企业金融服务平台新年促销

class Promotion:
    def __init__(self, name, discount_rate, start_date, end_date):
        self.name = name
        self.discount_rate = discount_rate
        self.start_date = start_date
        self.end_date = end_date

    def is_valid(self, current_date):
        return self.start_date <= current_date <= self.end_date

def apply_promotion(promotions, current_date, original_price):
    for promo in promotions:
        if promo.is_valid(current_date):
            return original_price * (1 - promo.discount_rate)
    return original_price

# 示例使用
promotions = [
    Promotion("New Year Sale", 0.1, "2023-01-01", "2023-01-31"),
    Promotion("Spring Festival Special", 0.15, "2023-02-01", "2023-02-15")
]

current_date = "2023-01-15"
original_price = 1000
discounted_price = apply_promotion(promotions, current_date, original_price)
print(f"Discounted Price: ${discounted_price:.2f}")