课后习题：
学生年龄作业

class Person:
    def __init__(self,name,age):
        self.name=name
        self._age=age
    @property
    def age(self):
        print(self._age)
        if 0<=self._age<=18:
            return '未成年'
        elif 19<=self._age<=35:
            return '青年'
        elif 36<=self._age<=50:
            return '中年'
        elif 51 <= self._age<= 70:
            return '中老年'
        elif 71<=self._age<=150:
            return '老年'
    @age.setter
    def age(self,value):
        if not isinstance(value,int):
            raise ValueError
        if not 0<=value<=150:
            raise ValueError
        self._age=value
p1=Person('jeff',34)
print(p1.age)
p1.age=189
print(p1.age)

day14作业
1..定义一个学生类。有属性：姓名、年龄、成绩（语文，数学，英语)[每课成绩的类型为整数]
方法： a. 获取学生的姓名：getname() b. 获取学生的年龄：getage()
c. 返回3门科目中最高的分数。get_course()

import random
class Student:
    def __init__(self,name,age,scores=[]):
        self.name=name
        self.age=age
        self._scores=scores
    @property
    def scores(self,value):
        if not isinstance(value,int):
            raise ValueError
        if not 0<=len(self._scores)<=2:
            raise ValueError
        language_score=self._scores[0]
        maths_score=self._scores[1]
        englsih_score=self._scores[2]
        value=[language_score,maths_score,englsih_score]
        self._scores=value
    def get_name(self):
        return print(self.name)
    def get_age(self):
        return print(self.age)
    def get_course(self):
        language_score = self._scores[0]
        maths_score = self._scores[1]
        englsih_score = self._scores[2]
        self._scores = [language_score, maths_score, englsih_score]
        print(max(self._scores))
stu1=Student('sara',21,[34,54,64])
stu2=Student('ann',21,[78,67,89])
stu1.get_age()
stu1.get_name()
stu1.get_course()
stu2.get_course()

第五题写歌词不会