import openpyxl, sys
sys.stdout.reconfigure(encoding='utf-8')
p = r'D:\01.프로젝트\DB수집\작업파일\광역_사이트맵\충청남도\9.서천군\충청남도_서천군.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 range(1, 3):
    for c in range(1, ws.max_column+1):
        v = ws.cell(r, c).value
        if v is not None:
            print(f'  R{r} {openpyxl.utils.get_column_letter(c)}: {v}')
print('=== merged ranges ===')
for m in sorted(ws.merged_cells.ranges, key=lambda x:(x.min_row,x.min_col)):
    print('  ', str(m))