组合

# -*- coding:utf-8 -*-
class People:
    school = "luffycity"

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


class Teacher(People):

    def __init__(self,name,age,sex,level,salary):
        super().__init__(name,age,sex)# 继承People

        self.level = level
        self.salary = salary

    def teach(self):
        print("%s is teaching"%self.name)


class Student(People):

    def __init__(self,name,age,sex,hobby):
        super().__init__(name,age,sex)# 继承People

        self.hobby = hobby

    def learn(self):
        print("%s is learning"%self.name)


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

    def tell_info(self):
        print('%s,价格%s'%(self.name,self.price))

t1 = Teacher("alex",18,"male",10,3000)
s1 = Student('张三',18,'female','games')
# t1.teach()
# s1.learn()
C1 = Course('Python',3300)
C2 = Course('Java',3300)
t1.course = C1
t1.course.tell_info()
s1 = C2
s1.tell_info()