请用Python实现游戏植物大战僵尸

好的，以下是Python实现植物大战僵尸的简化版代码：

import random

# 植物与僵尸的基类
class Entity:
    def __init__(self, name, hp, damage):
        self.name = name
        self.hp = hp
        self.damage = damage

    def attack(self, target):
        target.hp -= self.damage

    def is_alive(self):
        return self.hp > 0

# 植物类
class Plant(Entity):
    def __init__(self, name, hp, damage, cost):
        super().__init__(name, hp, damage)
        self.cost = cost

# 僵尸类
class Zombie(Entity):
    def __init__(self, name, hp, damage, speed):
        super().__init__(name, hp, damage)
        self.speed = speed

# 植物和僵尸的工厂类
class EntityFactory:
    @staticmethod
    def create_plant(plant_type):
        if plant_type == 'PeaShooter':
            return Plant('PeaShooter', 100, 20, 50)
        elif plant_type == 'SunFlower':
            return Plant('SunFlower', 50, 0, 25)

    @staticmethod
    def create_zombie(zombie_type):
        if zombie_type == 'NormalZombie':
            return Zombie('NormalZombie', 200, 10, 1)
        elif zombie_type == 'ConeheadZombie':
            return Zombie('ConeheadZombie', 300, 20, 1)

# 游戏管理类
class GameManager:
    def __init__(self):
        self.plants = []
        self.zombies = []

    def add_plant(self, plant_type):
        plant = EntityFactory.create_plant(plant_type)
        if plant.cost <= self.sun:
            self.sun -= plant.cost
            self.plants.append(plant)
            return True
        else:
            return False

    def add_zombie(self, zombie_type):
        zombie = EntityFactory.create_zombie(zombie_type)
        self.zombies.append(zombie)

    def game_loop(self):
        while True:
            # 随机生成僵尸
            if random.randint(0, 9) < 2:
                self.add_zombie('NormalZombie')
            else:
                self.add_zombie('ConeheadZombie')
            # 植物攻击僵尸
            for plant in self.plants:
                zombie = random.choice(self.zombies)
                plant.attack(zombie)
                if not zombie.is_alive():
                    self.zombies.remove(zombie)
            # 僵尸攻击植物
            for zombie in self.zombies:
                plant = random.choice(self.plants)
                zombie.attack(plant)
                if not plant.is_alive():
                    self.plants.remove(plant)
            # 判断游戏是否结束
            if not self.plants:
                print('Game over! Zombies win!')
                break
            elif not self.zombies:
                print('Game over! Plants win!')
                break

# 游戏入口
if __name__ == '__main__':
    game = GameManager()
    game.sun = 100
    game.add_plant('PeaShooter')
    game.add_plant('SunFlower')
    game.game_loop()

这个游戏的实现还可以更加完善，例如添加更多的植物和僵尸类型、增加关卡等。但是这个简化版的代码已经可以让你了解到如何用Python实现植物大战僵尸的游戏逻辑。