组合

组合

 

什么是组合？

　　

　　1.继承：满足什么是什么的关系，is-a的关系

　　2.组合：就是一个对象拥有一个属性，该属性的值是另外一个对象

　　解决类与类之间的代码冗余问题

class People():
    school = 'SH'

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


class Admin(People):
   pass


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


python = Course('python', '6mon', 10000)
linux = Course('linux', '5mon', 20000)


class Student(People, Course):
    def __init__(self, name, age, gender, course=None):
        if course is None:
            course = []
        self.courses = course
        super().__init__(name, age, gender, )

    def choose_course(self, stu_obj, course):
        stu_obj.courses.append(course)

 

 

 

 

END