有没有大佬帮忙看一下，之前写的用openpyxl造数据的代码，现在不能运行了；代码如下：'''导入方法包'''from openpyxl import load_workbookfrom openpyxl import Workbookimport randomimport string'''打开文件'''aa.save('test.xlsx')wb = load_workbook('test.xlsx')print(wb.sheetnames)'''打开Sheet表格'''sheet5 = wb['Sheet5']max = sheet5.max_rowsheet5['A1'] = 'USERNAME'sheet5['B1'] = 'PASWORD'for i in range(2, 5): num = random.randint(1, 10000) s = str(num) str_001 = sheet5.cell(row=i, column=1).value=("User_" + s)for i in range(2, 5): num = random.randint(100000, 1000000) s = str(num) str_001 = sheet5.cell(row=i, column=2).value=("pwd." + s)wb.save('test.xlsx')报错如下：D:\MyData\ex_chencw2\AppData\Local\Programs\Python\Python39\python.exe D:/MyData/ex_chencw2/Desktop/python/接口自动化/openpyxl_造数据.pyTraceback (most recent call last): File "D:\MyData\ex_chencw2\Desktop\python\接口自动化\openpyxl_造数据.py", line 8, in <module> aa.save('test.xlsx')NameError: name 'aa' is not defined#openpyxl问题