- 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式获取、修改、添加和删除它的属性
b.通过attr相关方法去获取、修改、添加和删除它的属性
class Computer:
'''电脑'''
def __init__(self,brand,color,memory=0):
self.brand = brand
self.color = color
self.memory = memory
def play_game(self):
print('打游戏')
def write_code(self):
print('写代码')
def sea_video(self):
print('看视频')
p1 = Computer('huasuo','white','500g')
p2 = Computer('waixingren','black','888g')
print(p1.brand)
p2.memory = '666g'
print(p2.memory)
p1.price = 10000
print(p1.price)
del p1.price
# print(p1.price)
color1 = getattr(p2,'color','blue')
print(color1)
print(p1.brand)
setattr(p1,'brand','lianxiang')
print(p1.brand)
setattr(p2,'system',7)
print(p2.system)
delattr(p1,'memory')
2.声明一个人的类和狗的类:
狗的属性:名字、颜色、年龄
狗的 法:叫唤
人的属性:名字、 年龄、狗
人的方法:遛狗
a.创建人的对象名字叫小明，让他拥有一条狗 ，然后让小明去遛狗
class Dog:
def __init__(self,name,color,age):
self.name = name
self.color = color
self.age = age
def barks(self):
print('叫唤')
class Person:
def __init__(self,name,age,dog：Dog):
self.name = name
self.age = age
self.dog = None
def walk_dog(self):
print('遛狗')
p1 = Person('小明',18,Dog('小黑’,'heise',5)
p1.walk_dog()
3.声明一个矩形类:
属性: 长、宽
方法:计算周长和面积
a.创建不同的矩形，并且打印其周长和面积
class Rectangular:
def __init__(self,long = 0,width = 0):
self.long = long
self.width = width
def calculate_perimeter(self,long,width):
perimeter = (int(long)+int(width))*2
return perimeter
def calculate_area(self,long,width):
area = int(long) * int(width)
return area
p1 = Rectangular(8,6)
p2 = Rectangular(12,24)
area1 = p1.calculate_area(p1.long,p1.width)
perimeter1 = p1.calculate_perimeter(p1.long,p1.width) # 求矩形p1的周长和面积
print('p1的周长是%d,面积是%d' % (perimeter1,area1))
area2 = p2.calculate_area(p2.long,p2.width)
perimeter2 = p2.calculate_perimeter(p2.long,p2.width) # 求矩形p2的周长和面积
print('p2的周长是%d,面积是%d' % (perimeter2,area2))
4.创建一个学生类:
属性:姓名，年龄，学号，成绩
方法:答到，展示学生信息
创建一个班级类: 属性:学生，班级名
方法:添加学生，删除学生，点名, 获取班级中所有学生的平均值， 获取班级中成绩最好的学生
class Students:
def __init__(self,name,age,study_id,scors):
self.name = name
self.age = age
self.study_id = study_id
self.scors = scors
def replied(self):
print('答道')
def show_stu_info(self,*p):
for stu in p:
stu_info = stu.__dict__
print(stu_info)
p1 = Students('sea',22,'001',96)
p2 = Students('dragon',21,'002',99)
class Class:
def __init__(self,students = [],class_name = ''):
self.students = students
self.class_name = class_name
def add_student(self,student):
p3.students.append(student)
return p3.students
def del_student(self,student):
p3.students.remove(student)
return p3.students
def call_roll(self,student):
print(student.name)
def average(self,p3):
sum1 = 0
for stu in p3.students:
sum1 += stu.scors
average = sum1/len(p3.students)
return average
def best_scors(self,p):
max1 = max(p3.students,lambda item:item.scors)
return max1
p3 = Class([],'python1807')
student = Students('小强',16,'003',77)
