Day|Day 14-task Day14-task

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相关的方法去获取、修改、添加和删除它的属性

class Computer: """说明文档：电脑类""" def __init__(self, brand, color, memory): self.brand = brand self.color = color self.memory = memorydef play_games(self): print('打游戏')def write_code(self): print('写代码')def watch_video(self): print('看视频')computer1 = Computer('T400', '黑色', '1T') print('=========对象.的方式============') # 查 print(computer1.brand) # 改 computer1.color = '灰色' print(computer1.color) # 增 computer1.type = '游戏本' print(computer1.type) # 删 del computer1.type print('=========attr相关的方式============') # 查 print(getattr(computer1, 'brand', '无')) # 改 setattr(computer1, 'memory', '2T') print(computer1.memory) # 增 setattr(computer1, 'type', '游戏本') print(computer1.type) # 删 delattr(computer1, 'type') # print(computer1.type)

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 Dog: """说明文档：狗类""" def __init__(self, name, color, age=0): self.name = name self.color = color self.age = agedef bark(self): print('狗在叫')class Person: def __init__(self, dog, name, age=18): self.name = name self.age = age self.dog = dogdef walk_the_dog(self): print(self.name + '去遛' + self.dog)dog1 = Dog('大黄', '黄色', 2) person1 = Person(dog1.name, '小明') person1.walk_the_dog()

声明?一个圆类，自己确定有哪些属性和方法

import math # 3.声明?一个圆类，自己确定有哪些属性和方法class Circle: """说明文档：圆类""" def __init__(self, radius): self.radius = radiusdef circle_area(self): return self.radius ** 2 * math.pidef circle_perimeter(self): return self.radius * 2 * math.picircle1 = Circle(4) print(circle1.circle_area()) print(circle1.circle_perimeter())

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: """说明文档：学生类""" def __init__(self, name, age, number): self.name = name self.age = age self.number = numberdef answer(self, stu_name): print(stu_name + '回答：' + '到')def show_stu_info(self): print('姓名：%s 年龄：%d 学号：%s' % (self.name, self.age, self.number))class ClassAndGrade: """说明文档：班级类""" def __init__(self, class_name): self.stu_name = [] self.class_name = class_namedef add_stu(self, student): self.stu_name.append(student)def del_stu(self, student_name): if not self.stu_name: print('没有可删除的学生') for item in self.stu_name: if item['name'] == student_name: del item else: print('没有找到该学生')def call_the_roll(self): if not self.stu_name: print('没有学生') for item in self.stu_name: print(item['name'])def avg_age(self): sum1 = 0 for item in self.stu_name: sum1 += item['age'] print(sum1/len(self.stu_name))