title: how to access cell values faster with openpyxl?
body: <pre><code>for rownum in range(0, len(self.sheet.rows) ):
     for cell in self.sheet.rows[rownum]:
        print cell.value
  </code></pre>
  
  <p>I want to access all cell values in a sheet row by row with openpyxl. Above code works but too slow. How can I access all cell values faster?</p>