Using version 2.4.1, calling ws.iter_rows gives the following DeprecationWarning:
"Call to deprecated function or class get_squared_range (
Use ws.iter_rows() or ws.iter_cols() depending whether you
want rows or columns returned.
Clearly this warning doesn't make much sense as I am calling ws.iter_rows, which is what calls get_squared_range (on line 510 of worksheet.py).