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
class Computer:
def __init__(self, brand='', color='', ram=''):
self.brand = brand
self.color = color
self.ram = ram
def coding(self):
print('coding~~~')
def wvideo(self):
print('watching')
# 对象点
c1 = Computer('dell', 'grey', '16')
# 查
print(c1.brand)
# 修改
c1.color = 'pink'
print(c1.color)
# 添加
c1.price = '15000'
print(c1.price)
# 删除
print(c1.ram)
del c1.ram
print(c1.ram)
b.通过attr相关⽅方法去获取、修改、添加和删除它的属性
# 查
getattr(c1, 'brand')
print(c1.brand)
# 修改
setattr(c1, 'color', 'pink')
print(c1.color)
# 添加
setattr(c1, 'price', '15000')
print(c1.price)
#删除
delattr(c1, 'ram')
# print(c1.ram)
2.声明⼀个人的类和狗的类:
狗的属性:名字、颜色、年龄
狗的方法:叫唤
人的属性:名字、年年龄、狗
人的方法:遛狗
a.创建⼈人的对象小明，让他拥有⼀一条狗大黄，然后让小明去遛大黄
class Dog:
def __init__(self, name='', color='', age=''):
self.name = name
self.color = color
self.age = age
def bark(self):
print('嗷呜~~~')
d1 = Dog(name='大黄')
class People:
def __init__(self, name='', age='', pet=''):
self.name = name
self.age = age
self.pet = pet
def walk_dog(self):
print('%s溜%s' % (p1.name, p1.pet))
p1 = People(name='小明', pet='大黄')
p1.walk_dog()
3.声明⼀一个圆类，自己确定有哪些属性和方法
pi = 3.1415926
class Circle:
def __init__(self, radius = 0):
self.radius = radius
def area(self):
print(pi * self.radius ** 2)
def perimeter(self):
print(2*pi*self.radius)
c1 = Circle(5)
c1.area()
c1.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
import random
class Student:
def __init__(self, name, age=0, num='0001'):
self.name = name
self.age = age
self.num = num
self.state = random.randint(0, 1) # 是否在教室的状态， 0 -> 不在, 1 -> 在
def amount(self):
print('%s 到!' % self.name)
def show(self):
print('姓名:%s 年龄:%d 学号:%s' % (self.name, self.age, self.num))
class Class:
def __init__(self, name):
self.students = [
Student('stu1', 19, '001'),
Student('stu2', 20, '002'),
Student('stu3', 23, '003'),
Student('stu1', 19, '004'),
Student('stu4', 30, '005'),
]
self.name = name
# 学号生成器
self.__nums = ('stu'+str(num).zfill(3) for num in range(50))
# 添加学⽣生
def add_student(self):
# 输入学生信息
stu_name = input('姓名:')
stu_age = int(input('年龄:'))
stu_num = next(self.__nums)
# 创建学生对象
stu = Student(stu_name, stu_age, stu_num)
# 将学生添加到班级中
self.students.append(stu)
# 删除学生
def del_student(self):
del_name = input('删除学生的姓名:')
for stu in self.students[:]:
if stu.name == del_name:
self.students.remove(stu)
# 点名
def call_the_roll(self):
for stu in self.students:
# 喊名字
print(stu.name)
# 如果在教室
if stu.state:
# 答到
stu.amount()
else:
print('....')
def average_age(self):
sum1 = 0
for stu in self.students:
sum1 += stu.age
average = sum1//len(self.students)
print('平均年龄: %d' % average)
return average
def cl_show(self):
for stu in self.students:
stu.show()
class1 = Class('py1902')
print('=========添加学生===========')
# for _ in range(5):
class1.add_student()
class1.cl_show()
print('=========删除学生===========')
class1.del_student()
class1.cl_show()
print('=========点名===========')
class1.call_the_roll()
class1.average_age()