python实现对Excel加密方法

import os, sys import win32com.client import time import hashlib import tkinter as tk    #调用GUI图形模块

from tkinter import filedialog

def pwd_xlsx(old_filename,new_filename,pwd_str,pw_str=''):     xcl = win32com.client.Dispatch("Excel.Application")     # pw_str为打开密码, 若无 访问密码, 则设为 ''     wb = xcl.Workbooks.Open(old_filename, False, False, None, pw_str)     xcl.DisplayAlerts = False       # 保存时可设置访问密码.     wb.SaveAs(new_filename, None, pwd_str, '')     time.sleep(0)     wb.Close()     xcl.Quit()

def read_path(path):     dirs = os.listdir(path)     return dirs

def get_file(data_dir):     f = open(data_dir,'r')     filelist = f.readlines()     f.close()     filename_l=[]     print(filelist)      #return 文件集     for filename in filelist:         i