def checkCorePoint(self):
    
    wb = load_workbook(self.targetCoreFile)
    sheets = wb.sheetnames
    # 定義一個存放的sheet
    targetSheet = 'TargetCorePoint'
    # 判斷是否已經存在這個sheet頁，如果不存在新建一個
    if targetSheet not in sheets:
        cs = wb.create_sheet(targetSheet)
    else:
        # 如果已經存在了，那麼刪除舊的，防止資料堆積，重新建立新的sheet頁
 

        cs = wb[targetSheet]
        wb.remove(cs)
        cs = wb.create_sheet(targetSheet)
    sheet = sheets[0]
    ws = wb[sheet]
    targetPointList = []
    # 遍歷讀取所有行
    for row in ws.rows:
        line = [col.value for col in row]
        # 講所讀資訊存在list
        targetPointList.append(line)
    targetCorePointList 
 
= [['business_ch_name', 'category_id', 'target_id', 'event_type', '是否核心埋點']]
    # 遍歷埋點list,判斷是否在已知當中
    for i in targetPointList:
        # 如果存在當前資訊增加標識
        if i[2] in self.sourceCorePointList:
            i.append('是')
            # 並把該埋點存放到list
            targetCorePointList.append(i)


    
 
# 遍歷list，並將存放到 TargetCorePoint sheet 頁
    for row in targetCorePointList:
        cs.append(row)

    wb.save(filename=self.targetCoreFile)
    print("執行完成！")

參考 ：Python - openpyxl 讀寫操作Excel