图书管理系统python 代码

这里提供一个简单的图书管理系统 Python 代码：

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

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

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

    def remove_book(self, book):
        self.books.remove(book)

    def search_title(self, title):
        for book in self.books:
            if book.title == title:
                return book
        return None

    def search_author(self, author):
        result = []
        for book in self.books:
            if book.author == author:
                result.append(book)
        return result

    def search_isbn(self, isbn):
        for book in self.books:
            if book.isbn == isbn:
                return book
        return None

    def display_books(self):
        for book in self.books:
            print("Title: {} | Author: {} | ISBN: {}".format(book.title, book.author, book.isbn))

library = Library()

book1 = Book("The Great Gatsby", "F. Scott Fitzgerald", "9780743273565")
book2 = Book("To Kill a Mockingbird", "Harper Lee", "9780061120084")
book3 = Book("1984", "George Orwell", "9780451524935")

library.add_book(book1)
library.add_book(book2)
library.add_book(book3)

library.display_books()

print("\nSearching for 'The Great Gatsby'...")
result = library.search_title("The Great Gatsby")
if result:
    print("Title: {} | Author: {} | ISBN: {}".format(result.title, result.author, result.isbn))
else:
    print("Book not found.")

print("\nSearching for books by 'Harper Lee'...")
result = library.search_author("Harper Lee")
if result:
    for book in result:
        print("Title: {} | Author: {} | ISBN: {}".format(book.title, book.author, book.isbn))
else:
    print("No books found by this author.")

print("\nRemoving 'To Kill a Mockingbird'...")
library.remove_book(book2)

library.display_books()

这个代码实现了一个简单的图书管理系统，包含添加、删除、搜索和展示图书等操作。你可以根据需要进行修改和扩展。