Day13-基操作业

1.声明⼀个电脑类: 属性:品牌、颜⾊、内存⼤小 方法:打游戏、写代码、看视频

class Computer:
    def __init__(self,brand,color,memsize):
        self.brand = brand
        self.color = color
        self.memsize = memsize
    def PlayGame(self):
        return '打游戏'
p1 = Computer('联想','蓝色','8G')
print(p1.PlayGame())

a.创建电脑类的对象，然后通过对象点的⽅方式获取、修改、添加和删除它的属性

class Computer:
    def __init__(self,brand,color,memsize):
        self.brand = brand
        self.color = color
        self.memsize = memsize
p1 = Computer('联想','蓝色','8G')
print(p1.brand)
print(p1.color)
print(p1.memsize)
p1.brand = '神舟'
print(p1.brand)
p1.size = 15.6
print(p1.size)
del p1.size
print(p1.size)    #AttributeError: 'Computer' object has no attribute 'size'

b.通过attr相关⽅方法去获取、修改、添加和删除它的属性

class Computer:
    def __init__(self,brand,color,memsize):
        self.brand = brand
        self.color = color
        self.memsize = memsize
p1 = Computer('联想','蓝色','8G')
print(getattr(p1,'brand'))
print(getattr(p1,'color'))
setattr(p1,'color','红色')
print(getattr(p1,'color'))
setattr(p1,'size',15.6)
print(getattr(p1,'size'))
delattr(p1,'size')
getattr(p1,'size')     #AttributeError: 'Computer' object has no attribute 'size'

2.声明⼀个人的类和狗的类:

狗的属性:名字、颜⾊色、年年龄

狗的⽅方法:叫唤

人的属性:名字、年年龄、狗

人的⽅方法:遛狗

a.创建⼈人的对象⼩小明，让他拥有⼀一条狗⼤大⻩黄，然后让⼩小明去遛⼤大⻩黄

class Dog:
    def __init__(self,name,color,age):
        self.name = name
        self.color = color
        self.age = age
    def jiaohuan(self):
        return '汪汪汪'
p1 = Dog('大大黄黄','黄色',1)
# p2 = Person('小小明',)
class Person:
    def __init__(self,name,age,dog):
        self.name = name
        self.age = age
        self.dog = dog
    def fangfa(self):
        return ('%s遛%s'% (self.name,self.dog))
p2 = Person('小小明',18,p1.name)
print(p2.fangfa())

3.声明⼀一个圆类:

import math
class Garden:
    def __init__(self,r):
        self.r = r
    def area(self):
        return (math.pi) * self.r ** 2  
    def perimeter(self):
        return (math.pi) * self.r * 2
p1 = Garden(3)
print(p1.area())
print(p1.perimeter())

4.创建⼀一个学⽣生类:

属性:姓名，年龄，学号

方法:答到，展示学⽣生信息

创建⼀一个班级类:

属性:学⽣生，班级名

方法:添加学⽣生，删除学生，点名, 求班上学生的平均年龄