信鸽双12促销活动

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

    def add_item(self, item):
        self.items.append(item)

    def calculate_total(self):
        total = sum(item.price for item in self.items)
        return total

    def apply_promotion(self, promotion):
        if promotion['type'] == '满减':
            if self.calculate_total() >= promotion['threshold']:
                return self.calculate_total() - promotion['discount']
        return self.calculate_total()

# 示例商品
class Item:
    def __init__(self, name, price):
        self.name = name
        self.price = price

# 创建购物车并添加商品
cart = ShoppingCart()
cart.add_item(Item("手机", 2000))
cart.add_item(Item("耳机", 200))

# 定义满减促销规则
promotion = {
    'type': '满减',
    'threshold': 2000,
    'discount': 200
}

# 计算最终价格
final_price = cart.apply_promotion(promotion)
print(f"最终价格: {final_price} 元")