Loop-help for a newbie?

[buran]

for row in (1, 4):
    sheet.merge_cells(start_row=row, start_column=1, end_row=row, end_column=9) # Note:

for row in (2, 3, 5):
    for scol, ecol in zip(range(2, 9, 2), range(3, 10, 2)):
        sheet.merge_cells(start_row=row, start_column=scol, end_row=row, end_column=ecol)

note that f-string is just a way to create the string. It should not interfere with openpyxl. Here is the example from post#7 with str.format method

for row in range(10, 13):
    for col1, col2 in zip('BDFH', 'CEGI'):
        print('{0}{2}:{1}{2}'.format(col1, col2, i))

if you have issue, show us what the problem is, pretty sure it's not the f-string. If openpyxl accept string as input to sheet.merge it does not matter how you construct the string or even if you just pass a variable.