用单链表实现图书管理

图书管理可以使用单链表来实现，每个节点表示一本书，包含书名、作者、出版社、出版日期、ISBN号等信息。以下是一个简单的示例代码：

class Book:
    def __init__(self, title, author, publisher, pub_date, isbn):
        self.title = title
        self.author = author
        self.publisher = publisher
        self.pub_date = pub_date
        self.isbn = isbn
        self.next_book = None

class BookList:
    def __init__(self):
        self.head = None

    def add_book(self, book):
        if not self.head:
            self.head = book
        else:
            current = self.head
            while current.next_book:
                current = current.next_book
            current.next_book = book

    def remove_book(self, isbn):
        if not self.head:
            return False
        if self.head.isbn == isbn:
            self.head = self.head.next_book
            return True
        current = self.head
        while current.next_book:
            if current.next_book.isbn == isbn:
                current.next_book = current.next_book.next_book
                return True
            current = current.next_book
        return False

    def search_book(self, isbn):
        current = self.head
        while current:
            if current.isbn == isbn:
                return current
            current = current.next_book
        return None

可以通过创建 `Book` 类来表示一本书，将每个节点作为一个 `Book` 实例来存储在单链表中。在 `BookList` 类中，`add_book` 方法用于向链表中添加一本新书，`remove_book` 方法用于从链表中删除指定 ISBN 号的书，`search_book` 方法用于在链表中查找指定 ISBN 号的书。