day14-作業(yè)

1. 聲明?個電腦類: 屬性:品牌、顏色峦椰、內(nèi)存大小 方法:打游戲龄寞、寫代碼、看視頻汤功，a.創(chuàng)建電腦類的對象物邑，然后通過對象點的方式獲取、修改冤竹、添加和刪除它的屬性拂封，b.通過attr相關方法去獲取、修改鹦蠕、添加和刪除它的屬性

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

    def games(self):
        return '%s適合打游戲' % self.brand

    def code(self):
        return '%s適合寫代碼' % self.brand

    def video(self):
        return '%s適合看視頻' % self.brand


# a.
computer1 = Computer('神舟', '黑色', '32G')
# 獲取
print(computer1.brand)
# 修改
computer1.color = '白色'
print(computer1.color)
# 添加
computer1.price = 7000
print(computer1.price)
# 刪除
del computer1.memory

# b.
computer2 = Computer('蘋果', '白色', '256G')
# 獲取
print(getattr(computer2, 'brand'))
# 修改
setattr(computer2, 'color', '黑色')
print(computer2.color)
# 添加
setattr(computer2, 'price', 8900)
print(computer2.price)
# 刪除
delattr(computer2, 'memory')

2. 聲明一個人的類和狗的類:狗的屬性:名字冒签、顏色、年齡;狗的方法:叫喚;人的屬性:名字钟病、年齡萧恕、狗;人的方法:遛狗;a.創(chuàng)建人的對象小明，讓他擁有一條狗大黃肠阱，然后讓小明去遛大黃

class Dog:
    def __init__(self, name, color, age):
        self.name = name
        self.color = color
        self.age = age

    def shout(self):
        return '%s在叫你' % self.name


class Person:
    def __init__(self, name, age, dog):
        self.name = name
        self.age = age
        self.dog = Dog(dog.name, dog.color, dog.age)

    def walk_dog(self):
        return '%s遛%s' % (self.name, self.dog.name)


p1 = Person('小明', 22, Dog('大黃', '黃色', 22))
print(p1.walk_dog())

3. 聲明一個圓類票唆，自己確定有哪些屬性和方法

class Circle:
    pai = 3.14

    def __init__(self, rad):
        self.radius = rad

    # 計算圓的面積
    def area(self):
        return '面積：%.2f' % (self.pai * self.radius ** 2)

    # 計算圓的周長
    def girth(self):
        return '周長：%.2f' % (2 * self.radius * self.pai)


c1 = Circle(10)
print(c1.girth())
print(c1.area())

4. 創(chuàng)建一個學生類:屬性:姓名，年齡屹徘，學號;方法:答到走趋，展示學生信息;創(chuàng)建一個班級類:屬性:學生，班級名;方法:添加學生噪伊，刪除學生簿煌，點名, 求班上學生的平均年齡

class Students:
    count = 0

    def __init__(self, name, age):
        self.count += 1
        self.name = name
        self.age = age
        self.study_id = 'stu' + str(self.count).zfill(3)

    # 答到
    @staticmethod
    def answer(name):
        return '%s到' % name

    # 展示學生信息
    def stu_print(self):
        return '<name:%s,age:%d,study_id:%s>' % \
               (self.name, self.age, self.study_id)


class Classes:
    classes = []

    def __init__(self, stu, name):
        # self.students = Students(stu.name, stu.age)
        self.student = {'name': stu.name, 'age': stu.age, 'study_id': stu.study_id}
        self.name = name
        self.classes.append(self.student)

    # 添加學生
    def add_stu(self, stu):
        self.student = {'name': stu.name, 'age': stu.age, 'study_id': stu.study_id}
        self.classes.append(self.student)

    # 刪除學生
    def del_stu(self, name):
        for stu in self.classes:
            if name == stu['name']:
                self.student = stu
                self.classes.remove(self.student)
                break
        else:
            print('沒有該學生')

    # 點名
    def call_name(self, name):
        for stu1 in self.classes:
            print('========', stu1)
            if name == stu1['name']:
                # self.student = name
                return Students.answer(name)

        else:
            return '沒有該學生'

    # 求平均年齡
    def avg_age(self):
        sum1 = 0
        count = 0
        for stu in self.classes:
            sum1 += stu['age']
            count += 1
        return int(sum1 / count)


# 創(chuàng)建班級對象
class1 = Classes(Students('小明', 22), 'python')
# 添加學生
class1.add_stu(Students('小花', 18))
print(class1.classes)
# 求平均年齡
print(class1.avg_age())
# 刪除學生
class1.del_stu('小花')
print(class1.classes)
# 點名
print(class1.call_name('小明'))
# print(class1.student.stu_print())