python购买商品的程序

在Python中编写一个简单的购物车程序，可以模拟用户选择商品、添加到购物车以及查看总价的过程。这里是一个基础示例：

class Product:
    def __init__(self, name, price):
        self.name = name
        self.price = price

    def total_price(self):
        return self.price

class ShoppingCart:
    def __init__(self):
        self.items = []

    def add_item(self, product):
        self.items.append(product)
    
    def remove_item(self, item_name):
        for i, product in enumerate(self.items):
            if product.name == item_name:
                del self.items[i]
                break
    
    def get_total_price(self):
        total = 0
        for item in self.items:
            total += item.total_price()
        return total

# 示例商品
apple = Product('苹果', 5)
banana = Product('香蕉', 3)

# 购物操作
cart = ShoppingCart()
cart.add_item(apple)  # 添加商品
cart.add_item(banana)

print(f"购物车中有：{cart.get_total_items()}")
print(f"总价：{cart.get_total_price()}")
cart.remove_item('苹果')  # 移除商品
print("移除苹果后，新的总价：", cart.get_total_price())