day1-登录

1、流程图

2、代码

#!/usr/bin/env python
#-*- coding:utf-8 -*-
#Author: Tony Chiu
#Blog:http://www.cnblogs.com/tonychiu
#Github:https://github.com/qiujichun
'''
match.txt
    user1:pass1
    user2:pass2
    user3:pass3
    user4:pass4
locked.txt
    u1
    u2
    u3
'''
import sys
retry_count = 0

#指定账户、锁定信息路径
account_file = (r'match.txt')
locked_file = (r'locked.txt')

# 输入用户名
username = input("Insert your name:")

# 判断用户是否锁定
lockinfo = open(locked_file, "r")
for line in lockinfo.readlines():
    if username == line.strip():
        print("Your account %s is be locked"%username)
        sys.exit()
lockinfo.close()

#匹配用户名和密码
for i in range(3):
    retry_count = retry_count+1
    password = input("Insert password:")
    userinfo = open(account_file, "r")
    for line in userinfo.readlines():
        User, Pass = line.strip().split(':')
        if username == User and password == Pass:
            print("Success!")
            sys.exit()
        else:
            continue
    userinfo.close()

    #尝试密码超过3次将锁定账户
    if retry_count == 3:
        print("Too many attempts,%s will be locked...."%username)
        lockinfo = open(locked_file, "a")
        lockinfo.write('
' + username)
        lockinfo.close()
        sys.exit()

3、测试

3.1输入已被锁定的用户

Insert your name:u1
Your account u1 is be locked

Process finished with exit code 0

3.2输入正确信息

Insert your name:user1
Insert password:pass1
Success!

Process finished with exit code 0

3.3输出错误密码3次

Insert your name:user1
Insert password:
Insert password:
Insert password:
Too many attempts,user1 will be locked....