模拟登录需求：

1. 用户输入帐号密码进行登陆

2. 账户输入错误直接退出，账户正确，密码错误3次锁定

i = 1infor = {
   'zhanyie': 'abc123',         'jack': '123bca',         'tom': '132456'         }name = input('please input your account: ')while i <= 3:    if name not in infor.keys():        print('you need to register an account!')        break    else:        pass_word = input('please input your password: ')        for name_1 in infor.keys():            if name == name_1 and pass_word == infor[name_1]:                print('Welcome')                break            elif i < 3 and name == name_1 and pass_word != infor[name_1]:                print('your password is wrong,try again')                i += 1                continue            elif i == 3 and name == name_1 and pass_word != infor[name_1]:                print('you are locked')