基于python的网上购书系统代码

下面是一个简单的基于Python的网上购书系统的代码，包括了书籍信息的存储、查询、购买等功能。

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

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

    # 添加书籍信息
    def add_book(self, book):
        self.books.append(book)

    # 查询书籍信息
    def query_book(self, name):
        for book in self.books:
            if book.name == name:
                print(f"书名：{book.name}，作者：{book.author}，价格：{book.price}元，库存：{book.stock}本")

    # 购买书籍
    def buy_book(self, name, count):
        for book in self.books:
            if book.name == name:
                if book.stock >= count:
                    book.stock -= count
                    print(f"购买成功，共花费{book.price * count}元")
                else:
                    print("库存不足，购买失败")

# 测试代码
store = BookStore()

book1 = Book("Python基础教程", "Magnus Lie Hetland", 68.8, 100)
book2 = Book("Python编程从入门到实践", "Eric Matthes", 58.0, 50)
book3 = Book("Python核心编程", "Wesley Chun", 88.0, 80)

store.add_book(book1)
store.add_book(book2)
store.add_book(book3)

store.query_book("Python基础教程")
store.buy_book("Python基础教程", 2)
store.query_book("Python基础教程")

注意：该代码只是一个简单的示例，实际的网上购书系统需要更多的功能和完善的交互体验。