关于修饰器的运用，用户名认证

代码;

#!/usr/bin/env python
#-*- coding:utf-8 -*-
def deco(func):
    def right(username,password):
        import os
        import sys
        dir_path = os.path.dirname(os.path.dirname(os.path.adspath(__file__)))
        sys.path.append(dir_path)
        from db import accounts
        for i in os.walk(accounts):
            for d in i[2]:
                if username in i[2][d]:
                    with open(i[2][d],'r',encoding='utf-8') as f:
                        for c in f:
                            if password in c:
                                print('认证通过！')
                                func()
                            else:
                                print('认证失败')
        return