一个价格字典的价格字典列表

# 初始化价格字典列表
price_dict_list = [
    {"product_id": 1, "name": "Laptop", "price": 1000, "discount": 0.1},
    {"product_id": 2, "name": "Smartphone", "price": 500, "discount": 0.05},
    {"product_id": 3, "name": "Tablet", "price": 300, "discount": 0.0}
]

# 查询特定商品的价格
def get_price(product_id):
    for item in price_dict_list:
        if item["product_id"] == product_id:
            return item["price"] * (1 - item["discount"])
    return None

# 更新商品价格
def update_price(product_id, new_price):
    for item in price_dict_list:
        if item["product_id"] == product_id:
            item["price"] = new_price
            return True
    return False

# 示例查询和更新操作
print(get_price(1))  # 输出: 900.0
update_price(1, 1200)
print(get_price(1))  # 输出: 1080.0