需求：

模擬驗證用戶輸入密碼登錄。要求有3次機會，如果用戶只輸錯密碼，則三次後鎖定，下次再登陸則提示賬號鎖定。

如果用戶名密碼正確，則提示登陸成功。

做作業：

使用兩個文本文件來分別存放用戶信息和鎖定信息

用戶和密碼列表

[[email protected] day1]# cat user_list.txt
liuxiaolu 123456
liuxiaogou 888888
liuxiaomao 654321

黑名單列表

[[email protected] day1]# cat user_lock.txt

程序代碼

#!/usr/bin/env python3
 

# -*- coding:utf-8 -*-
# Author: leilei

# 定義變量
tries = 0 #嘗試次數
tries_user = 0 #
account_flag = 0

while tries < 3:
    user_list = open(‘/dbdata/pythons/s14/day1/user_list.txt‘,‘r‘)
    user_lock = open(‘/dbdata/pythons/s14/day1/user_lock.txt‘, ‘r‘)
    user_name = input("plz enter ur name:")
    user_pass 
 
= input("plz enter ur pass:")
    
    for _user_lock in user_lock.readlines():
        _user_block = _user_lock.strip().split()
        if user_name == _user_block[0]:
            print("this account has been locked!")
            account_flag = 1
            tries = 4
            break
    
    if account_flag == 0:
        
 
for _user_name in user_list.readlines():
            _user = _user_name.strip().split()
            if user_name == _user[0] and user_pass == _user[1]:
                print("welcome to login...,",user_name)
                tries = 4
                break
            elif user_name == _user[0] and user_pass != _user[1]:
                print("wrong username or password!")
                tries_user = tries_user + 1
                break
        else:
            print("wrong username or password!")
        tries = tries + 1
        if tries < 4:
            print("u have",3-tries,"chances left!\n")
        if tries_user == 3:
            user_lock = open(‘/dbdata/pythons/s14/day1/user_lock.txt‘, ‘a‘)
            user_lock.write(user_name+"\n")
            user_lock.close()
            print("lots of atempts, ur account has been locked.")

user_list.close()
user_lock.close()

測試

[[email protected] day1]# ./zuoye2.py   --測試賬號鎖定
plz enter ur name:liuxiaomao
plz enter ur pass:1
wrong username or password!
u have 2 chances left!

plz enter ur name:liuxiaomao
plz enter ur pass:2
wrong username or password!
u have 1 chances left!

plz enter ur name:liuxiaomao
plz enter ur pass:3
wrong username or password!
u have 0 chances left!

lots of atempts, ur account has been locked.  －－提示被鎖定
[[email protected] day1]# cat user_lock.txt 
liuxiaomao
[[email protected] day1]# ./zuoye2.py  --被鎖定無法登陸
plz enter ur name:liuxiaomao
plz enter ur pass:11
this account has been locked!
[[email protected] day1]# ./zuoye2.py  --測試成功登陸
plz enter ur name:liuxiaolu
plz enter ur pass:123456
welcome to login..., liuxiaolu
[[email protected] day1]# ./zuoye2.py  －－測試密碼錯誤
plz enter ur name:liuxiao
plz enter ur pass:1
wrong username or password!
u have 2 chances left!

plz enter ur name:liuxiao
plz enter ur pass:2
wrong username or password!
u have 1 chances left!

plz enter ur name:liuxiao
plz enter ur pass:3
wrong username or password!
u have 0 chances left!

s14 python3 day1 作業2