python下载安装-Day19 面向对象相关知识.rar

-类与类之间的关系 - is-a关系：继承 - has-a关系：关联 / 聚合 / 合成 - use-a关系：依赖 例子：扑克游戏。 ```Python """ 经验：符号常量总是优于字面常量，枚举类型是定义符号常量的最佳选择 """ from enum import Enum, unique import random @unique class Suite(Enum): """花色""" SPADE, HEART, CLUB, DIAMOND = range(4) def __lt__(self, other): return self.value < other.value class Card(): """牌""" def __init__(self, suite, face): """初始化方法""" self.suite = suite self.face = face def show(self): """显示牌面""" suites = ['♠︎', '♥︎', '♣︎', '♦︎'] faces = ['', 'A', '2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K'] return f'{suites[self.suite.value]}{faces[self.face]}' def __repr__(self): return self.show() class Poker(): """扑克""" def __init__(self): self.index = 0 self.cards = [Card(suite, face) for suite in Suite for face in range(1, 14)] def shuffle(self): """洗牌（随机乱序）""" random.shuffle(self.cards) self.index = 0 def deal(self): """发牌""" card = self.cards[self.index] self.index += 1 return card @property def has_more(self): return self.index < len(self.cards) class Player(): """玩家""" def __init__(self, name): self.name = name self.cards = [] def get_one(self, card): """摸一张牌""" self.cards.append(card) def sort(self, comp=lambda card: (card.suite, card.face)): """整理手上的牌""" self.cards.sort(key=comp) def main(): """主函数""" poker = Poker() poker.shuffle() players = [Player('东邪'), Player('西毒'), Player('南帝'), Player('北丐')] while poker.has_more: for player in players: player.get_one(poker.deal()) for player in players: player.sort() print(player.name, end=': ') print(player.cards) if __name__ == '__main__': main()