类的组合，继承

组合

class School:
    def __init__(self,name,addr):
        self.name=name
        self.addr=addr


    def zhao_sheng(self):
        print('%s 正在招生' %self.name)

class Course:
    def __init__(self,name,price,period,school):
        self.name=name
        self.price=price
        self.period=period
        self.school=school



s1=School('oldboy','北京')
s2=School('oldboy','南京')
s3=School('oldboy','东京')

# c1=Course('linux',10,'1h','oldboy 北京')
# c1=Course('linux',10,'1h',s1)

msg='''
1 老男孩 北京校区
2 老男孩 南京校区
3 老男孩 东京校区
'''
while True:
    print(msg)
    menu={
        '1':s1,
        '2':s2,
        '3':s3
    }
    choice=input('选择学校>>: ')
    school_obj=menu[choice]
    name=input('课程名>>： ')
    price=input('课程费用>>： ')
    period=input('课程周期>>： ')
    new_course=Course(name,price,period,school_obj)
    print('课程【%s】属于【%s】学校' %(new_course.name,new_course.school.name))

 继承

class Dad:
    '这个是爸爸类'
    money=10
    def __init__(self,name):
        print('爸爸')
        self.name=name
    def hit_son(self):
        print('%s 正在打儿子' %self.name)

class Son(Dad):
    money = 1000000000009
    def __init__(self,name,age):
        self.name=name
        self.age=age

    def hit_son(self):
        print('来自儿子类')
# print(Son.money)
# Son.hit_son()
# print(Dad.__dict__)
# print(Son.__dict__)
s1=Son('alex',18)
s1.hit_son()
# print(s1.money)
# print(Dad.money)
# print(s1.name)
# print(s1.money)
# print(s1.__dict__)
# s1.hit_son()

 

 接口继承

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

    @abc.abstractmethod
    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')

    def write(self):
        print('cdrom write')


class Mem(All_file):
    def read(self):
        print('mem read')

    def write(self):
        print('mem write')
#
m1=Mem()
m1.read()
m1.write()

 继承顺序

#coding:utf-8
class A:
    # def test(self):
    #     print('A')
    pass
class B(A):
    # def test(self):
    #     print('B')

    pass
class C(A):
    # def test(self):
    #     print('C')
    pass

class D(B):
    # def test(self):
    #     print('D')
    pass

class E(C):
    # def test(self):
    #     print('E')
    pass

class F(D,E):
    # def test(self):
    #     print('F')
    pass
f1=F()
f1.test()   #经典类：F->D->B->A-->E-->

# print(F.__mro__)

#F-->D->B-->E--->C--->A新式类