title: Reading .xlsx format in python
body: <p>I've got to read .xlsx file every 10min in python.<br>
  What is the most efficient way to do this?<br>
  I've tried using xlrd, but it doesn't read .xlsx - according to documentation he does, but I can't do this - getting <code>Unsupported format, or corrupt file</code> exceptions.<br>
  What is the best way to read xlsx?<br>
  I need to read comments in cells too.</p>