4.6_builder_创建型模式：建造者模式

from abc import ABCMeta, abstractmethod


class Player(object):
    def __init__(self, face=None, body=None, arm=None, leg=None):
        self.face = face
        self.body = body
        self.arm = arm
        self.leg = leg

    def __str__(self):
        return f'{self.face}, {self.body}, {self.arm}, {self.leg}'


class PlayerBuilder(metaclass=ABCMeta):
    """抽象建造者 (Builder)"""

    @abstractmethod
    def build_face(self):
        pass

    @abstractmethod
    def build_body(self):
        pass

    @abstractmethod
    def build_arm(self):
        pass

    @abstractmethod
    def build_leg(self):
        pass


class SexyGirlBuilder(PlayerBuilder):
    """具体建造者 (Concrete Builder)"""

    def __init__(self):
        self.player = Player()

    def build_face(self):
        self.player.face = '漂亮脸蛋'

    def build_body(self):
        self.player.body = '苗条'

    def build_arm(self):
        self.player.arm = '漂亮胳膊'

    def build_leg(self):
        self.player.leg = '大长腿'


class Monster(PlayerBuilder):
    """具体建造者 (Concrete Builder)"""

    def __init__(self):
        self.player = Player()

    def build_face(self):
        self.player.face = '怪兽脸'

    def build_body(self):
        self.player.body = '怪兽身材'

    def build_arm(self):
        self.player.arm = '长毛的胳膊'

    def build_leg(self):
        self.player.leg = '长毛的腿'


class PlayerDirector(object):
    """
    指挥者 (Director)
    控制组装顺序
    """

    def build_player(self, builder):
        builder.build_body()
        builder.build_face()
        builder.build_arm()
        builder.build_leg()
        return builder.player


# --- Client ---
# 产品 (Product)
builder = Monster()
director = PlayerDirector()
p = director.build_player(builder)
print(p)