使用 Python 编写登陆接口

# 使用 Python 编写登陆接口
# Create Date: 2017.10.31 Tuesday
# Author: Eric Zhao
# -*- coding:utf-8 -*-
'''
编写登陆接口
输入用户名密码
认证成功后显示欢迎信息
输错三次后锁定 
'''
login_user = input('Please input user name..')
# obj_u = '\''+login_user+'\''
# print(obj_u)
password = input('Please input password..')
users = open('users.txt')
obj_users = eval(users.readline())
# print(type(obj_users))
# blacklist = open('blacklist.txt')
# print(type(blacklist))
'''
line = blacklist.readline()
bl = line.rstrip()
print(bl+' bl')
blacklist.close()
'''
try:
    blacklist = open('blacklist.txt')
except FileNotFoundError:
    blacklist = open('blacklist.txt','w') # 没有就创建此文件
    blacklist = open('blacklist.txt')

for line in blacklist:
    bl = line.rstrip()
    if bl == login_user:
        print(login_user + ' is locked!')
        blacklist.close()
        break
else:
    blacklist.close()
    count = 0
    if login_user in obj_users:
        print(login_user + ' is valid account.')
        if password == obj_users.get(login_user):
            print('Welcome ' + login_user + '.')
        else:
            while count <= 1:
                password = input('The password is wrong,Please input again:')
                if password == obj_users.get(login_user):
                    print('Welcome ' + login_user + '.')
                    break
                count += 1
            else:
                print('Your account has been locked!')
                # 指定打开文件的模式，a为追加
                blacklist = open('blacklist.txt','a')
                blacklist.write(login_user +'\n')
                blacklist.close()
    else:
        print(login_user + ' does not exist!')