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) 
&nb