新闻管理系统DOS里面录入账号密码后进入另一界面无显示

我输入后没有看到有打印，数据库t_role表中储存角色有新闻编辑和管理员，

#!/usr/bin/python
# -*- coding: UTF-8 -*-
from colorama import Fore,Style
from getpass import getpass
from service.user_service import UserService
import os
import sys
import time

__user_service=UserService()
while True:
    os.system("cls")
    print(Fore.LIGHTBLUE_EX,"\n\t==================")
    print(Fore.LIGHTBLUE_EX,"\n\t欢迎使用新闻管理系统")
    print(Fore.LIGHTBLUE_EX, "\n\t==================")
    print(Fore.LIGHTGREEN_EX,"\n\t1.登陆系统")
    print(Fore.LIGHTGREEN_EX,"\n\t2.退出系统")
    print(Style.RESET_ALL)
    opt=input("\n\t输入操作编号:")
    if opt=="1":
        username=input("\n\t用户名:")
        password=getpass("\n\t密码:")
        result=__user_service.login(username,password)
        print(result)
        #登陆成功
        if result==True:
            #查询角色
            role=__user_service.search_user_role(username)
            while True:
                os.system("cls")
                if role=="新闻编辑":
                    print('test')
                elif role=="管理员":
                    print(Fore.LIGHTGREEN_EX,"\n\t1.新闻管理")
                    print(Fore.LIGHTGREEN_EX, "\n\t2.用户管理")
                    print(Fore.LIGHTRED_EX, "\n\tback.退出登陆")
                    print(Fore.LIGHTRED_EX, "\n\texit.退出系统")
                    print(Style.RESET_ALL)
                    opt = input("\n\t输入操作编号:")
                    if opt=="1":
                        while True:
                            os.system("cls")
                            print(Fore.LIGHTRED_EX, "\n\t1.审批新闻")
                            print(Fore.LIGHTBLACK_EX,"\n\t2.删除新闻")
                            print(Fore.LIGHTCYAN_EX, "\n\tback.返回上一层")
                    elif opt=="back":
                        break
                    elif opt=="exit":
                        sys.exit(0)
        else:
            print("\n\t登录失败(3秒自动返回)")
            time.sleep(3)#休眠3s钟
    elif opt=="2":
        sys.exit(0)#释放后安全退出

同学，你好！

app.py中的代码可以登陆进去，同学发一下user_service.py 和 user_dao.py中的代码

祝学习愉快~