Day13-homework

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

class computer:
    def __init__(self, brand, color, memory):
        self.brand = brand
        self.color = color
        self.memory = memory

    def play_game(self):
        return self.memory + '的电脑用来打游戏很流畅'

    def write_code(self):
        return self.brand + '牌的电脑可以用来写代码'

    def watch_film(self):
        return self.color + '的电脑晚上可以营造看鬼片的氛围'


computer1 = computer('华为', '黑色', '内存大')
print(computer1.play_game())
print(computer1.write_code())
print(computer1.watch_film())

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
获取

print(computer1.memory)

修改

computer1.memory = '内存小'
print(computer1.memory)

添加

computer1.shape = '笔记本'
print(computer1.shape)

删除

del computer1.shape
# print(computer1.shape)     #AttributeError: 'computer' object has no attribute 'shape'

b.通过attr相关⽅方法去获取、修改、添加和删除它的属性
获取

print(getattr(computer1,'color'))

修改

setattr(computer1, 'memory', 'xiao')
print(computer1.memory)

添加

setattr(computer1, 'shape', '笔记本')
print(computer1.shape)

删除

delattr(computer1, 'shape')
# print(computer1.shape)  #AttributeError: 'computer' object has no attribute 'shape'

2.声明⼀个人的类和狗的类:
狗的属性:名字、颜色、年龄
狗的⽅方法:叫唤
人的属性:名字、年年龄、狗
人的⽅方法:遛狗

class Dogs:
    def __init__(self, name, color, age):
        self.name = name
        self.color = color
        self.age = age
    def cry_out(self):
        return self.age + self.color + '的' + self.name + '叫唤着，像是在叫'
class Peoples:
    def __init__(self, name, age):
        self.name = name
        self.age = age
    def stroll(self):
        return self.name + '带他出去溜溜弯儿'

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

people = Peoples('小明',18)
dog = Dogs('大黄', '黄色', '年轻的')
print(dog.cry_out() + people.stroll())

3.声明⼀一个圆类，自己确定有哪些属性和方法

class Roundness:
    def __init__(self,radius):
        self.radius = radius
    def area(self):
        return self.radius * self.radius * 3.14


r = int(input('请输入圆的半径：'))
roundness = Roundness(r)
print('圆的面积为：',roundness.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 Students:
    def __init__(self,name,age,num):
        self.name = name
        self.age = age
        self.num = num

    def respond(self):
        return self.name + '站起来说:“我叫' + self.name + ' 今年' + self.age + '岁,' + '我的学号是' + self.num + '"。'


student = Students('小米', '13', '2019303234')
print(student.respond())

class Classes:
    def __init__(self, class_name1, students1):
        self.class_name = class_name1
        self.students = students1

    def add_student(self, name, age):
        self.students.setdefault(name, age)
        return students

    def del_student(self, name):
        del self.students[name]
        return students

    def aver_age(self, studentss):
        self.student = studentss
        sum = 0
        count = 0
        for key in studentss:
            sum += studentss[key]
            count += 1
        return sum / count


students = {'詹三': 12, '李四': 34, '吴广': 23}
class1 = Classes('一班', students)
print(class1.add_student('喜洋洋', 24))
print(class1.del_student('喜洋洋'))
print(class1.aver_age(students))