# 抽象工厂

```python
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time    : 2019/10/7 5:16 PM
# @Author  : xinfa.jiang
# @Site    : 
# @File    : abstract_factory.py
# @Software: PyCharm
'''

抽象工厂模式
'''
from abc import ABCMeta, abstractmethod


class AbstractProductA(object):
    """
    抽象产品A, 可能拥有多种实现
    """

    def __init__(self, name):
        self.name = name

    def __str__(self):
        return "ProductA: %s" % self.name


class AbstractProductB(object):
    """
    抽象产品B, 可能拥有多种实现
    """

    def __init__(self, name):
        self.name = name

    def __str__(self):
        return "ProductB: %s" % self.name


class ConcreteProductA1(AbstractProductA):
    '''
    具体产品A1
    '''
    pass


class ConcreteProductA2(AbstractProductA):
    '''
    具体产品A2
    '''
    pass


class ConcreteProductB1(AbstractProductB):
    pass


class ConcreteProductB2(AbstractProductB):
    pass


class AbstractFactory(object):
    """
    抽象工厂接口, 包含所有产品创建的抽象方法
    __metaclass__参考：https://www.cnblogs.com/xybaby/p/7927407.html
    """
    __metaclass__ = ABCMeta

    @abstractmethod
    def create_product_a(self):
        pass

    @abstractmethod
    def create_product_b(self):
        pass


class ConcreteFactory1(AbstractFactory):
    """
    具体工厂, 创建具有特定实现的产品对象
    """

    def create_product_a(self):
        return ConcreteProductA1("PA1")

    def create_product_b(self):
        return ConcreteProductB1("PB1")


class ConcreteFactory2(AbstractFactory):
    def create_product_a(self):
        return ConcreteProductA2("PA2")

    def create_product_b(self):
        return ConcreteProductB2("PB2")


if __name__ == '__main__':
      # 抽象工厂先制造抽象实例，再通过抽象实例制造最终实例
    factory = ConcreteFactory2()

    product_a = factory.create_product_a()
    print(product_a)
#ProductA: PA2
```


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