用python写一个图书管理系统

好的，下面是一个简单的图书管理系统的 Python 代码示例：

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

class Library:
    def __init__(self):
        self.books = []

    def add_book(self, book):
        self.books.append(book)

    def remove_book(self, book_name):
        for book in self.books:
            if book.name == book_name:
                self.books.remove(book)
                print(f"{book_name} has been removed from the library.")
                return
        print(f"{book_name} is not in the library.")

    def search_book(self, book_name):
        for book in self.books:
            if book.name == book_name:
                print(f"{book.name} by {book.author}, published in {book.year}")
                return
        print(f"{book_name} is not in the library.")

    def display_books(self):
        for book in self.books:
            print(f"{book.name} by {book.author}, published in {book.year}")

library = Library()

book1 = Book("The Great Gatsby", "F. Scott Fitzgerald", 1925)
book2 = Book("To Kill a Mockingbird", "Harper Lee", 1960)

library.add_book(book1)
library.add_book(book2)

library.display_books()

library.search_book("The Great Gatsby")

library.remove_book("To Kill a Mockingbird")

library.display_books()

这个示例代码定义了两个类：`Book` 和 `Library`。`Book` 类表示图书，包含图书名称、作者和出版年份；`Library` 类表示图书馆，包含一个列表 `books`，可以添加、删除、搜索和显示图书。

在主程序中，我们实例化一个 `Library` 对象，并向其添加两本图书。然后，我们展示图书馆中所有的图书，搜索特定的图书，删除另外一本图书，最后再次展示图书馆中所有的图书。