### Python 图书管理系统 示例代码与教程 以下是一个基于引用内容和专业经验设计的图书管理系统的完整示例，包含类定义、功能实现以及测试部分。 #### 1. Book 类 Book 类用于表示图书对象，包含 `title`（书名）、`author`（作者）和 `isbn`（国际标准书号）三个属性。通过 `__str__` 方法定义了打印对象时的输出格式[^3]。 ```python class Book: def __init__(self, title, author, isbn): self.title = title self.author = author self.isbn = isbn def __str__(self): return f"Title: {self.title}, Author: {self.author}, ISBN: {self.isbn}" ``` #### 2. Library 类 Library 类用于管理图书集合，包含一个 `books` 列表用于存储 `Book` 对象。提供了 `add_book`（添加图书）、`search_book`（搜索图书）和 `delete_book`（删除图书）方法[^3]。 ```python class Library: def __init__(self): self.books = [] def add_book(self, book): self.books.append(book) print(f"Book added: {book}") def search_book(self, keyword): results = [book for book in self.books if keyword.lower() in str(book).lower()] if results: print("Search Results:") for result in results: print(result) else: print("No books found matching the keyword.") def delete_book(self, isbn): initial_count = len(self.books) self.books = [book for book in self.books if book.isbn != isbn] if len(self.books) < initial_count: print(f"Book with ISBN {isbn} deleted.") else: print(f"No book found with ISBN {isbn}.") ``` #### 3. 测试部分 在 `if __name__ == "__main__"` 块中创建了一个 `Library` 实例，并进行了添加图书、搜索图书和删除图书的操作测试[^3]。 ```python if __name__ == "__main__": library = Library() # 添加图书 book1 = Book("Python编程", "张三", "1234567890") book2 = Book("数据结构", "李四", "0987654321") library.add_book(book1) library.add_book(book2) # 搜索图书 library.search_book("Python") library.search_book("结构") # 删除图书 library.delete_book("1234567890") library.search_book("Python") ``` #### 4. GUI 实现（可选） 如果需要图形用户界面，可以使用 `Tkinter` 库来实现。以下是一个简单的 GUI 示例[^2]： ```python import tkinter as tk from tkinter import messagebox class LibraryGUI: def __init__(self, root, library): self.root = root self.library = library self.root.title("图书管理系统") # 添加图书 tk.Label(root, text="书名").grid(row=0, column=0) self.title_entry = tk.Entry(root) self.title_entry.grid(row=0, column=1) tk.Label(root, text="作者").grid(row=1, column=0) self.author_entry = tk.Entry(root) self.author_entry.grid(row=1, column=1) tk.Label(root, text="ISBN").grid(row=2, column=0) self.isbn_entry = tk.Entry(root) self.isbn_entry.grid(row=2, column=1) tk.Button(root, text="添加图书", command=self.add_book_gui).grid(row=3, column=0, columnspan=2) # 搜索图书 tk.Label(root, text="搜索关键词").grid(row=4, column=0) self.keyword_entry = tk.Entry(root) self.keyword_entry.grid(row=4, column=1) tk.Button(root, text="搜索图书", command=self.search_book_gui).grid(row=5, column=0, columnspan=2) def add_book_gui(self): title = self.title_entry.get() author = self.author_entry.get() isbn = self.isbn_entry.get() if title and author and isbn: book = Book(title, author, isbn) self.library.add_book(book) self.clear_entries() else: messagebox.showwarning("输入错误", "请填写所有字段！") def search_book_gui(self): keyword = self.keyword_entry.get() if keyword: self.library.search_book(keyword) else: messagebox.showwarning("输入错误", "请输入搜索关键词！") def clear_entries(self): self.title_entry.delete(0, tk.END) self.author_entry.delete(0, tk.END) self.isbn_entry.delete(0, tk.END) if __name__ == "__main__": library = Library() root = tk.Tk() app = LibraryGUI(root, library) root.mainloop() ``` ###