excelの結合セルで縦結合のみ表示

from openpyxl import load_workbook

wb = load_workbook(filename='XXXXXX.xlsx')

for sheet in wb.sheetnames:

    print('-' * 20)
    print(sheet)

    ws = wb[sheet]

    for i in ws.merged_cells.ranges:
        if i.min_row != i.max_row:
            print(i)