用Python设计一个图书借阅管理系统包括查询添加借阅归还图书

在Python中设计一个简单的图书借阅管理系统，我们可以使用面向对象的方式，创建三个类：`Book`, `User`, 和 `Library`。这里是一个基础的示例：

class Book:
    def __init__(self, id, title, available):
        self.id = id
        self.title = title
        self.available = available

class User:
    def __init__(self, id, name):
        self.id = id
        self.name = name
        self.borrowed_books = []

    def borrow_book(self, book_id):
        if book_id in [book.id for book in self.borrowed_books]:
            return "这本书已经被你借过"
        if book_id not in [book.id for book in Library.books_available]:
            return "这本书已经借完了"
        borrowed_book = Library.books_available[book_id]
        Library.books_available.remove(borrowed_book)
        self.borrowed_books.append(borrowed_book)
        return f"{self.name}成功借阅了{borrowed_book.title}"

    def return_book(self, book_id):
        if book_id not in self.borrowed_books:
            return "你没有借过这本书"
        returned_book = self.borrowed_books.pop(book_id)
        Library.books_available.append(returned_book)
        return f"{self.name}归还了{returned_book.title}"


class Library:
    books_available = {}  # 假设图书库存已初始化

    @classmethod
    def add_book(cls, book_id, title):
        new_book = Book(book_id, title, True)
        cls.books_available[book_id] = new_book

    @classmethod
    def query_book(cls, book_id):
        if book_id in cls.books_available:
            return cls.books_available[book_id]
        else:
            return "未找到该书"

# 使用示例
Library.add_book(1, "Python入门")
library = Library()
user = User(1, "Alice")

print(user.borrow_book(1))  # Alice成功借阅了Python入门
print(library.query_book(1))  # 查询书籍
user.return_book(1)  # Alice归还了Python入门

在这个例子中，`add_book` 方法用于添加新书，`query_book` 查找书籍信息，用户通过 `borrow_book` 和 `return_book` 方法操作书籍。注意这只是一个基本框架，实际应用中可能需要更复杂的数据验证、错误处理和数据库交互。