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
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
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:
__slots__ = ('label', 'color', 'memory', 'hard_disk')
def __init__(self, label, color, memory):
self.label = label
self.color = color
self.memory = memory
def play_game(self):
print('用%s电脑打游戏' % self.label)
def coding(self):
print('用%s电脑写代码' % self.label)
def watch_video(self):
print('用%s电脑看视频' % self.label)
comp1 = Computer('华为', '银色', '8G')
comp2 = Computer('surface', '黑色', '4G')
comp3 = Computer('IBM', '白色', '8G')
"""打游戏"""
comp1.play_game()
comp2.play_game()
comp3.play_game()
print('================写代码==============')
comp1.coding()
comp2.coding()
comp3.coding()
print('================看视频==============')
comp1.watch_video()
comp2.watch_video()
comp3.watch_video()
print('=============增删改查===============')
print(comp1.label)
print(getattr(comp2, 'color'))
print(getattr( comp3, 'hard_disk', '512Gb'))
comp2.color = '香槟色'
print(comp2.color)
setattr(comp3, 'label', '联想')
print(comp3.label)
# del comp2.color
# print(comp2.color) # AttributeError: color
delattr(comp1, 'memory')
print(comp1.memory) # AttributeError: memory
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 Person:
__slots__ = ('name', 'age', 'dog_owns')
def __init__(self, name, age, dog_owns):
self.name = name
self.age = age
self.dog_owns = dog_owns
def walk_the_dog(self):
print('%s溜%s' % (self.name, self.dog_owns))
p1 = Person('小小明', '18', '大大黄黄')
p1.walk_the_dog() # 小小明溜大大黄黄
class Dog:
__slots__ = ('dog_name', 'color', 'dog_age')
def __init__(self,dog_name, color, dog_age=5):
self.dog_name = dog_name
self.color = color
self.dog_age = dog_age
def bark(self):
print('%s叫唤' % self.dog_name)
d1 = Dog('大大黄黄', '黄色')
d1.bark() # 大大黄黄叫唤
3.声明⼀一个圆类，自己确定有哪些属性和方法
import math
class Circle:
def __init__(self, radius: int, center_location, color='blue'):
self.radius = radius
self.center_location = center_location
self.color = color
def area(self):
print('面积等于', self.radius**2*math.pi)
def perimeter(self):
print('周长等于', self.radius*2*math.pi)
def change_color(self):
self.color = 'yellow'
c1 = Circle(3, (1, 0))
print(c1.color)
c1.area() # 面积等于 28.274333882308138
c1.perimeter() # 周长等于 18.84955592153876
c1.change_color()
print(c1.color) # yellow
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
class Stu:
def __init__(self, name, age, stu_id : str):
self.name = name
self.age = age
self.stu_id = stu_id
def response(self):
print('到!我是%s,今年%d,学号是%s' % (self.name, self.age, self.stu_id))
s1 = Stu('王志峰', 18, '20180010')
s1.response()
class Class:
def __init__(self, class_name, *stu):
self.stu = stu
self.class_name = class_name
self.stus = []
def add(self):
self.stus.append(self.stu)
print(self.stus)
s2 = Class('计算机系1班', '李雨轩')
s3 = Class('计算机系1班', '王子涵')
s2.add()
s3.add()
