import os

user_path=r'F:\vscode\code_list\study_list\小案例\图书管理demo_by\用户资料_by\user.txt'
books_path=r'F:\vscode\code_list\study_list\小案例\图书管理demo_by\图书资料_by'

class Library:
    def __init__(self):
        

class Visit:
    pass

class User(Library):
    pass

class Manager(Library):
    pass

class book:
    pass