************************
设计模式
************************

Mixin类
=======================

委托模式，伪代码如下:

.. code-block:: python

    class VoiceMixin:
        def words(self, something):
            print("voice: %s" % something)
            return "voice: %s" % something

    class Dog(VoiceMixin):
        def __init__(self):
            pass

    if __name__ == '__main__':
        dog = Dog()
        dog.words('汪汪汪')

.. note::

    Mixin类应该是单一职责的

抽象模式
===============================

:doc: https://docs.python.org/zh-cn/3/library/abc.html

.. code-block:: python

    from abc import ABCMeta, abstractmethod

    class MyABC(metaclass=ABCMeta):
        @abstractmethod
        def my_abstract_method(self):
            pass

        @classmethod
        @abstractmethod
        def my_abstract_classmethod(cls):
            pass

        @staticmethod
        @abstractmethod
        def my_abstract_staticmethod(self):
            pass

        @property
        @abstractmethod
        def my_abstract_property(self):
            pass

    @my_abstract_property.setter
    @abstractmethod
    def my_abstract_property(self, val):
        pass