抽象工厂

创建一系列复杂对象

每个工厂生产一套对象

可以给一套系统做限制

有利于产品的一致性

难以支持新种类的抽象产品

---

抽象产品

class PhoneShell(metaclass=ABCMeta):
    @abstractmethod
    def show_shell(self):
        pass

class CPU(metaclass=ABCMeta):
    @abstractmethod
    def show_cpu(self):
        pass

class OS(metaclass=ABCMeta):
    @abstractmethod
    def show_os(self):
        pass

---

抽象工厂

class PhoneFactory(metaclass=ABCMeta):

    @abstractmethod
    def make_shell(self):
        pass

    @abstractmethod
    def make_cpu(self):
        pass

    @abstractmethod
    def make_os(self):
        pass

---

具体产品

class SmallShell(PhoneShell):
    def show_shell(self):
        print('普通手机小手机壳')


class BigShell(PhoneShell):
    def show_shell(self):
        print('普通手机大手机壳')


class AppleShell(PhoneShell):
    def show_shell(self):
        print('苹果手机壳')


class SnapDragonCPU(CPU):
    def show_cpu(self):
        print('骁龙CPU')


class MediaTekCPU(CPU):
    def show_cpu(self):
        print('联发CPU')


class AppleCPU(CPU):
    def show_cpu(self):
        print('苹果CPU')


class Android(OS):
    def show_os(self):
        print('Android系统')


class IOS(OS):
    def show_os(self):
        print('iOS系统')

---

具体工厂

小米手机

class MiFactory(PhoneFactory):

    def make_cpu(self):
        return SnapDragonCPU()

    def make_os(self):
        return Android()

    def make_shell(self):
        return BigShell()

苹果手机

class IPhoneFactory(PhoneFactory):

    def make_cpu(self):
        return AppleCPU()

    def make_os(self):
        return IOS()

    def make_shell(self):
        return AppleShell()

---

客户端

class Phone:
    def __init__(self, cpu, os, shell):
        self.cpu = cpu
        self.os = os
        self.shell = shell

    def show_info(self):
        print('手机信息:')
        self.cpu.show_cpu()
        self.os.show_os()
        self.shell.show_shell()

def make_phone(factory):
    cpu = factory.make_cpu()
    os = factory.make_os()
    shell = factory.make_shell()
    return Phone(cpu, os, shell)

# 生成 小米手机
p1 = make_phone(MiFactory())
p1.show_info()

# 生成 苹果手机
p2 = make_phone(IPhoneFactory())
p2.show_info()