派生组合示例

class People:
    def __init__(self,name,age,sex):
        self.name=name
        self.age=age
        self.sex=sex
class Course:
    def __init__(self,name,period,price):
        self.name=name
        self.period=period
        self.price=price
    def tell_info(self):
        print("%s %s %s"%(self.name,self.period,self.price))
class Teacher(People):
    def __init__(self,name,age,sex,job_title):
        super(Teacher,self).__init__(name,age,sex)      #使用父类的__init__:先找到Teacher的父类,再把Teacher 的self（对象）传给父类进行初始化
        self.job_title=job_title
        self.course=[]
        self.students=[]
class Student(People):
    def __init__(self,name,age,sex):
        super(Student,self).__init__(name=name,age=age,sex=sex)
        self.course=[]

wesley=Teacher('wesley',18,'male','nb')
print(wesley.name,wesley.age,wesley.sex,wesley.job_title)
s1=Student('hh',15,'female')
print(s1.name,s1.age,s1.sex)
python=Course('python','3months',3000)
linux=Course('linux','3months',3000)

wesley.course.append(python)     #组合，wesley.course 是python这个对象
wesley.course.append(linux)
s1.course.append(python)
# print(wesley.course)
wesley.students.append(s1)

for obj in wesley.course:  #obj 是python，linux 对象
    obj.tell_info()        #调用对象的方法

wesley 18 male nb
hh 15 female
python 3months 3000
linux 3months 3000