用单链表写一个图书信息管理系统

这是一个基于单链表的图书信息管理系统，支持添加图书、删除图书、查找图书和显示所有图书信息等基本操作：

class Book:
    def __init__(self, name, author, price, pub_date):
        self.name = name
        self.author = author
        self.price = price
        self.pub_date = pub_date
        self.next = None

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

    def add_book(self, name, author, price, pub_date):
        book = Book(name, author, price, pub_date)
        if self.head is None:
            self.head = book
        else:
            node = self.head
            while node.next is not None:
                node = node.next
            node.next = book

    def remove_book(self, name):
        if self.head is None:
            return
        if self.head.name == name:
            self.head = self.head.next
            return
        node = self.head
        while node.next is not None:
            if node.next.name == name:
                node.next = node.next.next
                return
            node = node.next

    def find_book(self, name):
        node = self.head
        while node is not None:
            if node.name == name:
                return node
            node = node.next
        return None

    def display_books(self):
        node = self.head
        while node is not None:
            print(f"{node.name}\t{node.author}\t{node.price}\t{node.pub_date}")
            node = node.next

下面是一个简单的使用示例：

book_list = BookList()
book_list.add_book("Python深度学习", "Francois Chollet", 99.0, "2018-10-08")
book_list.add_book("机器学习实战", "Peter Harrington", 69.0, "2012-06-08")
book_list.add_book("深入浅出机器学习", "李航", 59.0, "2012-04-01")
book_list.display_books()
book_list.remove_book("Python深度学习")
book_list.display_books()
book = book_list.find_book("机器学习实战")
if book is not None:
    print(f"找到了书籍：{book.name}\t{book.author}\t{book.price}\t{book.pub_date}")
else:
    print("没有找到该书籍")

输出结果：

Python深度学习	Francois Chollet	99.0	2018-10-08
机器学习实战	Peter Harrington	69.0	2012-06-08
深入浅出机器学习	李航	59.0	2012-04-01
机器学习实战	Peter Harrington	69.0	2012-06-08
找到了书籍：机器学习实战	Peter Harrington	69.0	2012-06-08