python 类属性和实例属性、类方法, 静态方法, 实例方法、接口, 协议和抽象基类 (4.2)

# 贴标签不是一个特别好的抽象, 原因他没有一个普适性
class Developer:
    programing_language = None
    busy = True

class Lottery:
    __items = ["mac", "ipad", "iphone"]

print(Lottery._Lottery__items)

class Developer:
    programing_language = None
    busy = True
    __case = "doing something"

d_python = Developer()
d_python.programing_language = "python"
d_java = Developer()
d_java.programing_language = "java"

print(d_java.programing_language)
print(d_python.programing_language)

class Developer:
    programing_language = None
    busy = True
    __case = "doing something"
    def __init__(self, hairs):
        self.__hairs = hairs

    @classmethod
    def __new__(cls, *args, **kwargs):
        print("init class")
        return super().__new__(cls)

    @classmethod
    def get_case(cls):
        return cls.__case

class MyMath:

    @staticmethod
    def add(a, b):
        return a + b

list实现了增删改查的接口, 只要有一个接口没有实现那就不属于list
tuple只提供了查的接口

list扮演者列表的角色, 但同时也是一个序列, 序列并不是一个实体类.

class MyDict(dict):
    def __iadd__(self, other):
        self.update(other)
        return self

    def __str__(self):
        return f"My Dict {self.items()}"

import abc
class Mixin:
    def sign(self):
        pass

    def rank(self):
        pass

class Gamer:
    @abc.abstractmethod
    def sign(self):
        pass


class GoGamer(Mixin, Gamer):
    pass

class Swimmer(Mixin, Gamer):
    pass