import sys, io
sys.stdout = io.TextIOWrapper(sys.stdout.buffer, encoding='utf-8')
import openpyxl
P = r'D:\01.프로젝트\DB수집\작업파일\광역_사이트맵\충청남도\10.아산시\충청남도_아산시.xlsx'
wb = openpyxl.load_workbook(P)
ws = wb.active
print('dims', ws.dimensions, 'max_row', ws.max_row, 'max_col', ws.max_column)
print('--- header rows 1-2 ---')
for r in (1, 2):
    for c in ws[r]:
        if c.value is not None:
            print(r, c.coordinate, repr(c.value))
print('--- merged (first 30) ---')
for i, m in enumerate(sorted(ws.merged_cells.ranges, key=lambda x: (x.min_row, x.min_col))):
    if i < 30:
        print(m)