用户登录

#!/usr/bin/env python
#-*- coding:utf-8 -*-
# @Time    : 2017/9/13 10:38
# @Author  : lichuan
# @File    : login.py


users = {
    'chuan' : ['123456',0],
    'tianshuai' : ['123456',0],
    'zhiqiang' : ['123456',0],
}

count=0
FLAG_TAG=True
while FLAG_TAG:

        username = input("输入你的用户名：").strip()
        passwd = input("输入你的密码：").strip()

        if username in users and users[username][1] < 3:
            if users[username][0] == passwd:
                print("you have login successful!")
                FLAG_TAG = False
            else:
                print("passwd is wrong!")
                users[username][1]+=1
        elif username in users and users[username][1] >= 3:
            print("user is locked!")
            FLAG_TAG = False
        else:
            print("username is not exists or passwd is wrong,please input agin!")
        count+=1

        # 尝试三次之后对用户进行提醒，并进行选择，q退出，g继续尝试
        while count>=3:
            print("you have input 3 times")
            q=input("input 'q' to exit or 'g' to continue").strip()
            if q == "q":
                FLAG_TAG=False
                break
            elif q == 'g':
                count = 0
                continue
            else:
                print("wrong input!")
                continue