3.综合案例：群主发红包 群主发普通红包。某群有多名成员，群主给成员发普通红包。 普通红包的规则： (1)群主的一笔金额，从群主余额中扣除，分成份，让成 员领取随机金额（假设随机金额在0.01与剩余平均值*2之 间)。 (2)成员领取红包后，存储到成员的余额中。 请根据上述描述，完成案例中所有类的定义以及指定类之间的 继承关系，并完成发红包、领红包的操作。

以下是一个可能的实现方式：

类定义：

1. 用户类 User
属性：
- 用户ID
- 余额

方法：
- 领取红包(receive_red_packet)

2. 群主类 GroupOwner
继承自用户类

属性：
- 群主ID
- 余额

方法：
- 发送红包(send_red_packet)

3. 群成员类 GroupMember
继承自用户类

属性：
- 成员ID

方法：
- 无

4. 红包类 RedPacket

属性：
- 红包金额
- 领取状态（已领取的金额）

方法：
- 领取红包(receive)

实现：

import random

class User:
    def __init__(self, user_id, balance):
        self.user_id = user_id
        self.balance = balance

    def receive_red_packet(self, amount):
        self.balance += amount

class GroupOwner(User):
    def __init__(self, user_id, balance):
        super().__init__(user_id, balance)

    def send_red_packet(self, members):
        total_amount = self.balance
        count = len(members)
        avg_amount = total_amount / count
        for i in range(count):
            if i == count - 1:
                amount = total_amount
            else:
                max_amount = min(avg_amount * 2, total_amount - avg_amount * (count - i - 1))
                amount = round(random.uniform(0.01, max_amount), 2)
            members[i].receive_red_packet(amount)
            total_amount -= amount

class GroupMember(User):
    def __init__(self, user_id, balance=0):
        super().__init__(user_id, balance)

class RedPacket:
    def __init__(self, amount):
        self.amount = amount
        self.received_amount = 0

    def receive(self):
        if self.received_amount >= self.amount:
            return None
        max_amount = min(self.amount - self.received_amount, 2 * self.amount / 3)
        amount = round(random.uniform(0.01, max_amount), 2)
        self.received_amount += amount
        return amount

使用样例：

# 初始化群主和群成员
owner = GroupOwner('1', 100)
members = [GroupMember(str(i)) for i in range(2, 5)]

# 群主发红包
red_packet = RedPacket(owner.balance)
owner.send_red_packet(members)

# 群成员领红包
for member in members:
    amount = red_packet.receive()
    if amount is not None:
        member.receive_red_packet(amount)

# 显示结果
print('群主余额:', owner.balance)
for member in members:
    print(f'成员{member.user_id}余额:', member.balance)