Python小案例：回合制奥特曼打怪兽游戏

from abc import ABCMeta, abstractmethod
from random import randint, randrange
import time


class Fighter(object, metaclass=ABCMeta):
    """战斗者"""
    # 通过__slots__魔法限定对象可以绑定的成员变量
    __slots__ = ('_name', '_hp')

    def __init__(self, name, hp):
        """
        构造器
        :param name: 名字
        :param hp: 生命值
        """
        self._name = name
        self._hp = hp

    @property
    def name(self):
        return self._name

    @property
    def hp(self):
        return self._hp

    @hp.setter
    def hp(self, hp):
        self._hp = hp

    @property
    def alive(self):
        return self._hp > 0

    @abstractmethod
    def attack(self, other):
        """
        攻击
        :param other:被攻击的对象
        :return:
        """
        pass


class Ultraman(Fighter):
    """奥特曼"""
    __slots__ = ('_name', '_hp', '_mp')

    def __init__(self, name, hp, mp):
        """
        构造器
        :param name: 名字
        :param hp: 生命值
        :param mp: 魔法值
        """
        super().__init__(name, hp)
        self._mp = mp

    def attack(self, other):
        other.hp -= randint(15, 25)

    def huge_attack(self, other):
        """
        究极必杀技（打掉对方至少50滴血或者四分之三）
        :param other: 被攻击对象
        :return: 使用必杀技成功返回True否则返回False
        """
        if self._mp >= 50:
            self._mp -= 50
            injury = other.hp * 3 // 4
            if injury >= 50:
                injury = injury
            else:
                injury = 50
            other.hp -= injury
            return True
        else:
            self.attack(other)
            return False

    def magic_attack(self, others):
        """
        魔法攻击
        :param others: 被攻击的群体
        :return: 使用魔法成功返回True 不成功False
        """
        if self._mp >= 20:
            self._mp -= 20
            for temp in others:
                if temp.alive:
                    temp.hp -= randint(10, 15)
            return True
        else:
            return False

    def resume(self):
        """恢复魔法值"""
        incr_point = randint(1, 10)
        self._mp += incr_point
        return incr_point

    def __str__(self):
        return '~~~%s奥特曼~~~\n' % self._name + \
               '生命值：%d\n' % self._hp + \
               '魔法值：%d\n' % self._mp


class Monster(Fighter):
    """小怪兽"""
    __slots__ = ('_name', '_hp')

    def attack(self, other):
        other.hp -= randint(10, 20)

    def __str__(self):
        return '~~~%s小怪兽~~~\n' % self._name + \
               '生命值：%d\n' % self._hp


def is_any_alive(monsters):
    """判断有没有小怪兽是活着的"""
    for monster in monsters:
        if monster.alive > 0:
            return True
    return False


def select_alive_one(monsters):
    """选中一只或者的怪兽"""
    monsters_len = len(monsters)
    while True:
        index = randrange(monsters_len)
        monster = monsters[index]
        if monster.alive > 0:
            return monster


def display_info(ultraman, monsters):
    """显示奥特曼和小怪兽的信息"""
    print(ultraman)
    for monster in monsters:
        print(monster, end=' ')


def main():
    u = Ultraman('她与断剑', 1000, 120)
    m1 = Monster('哥斯拉', 250)
    m2 = Monster('大白鲨', 500)
    m3 = Monster('苍井空', 750)
    ms = [m1, m2, m3]
    fight_round = 1
    while u.alive and is_any_alive(ms):
        print('========第%02d回合========' % fight_round)
        m = select_alive_one(ms)  # 选中一只小怪兽
        skill = randint(1, 10)  # 通过随机数选择使用哪种攻击方法
        if skill < 6:  # 60%概率是普攻
            print('%s使用普通攻击打了%s的伤害' % (u.name, m.name))
            u.attack(m)
            print('%s的魔法值回复了%d点' % (u.name, u.resume()))
        elif skill <= 9:  # 30%概率使用了魔法攻击，魔法值不足还会失败
            if u.magic_attack(ms):
                print('%s使用了魔法攻击' % u.name)
            else:
                print('%s使用魔法失败' % u.name)
        else:  # 10%的概率使用大招 魔法不足放不出来
            if u.huge_attack(m):
                print('%s使用大招虐了%s' % (u.name, m.name))
            else:
                print('%s普攻了%s' % (u.name, m.name))
                u.attack(m)
                print('%s的魔法值回复了%d点' % (u.name, u.resume()))
        if m.alive > 0:
            print('%s回击了%s' % (m.name, u.name))
            m.attack(u)

        display_info(u, ms)  # 每个回合结束后显示奥特曼和小怪兽的信息
        fight_round += 1
        time.sleep(3)
    print('\n========战斗结束！========\n')
    if u.alive > 0:
        print('%s奥特曼胜利' % u.name)
    else:
        print('小怪兽胜利')


if __name__ == '__main__':
    main()

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