title: How to find the last row in a column using openpyxl normal workbook?
body: <p>I'm using openpyxl to put data validation to all rows that have "Default" in them. But to do that, I need to know how many rows there are.</p>
  
  <p>I know there is a way to do that if I were using Iterable workbook mode, but I also add a new sheet to the workbook and in the iterable mode that is not possible.</p>