py18-作业

1、可以支持多个用户登录 (提示，通过列表存多个账户信息)

用户3次认证失败后，退出程序，再次启动程序尝试登录时，还是锁定状态（提示:需把用户锁定的状态存到文件里）

#!/usr/bin/env python3#-*- coding:utf-8 -*-#Author: Zhang Lei

userdict = {"enven":111,"jack":222,"eray":333,"bike":444}
count = 0
num = 0

while count < 3:
    username = input("What‘s your name? ")
    f = open("name.txt")
    date = f.readlines()
    date = ‘‘.join(date).strip(‘\n‘)
    f.close()

    if username in date:
        print ("sorry,your account is blocked.")
        break
    else:
        if username not in userdict:
            print("no,you guess error...")
            count += 1
            continue
        elif username in userdict:
            print("year,input success...")

            while num < 3:
                passwd = input("plz input your passwd:")
                if passwd == str(userdict[username]):
                    print("Yes, congratulations to you...")
                    break
                elif num == 2:
                    print("You are locked:", username)
                    f = open(‘name.txt‘,‘a+‘)
                    f.write(username +‘\n‘)
                    f.close
                    break
                else:
                    print("plz input your passwd again:")
                    num += 1

            break