中文口语评测促销活动

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

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

    def apply_discount(self, original_price):
        if self.is_active(datetime.now()):
            return original_price * (1 - self.discount_rate)
        else:
            return original_price

# 示例使用
from datetime import datetime

promotion = PromotionActivity("中文口语评测季", datetime(2023, 4, 1), datetime(2023, 6, 30), 0.1)
current_price = promotion.apply_discount(100)
print(f"当前价格：{current_price}元")