python学习（一）

需求：用户名输入3次不对后即被锁定

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:hx
counter = 0 #添加计数器
#创建黑名单文档，第一次创建文档时使用，文档被创建后即可隐去。
#f = open('black_user.txt','w') 
#f.close()

file = open('black_user.txt','r')
lock_file = file.read()
file.close()
username = 'hx'
password = 'hx'
user_name = input('please input your name:')
for i in range(1):
    if user_name == lock_file:
        print("你的用户已被锁定，请联系管理员")
        exit()
    else:
        continue

for i in range(4):
    if counter<3:
        user_pass =  input('please input your password')
        if password == user_pass:
            print("welcome to login.....")
            break
        else:
            print("please login again...")
        counter = counter + 1
    else:
        print("你输入超过3次，你输入的用户将被锁定，请联系管理员")
        file = open('black_user.txt','w')
        file.write('%s'%user_name)
        file.close()