#!/usr/bin/env python
# _*_ coding:utf-8 _*_
# File_type:一個(gè)登錄接口
# Author:smelond
import os

username = "smelond"#用戶名
password = "qweqwe"#密碼
counter = 0#計(jì)數(shù)器

#讀取黑名單
file = os.path.exists("./user.txt")#檢查當(dāng)前目錄是否有user.txt這個(gè)文件，如果有者輸出True賦給file
if file == True:#判斷是否有user.txt這個(gè)文件
 blacklist_file = open("user.txt", "r").read()#open()打開文件，并且用read()讀取文件,然后賦給blacklist_file
 if blacklist_file == username:#檢查文件里面的內(nèi)容是否和我們的用戶名相等
  print("Username lock. Please contact the administrator to remove the restrictions!!!")#輸出錯(cuò)誤提示
  exit()#退出程序

#登錄接口
for i in range(3):
 counter += 1#對(duì)每次登錄進(jìn)行計(jì)數(shù)
 input_user = input("Please input username: ")
 input_pass = input("Please input password: ")
 if input_user == username and input_pass == password:
  print("Welcome login...")
  break
 else:
  print("ERROR Incorrect username or password!!!")
  continue

#寫入黑名單
if counter == 3:#判斷我是否輸入錯(cuò)誤三次
 print("The user name has been disabled")#提示信息
 blacklist_user = open("user.txt", "a")#以追加模式打開 (從 EOF 開始, 必要時(shí)創(chuàng)建新文件)
 blacklist_user.write("%s" % username)#將用戶名寫入黑名單
 blacklist_user.close()#使用open后一定要記得調(diào)用文件對(duì)象的close()方法