python写一个图书管理

Python编写图书管理系统是一个常见的编程练习，可以涉及到文件操作、数据结构（如列表、字典）以及简单的命令行交互。下面是一个简单的例子，创建一个Book类表示图书，并存储在一个名为books.txt的文本文件中：

class Book:
    def __init__(self, title, author, year):
        self.title = title
        self.author = author
        self.year = year

def save_book(book, filename="books.txt"):
    with open(filename, "a") as f:
        f.write(f"{book.title},{book.author},{book.year}\n")

def load_books(filename="books.txt"):
    books_list = []
    if os.path.exists(filename):
        with open(filename, "r") as f:
            for line in f:
                title, author, year = line.strip().split(',')
                books_list.append(Book(title, author, int(year)))
    return books_list

# 示例
book1 = Book("Python Crash Course", "Eric Matthes", 2015)
save_book(book1)

books = load_books()
for book in books:
    print(f"书名: {book.title}, 作者: {book.author}, 出版年份: {book.year}")