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__ = ("brand", "color", "ram", "size", "weight")
def __init__(self, brand, color, ram):
self.brand = brand
self.color = color
self.ram = ram
def game(self):
print("使用%s色的%s品牌电脑玩需要用%s内存才能玩的游戏" % self.color, self.brand, self.ram)
def code(self):
print("使用%s品牌的电脑写代码" % self.brand)
def move(self):
print("使用%s内存的电脑看视频" % self.ram)
stu1 = Computer("hp", "银色", "8G")
# 通过对象点获取
print(stu1.brand)
# 通过对象点方式修改
stu1.brand = "dell"
print(stu1.brand)
stu1.size = "13.3"
print(stu1.size)
# 通过对象点方式删除
del stu1.brand
print(stu1.brand)
# 通过attr方式获取
stu2 = input("请输入获取的属性：")
print(getattr(stu1, "%s" % stu2))
# 通过attr方式修改
setattr(stu1, "color", "黑色")
print(stu1.color)
# 通过attr方式删除
delattr(stu1, "ram")
print(stu1.ram)
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:
def __init__(self, name, age, dog):
self.name = name
self.age = age
self.dog = dog
def walking_the_dog(self):
print("%s在溜一条%s的狗" % (self.name, self.dog.dname))
class Dog:
def __init__(self, dname, dcolor="red", dage="1"):
self.dname = dname
self.dcolor = dcolor
self.dage = dage
def canine(self):
print("%s：汪汪汪" % dog1.dname)
#
#
dog1 = Dog("大黄", "black", "2")
dog = dog1
tur1 = Person("小明", "20", dog1)
tur1.walking_the_dog()
3.声明⼀一个圆类，自己确定有哪些属性和方法
from math import *
class Circle:
def __init__(self, r):
self.r = r
def circumference(self):
print("以%s为半径的圆,周长为%s" % (self.r, self.r ** 2 * pi))
def area(self):
return ("以%s为半径的圆,面积为%s" % (self.r, self.r ** 2 * pi))
r1 = Circle(5)
print(r1.area())
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 Student:
def __init__(self, name, age=0, study_id='000'):
self.name = name
self.age = age
self.study_id = study_id
self.is_in_class = random.randint(0, 1)
def respond(self):
print('%s,到!' % self.name)
def show(self):
print('姓名:%s 年龄:%d 学号:%s' % (self.name, self.age, self.study_id))
class Class:
def __init__(self, name):
self.students = []
self.name = name
def func():
num = 1
while True:
yield 'stu'+str(num)
num += 1
self.create_id = func()
def add_student(self):
name = input('学生姓名:')
age = int(input('学生的年龄:'))
study_id = next(self.create_id)
stu = Student(name, age, study_id)
self.students.append(stu)
def del_student(self):
del_name = input('请输入要删除的学生的名字:')
flag = False
for stu in self.students[:]:
if stu.name == del_name:
flag = True
stu.show()
value = input('是否删除(y/n):')
if value == 'y':
self.students.remove(stu)
if not flag:
print('没有该学生!')
def call_name(self):
for stu in self.students:
print(stu.name)
if stu.is_in_class:
stu.respond()
def avg_age(self):
ages = 0
for stu in self.students:
ages += stu.age
return ages / len(self.students)
def show_all_students(self):
print('=========%s的学生========='%self.name)
for stu in self.students:
stu.show()
c1 = Class('py1904')
c2 = Class('py1905')
c1.add_student() # 001
c1.add_student() # 002
c2.add_student() # 001
c1.add_student() # 003
c1.show_all_students()
c2.show_all_students()