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 Comps:
def __init__(self, brand, color='black'):
self.brand = brand
self.color = color
self.ram = 4
@staticmethod
def func1():
print('打游戏','写代码','看视频')
# a.
com1 = Comps('apple')
print(com1.brand)
com1.color = 'white'
print(com1.color)
com1.ram = '8GB'
print(com1.ram)
del com1.brand
# print(com1.brand)
# b.
com2 = Comps('Huawei', color='white')
print(getattr(com2, 'brand')) # 获取
setattr(com2, 'color', 'gold') # 修改
print(com2.color)
setattr(com2, 'price', 8000) # 添加
print(com2.price)
delattr(com2, 'ram') # 删除
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、年龄、狗
人的方法:遛狗
a.创建人的对象小明，让他拥有一条狗大黄，然后让小明去遛大黄
class Dogs:
def __init__(self, name1, color='yellow', age1=2):
self.name1 = name1
self.color = color
self.age1 = age1
def bark(self):
print('%s在嗷嗷叫!' % self.name1)
class Person:
def __init__(self, name, age, dog=None):
self.name = name
self.age = age
self.dog = dog
def walk_dog(self):
if self.dog:
print('%s牵着%s在散步' %(self.name, self.dog.name1))
else:
print('没有狗!溜自己~')
p1 = Person('小明', 18)
dog1 = Dogs('大黄')
p1.dog = dog1
p1.walk_dog()
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, x=0, y=0):
self.radius = radius
self.center_x = x
self.center_y = y
def area(self):
return math.pi * self.radius * self.radius
def perimeter(self):
return 2 * math.pi * self.radius
c1 = Circle(3)
print(c1.area(), c1.perimeter())
4.创建一个学生类:
属性:姓名，年龄，学号
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, 求班上学生的平均年龄
class Student:
def __init__(self, name, age=0, num='0001'):
self.name = name
self.age = age
self.num = num
self.state = 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 = []
self.name = name
# 学号生成器
self.nums =('stu'+str(num).zfill(3) for num in range(50))
# 添加学生
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)
def call_the_roll(self):
for stu in self.students:
print(stu.name)
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()
