Python 3.x Openpyxl更新文件的数据，而不是创建新的

我正在建立一个小工具来检查网站上的超链接是否会消失或保留。 到目前为止，该程序仍能正常工作，但始终会创建一个新文件并删除一天前创建的最新工作表，我每天都会更新脚本

我的代码如下

    def save_results(excel_urls,erg):
        currentdate = str(date.today())
        excel_file = openpyxl.load_workbook('Links2.xlsx')
        excel_sheet = excel_file['Sheet']
        book = Workbook()
        sheet = book.active
        #this following code is from my main sheet to keep it in the following file as well. its also not a proper update function but works so far. 
        sheet.column_dimensions['A'].width = 60
        sheet.column_dimensions['B'].width = 60
        for row in excel_sheet.values:
            sheet.append(row)
        #Here im going to create the other sheets with the results of my crawl
        book.create_sheet(currentdate)
        book[currentdate].column_dimensions['A'].width = 60
        book[currentdate].column_dimensions['B'].width = 60
        for keys,values in enumerate(excel_urls):
            y = values[0], str(erg[keys])
            book[currentdate].append(y)
        book.save('Links2.xlsx')

我找不到只更新而不覆盖现有文件的方法。一个在结果安全之前包含所有内容的函数也可以工作

提前谢谢你的帮助

我的函数实际上不起作用

    excel_file = openpyxl.load_workbook('Links2.xlsx')
    book = Workbook()
    for z,i in enumerate(excel_file.sheetnames):
        book.create_sheet('{}'.format(i))
        print(excel_file.sheetnames[z])
        for row in excel_file[excel_file.sheetnames[i]].values:
            #print(row)
            excel_file[excel_file.sheetnames[i]].append(row)
    book.save('Links2.xlsx')```

---

更新和覆盖之间没有区别。谢谢，我期待着。因此，我尝试编写一个函数，将所有现有数据附加到文件中，但它不起作用。我要在我的帖子里添加代码。

def save_exisiting_data():      
    excel_file = openpyxl.load_workbook('Links2.xlsx')
    book = Workbook(write_only=True)
    for z, i in enumerate(excel_file.sheetnames):
        book.create_sheet('{}'.format(i))
        book[i].column_dimensions['A'].width = 60
        book[i].column_dimensions['B'].width = 60
        for row in excel_file[excel_file.sheetnames[z]].values:
            book[excel_file.sheetnames[z]].append(row)