decorator rewrite the login procedure

# _ * _ Coding: UTF-8 _ * _ 
# Author: Wang Dian-yuan 
# Date: 2019/12/26 
Import Time 
Pages and the = [ 'Home Page', 'Finance Page', 'Book Page'] 
is_login = False 


DEF Decorator (jingdong_pay) : 
    DEF warpper (* args, ** kwargs): 
        Global is_login 
        IF is_login: 
            jingdong_pay (* args, ** kwargs) 
        the else: 
            is_login = Login () 
    return warpper 


DEF Login (): 
    USER_INFO, user_num = get_user_info () 
    username = INPUT ( "Please enter your name: ') 
    password = iNPUT (' enter password: ') 
    IF username and password in USER_INFO == USER_INFO [username]: 
        Print (' {} Welcome! '.format(pages[user_num]))
        return True
    the else: 
        return False 


DEF get_user_info (): 
    for Pages Page in: 
        Print ( "% D: '% (pages.index (Page) +. 1), Page) 
    user_num = int (INPUT (' enter the login page number: ') ) 
    IF == user_num. 1: 
        with Open ( 'Jingdong', 'R & lt', encoding = 'UTF-. 8') AS Jingdong: 
            USER_INFO = the eval (jingdong.read () Strip ()). 
    IF user_num == 2: 
        with Open ( 'Weixin', 'R & lt', encoding = 'UTF-. 8') AS Weixin: 
            USER_INFO = the eval (weixin.read () Strip ().) 
    return USER_INFO, user_num 


@decorator 
DEF jingdong_pay (Money): 
    Print ( ' payment in ...... ') 
    the time.sleep (2) 
    Print (' successful payment, you pay dollars {} '.format (Money)) 


jingdong_pay (1800)
jingdong_pay (2000)