第一天作业(登陆接口)

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 要求：

• 输入用户名密码
• 登录成功显示欢迎信息
• 输错三次后锁定

Readme：

• lock_file为存放锁定用户文件,路径为F:/login/lock.txt
• user_file为存放用户名密码文件,路径为F:/login/user.csv
• 该程序会对输入的用户名进行判断，如果连续三次判断user_file里没有，则程序直接退出
• 该程序会对输入正确的用户名的密码进行判断，如果连续三次输错，则用户锁定

流程图：

code:

#!/usr/bin/env python
#Author:Daniel
# -*- coding: utf-8 -*-
#time:2017.10.24-11:00
import sys,os,getpass
n = 0
while n < 3:
    username = input("please enter your username:")
    lock_file = open("F:/login/lock.txt",'r+')
    lock_list = lock_file.readlines()
    #print(lock_list)
    user_file = open("F:/login/user.csv", 'r')
    user_list = user_file.readlines()
    #print(user_list)
    for lock_line in lock_list:
        lock_line = lock_line.strip('
')
        #print(lock_line)
        if username == lock_line:
            print ('user %s is locked,please contact the administrtor' % username)
            sys.exit('The program has exited')
    else:
        for user_line in user_list:
                #print(user_line)
            (user,passwd) = user_line.strip('
').split()
            if username == user:
                p = 0
                while p < 3:
                    password = getpass.getpass(('please enter a password for the %s user:') % username)
                    if password == passwd:
                        print ('wlecome to %s login system' % username)
                        sys.exit()
                    else:
                        print ("Sorry, faker user's password input error,you have %d input opportunities" % (2 - p))
                        p += 1
                else:
                    if p == 3:
                        lock_file.write(username + '
')
                        sys.exit('Sorry,%s user is locked,please contact the adminisrator' % username)
    n += 1
else:
    sys.exit('Input error. The program has exited. Please rerun')
lock_file.close()
user_file.close()

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