面向对象编程三大特性之一----继承

class Father:
    pass

class Mother:
    pass

class Son(Father): #单继承
    pass

class Son(Father, Mother): #多继承(可以不止两个)
    pass

class Father:
    money = 100
    def __init__(self,name, age):
        self.name = name
        self.age = age

    def play_son(self):
        print("%s正在打儿子"%self.name)

class Son(Father):
    pass
f1 = Father("蔡徐坤","30")

print(Son.money)
Son.play_son(f1)

class Father:
    money = 100
    def __init__(self,name, age):
        self.name = name
        self.age = age

    def play_son(self):
        print("%s正在打儿子"%self.name)

class Son(Father):
    money = 10
    def play_son():
        print("测试")
f1 = Father("蔡徐坤","30")

print(Son.money)
Son.play_son()

class Father:
    money = 100
    def __init__(self,name, age):
        self.name = name
        self.age = age

    def play_son(self):
        print("%s正在打儿子"%self.name)

class Son(Father):
    money = 10

f1 = Father("蔡徐坤","30")

print(Son.money)
s1 = Son("自己", "18") #实例化Son的时候会触发继承的父类的init,所以需要传入两个参数
print(s1.name)
print(s1.__dict__)
print(Son.__dict__)

import abc
class All_file(metaclass = abc.ABCMeta):
    @abc.abstractclassmethod
    def read(self):
        pass
    @abc.abstractclassmethod
    def write(self):
        pass

class Disk(All_file):
    def read(self):
        print(‘disk read‘)

    def write(self):
        print(‘disk write‘)

class Cdrom(All_file):
    def read(self):
        print(‘cdrom read‘)
　　#此处少定义一个write函数，所以会报错
c1 = Cdrom()

import abc
class All_file(metaclass = abc.ABCMeta):
    @abc.abstractclassmethod
    def read(self):
        pass
    @abc.abstractclassmethod
    def write(self):
        pass

class Disk(All_file):
    def read(self):
        print(‘disk read‘)

    def write(self):
        print(‘disk write‘)

class Cdrom(All_file):
    def read(self):
        print(‘cdrom read‘)

d1 = Disk()
d1.read()

class A:  #基类
    def test(sslf):
        print(‘A‘)
class B(A):
    def test(self):
        print(‘B‘)
class C(A):
    def test(self):
        print(‘C‘)
class D(C):
    def test(self):
        print(‘D‘)
class E(C):
    def test(self):
        print(‘C‘)

class F(D, E):
    def test(self):
        print(‘F‘)

f1 = F()
f1.test()

print(F.__mro__)