'openpyxl.worksheet.cell_range.MultiCellRange'
Created originally on Bitbucket by taeke79 (Tamás Nagy)
Error during conditional formatting.
the row, which provided the error: ws1.conditional_formatting.add('C21:C22',CellIsRule(operator='greaterThan', formula=[500],topIfTrue=True, fill=redFill)
where ws1 is the worksheet, C21:C22 is the range in which I'd like to use the conditional formatting. version: 2.6.2