我店模式与万免臻选模式：解决商家拓留客问题，刺激消费内循环。

python复制代码# 导入必要的库  import random  from datetime import datetime, timedelta    # 数据库模拟（在实际中，你会使用数据库如MySQL, PostgreSQL等）  class Database:      def __init__(self):          self.users = []          self.merchants = []          self.transactions = []          self.integral_pool = {              'total_integral': 0,              'last_dividend_time': datetime.now(),              'dividend_threshold': 1.15  # 假设每增长15%分红          }        def add_user(self, user):          self.users.append(user)        def add_merchant(self, merchant):          self.merchants.append(merchant)        def add_transaction(self, transaction):          self.transactions.append(transaction)          self.update_integral_pool(transaction)        def update_integral_pool(self, transaction):          # 更新积分池逻辑（简化）          self.integral_pool['total_integral'] += transaction.integral          if (self.integral_pool['total_integral'] / self.integral_pool['total_integral'] * 100) >= self.integral_pool['dividend_threshold'] * 100:              self.distribute_dividends()              self.integral_pool['last_dividend_time'] = datetime.now()              self.integral_pool['dividend_threshold'] *= 1.15  # 增加分红阈值        def distribute_dividends(self):          # 分红逻辑（简化）          dividend_amount = self.integral_pool['total_integral'] * 0.05  # 假设5%的分红比例          for user in self.users:              user.receive_dividend(dividend_amount / len(self.users))    # 用户模型  class User:      def __init__(self, user_id, name):          self.user_id = user_id          self.name = name          self.integrals = 0          self.coupons = []        def receive_dividend(self, amount):          self.integrals += amount          print(f"{self.name} received dividend: {amount}")    # 商家模型  class Merchant:      def __init__(self, merchant_id, name, discount_rate):          self.merchant_id = merchant_id          self.name = name          self.discount_rate = discount_rate    # 交易模型  class Transaction:      def __init__(self, user, merchant, amount, discount_rate):          self.user = user          self.merchant = merchant          self.amount = amount          self.discount_rate = discount_rate          self.integral = int(amount * discount_rate / 100)    # 示例使用  if __name__ == "__main__":      db = Database()        # 添加用户      db.add_user(User(1, "Alice"))      db.add_user(User(2, "Bob"))        # 添加商家      db.add_merchant(Merchant(1, "Store A", 20))      db.add_merchant(Merchant(2, "Store B", 17))        # 模拟交易      db.add_transaction(Transaction(db.users[0], db.merchants[0], 100, 20))      db.add_transaction(Transaction(db.users[1], db.merchants[1], 200, 17))        # 假设有更多的交易和数据更新，以触发分红      # ...        # 打印积分池状态      print(f"Integral Pool Total: {db.integral_pool['total_integral']}")      print(f"Last Dividend Time: {db.integral_pool['last_dividend_time']}")      print(f"Dividend Threshold: {db.integral_pool['dividend_threshold'] * 100}%")