></pre>
  
  <p>Error message:</p>
  
  <p>IOError: [Errno 13] Permission denied: 'C:\BT\stack_test3.xlsx'</p>