import os
import openpyxl
from openpyxl.styles import Border, Side, PatternFill, Font, GradientFill, Alignment
def range_sum(worksheet,start,end):
  sum = 0
  for row in worksheet[start:end]:
    for cell in row:
      if cell.value != None:
        sum += cell.value
  return sum
def is_blank_row(worksheet,row_num,max_col=None):
  if not max_col:
    max_col = worksheet.max_column 
  for cell in worksheet[row_num][:max_col]:
    if cell.value:
      return False
  return True
def total_amount(worksheet):
  """ 對某sheet的A、E列合并居中，并對E列求和 """
  ws = worksheet
  row, max_row = 4, ws.max_row
  while row < ws.max_row:
    sum_row_start, sum_row_end = row, row
    for working_row in range(row + 1,max_row + 2):
      if (not is_blank_row(worksheet, working_row-1) # 上一行有值
         and (ws[f'A{working_row}'].value or is_blank_row(worksheet, working_row))): # A列有值 或 當前為空行（最后一次合并）
          # 求和
          sum_row_end = working_row - 1
          ws[f'E{sum_row_start}'] = range_sum(ws,f'C{sum_row_start}',f'C{sum_row_end}')
          # 合并居中
          ws[f'E{sum_row_start}'].alignment = Alignment(horizontal="center", vertical="center")
          ws[f'A{sum_row_start}'].alignment = Alignment(horizontal="center", vertical="center")
          ws.merge_cells(f'E{sum_row_start}:E{sum_row_end}')
          ws.merge_cells(f'A{sum_row_start}:A{sum_row_end}')
          break
    row = sum_row_end + 1
def main():
  # 根據情況修改代碼
  in_file_name = 'In.xlsx'
  processing_sheet = 'Sheet1'
  path_name = 'D:\\Users\\Desktop\\Temp'
  out_file_name = 'Out.xlsx'
  wb = openpyxl.load_workbook(filename=os.path.join(path_name,in_file_name))
  total_amount(wb[processing_sheet])
  wb.save(os.path.join(path_name,out_file_name))
if __name__=='__main__':
  main()

dataf_test1['diff'].sum() // diff為要求和的列