1.聲明一個電腦類: 屬性:品牌期犬、顏色颜懊、內存大小 方法:打游戲财岔、寫代碼、看視頻

a.創(chuàng)建電腦類的對象河爹，然后通過對象點的方式獲取匠璧、修改、添加和刪除它的屬性

b.通過attr相關方法去獲取咸这、修改夷恍、添加和刪除它的屬性

class Computer(object):
    def __init__(self,brand,color,memory):
        self.brand = brand
        self.color = color
        self.memory = memory
    def play_game(self):
        print('玩游戲')

    def write_code(self):
        print('寫代碼')

    def look_video(self):
        print('看視頻')

# a.創(chuàng)建電腦類的對象，然后通過對象點的方式獲取媳维、修改酿雪、添加和刪除它的屬性

#a創(chuàng)建和獲取
computer1 = Computer('蘋果', '白色', '8GB')
print(computer1.memory)
#a修改
computer1.memory = '16GB'
print(computer1.memory)
#a添加
computer1.size = '14inch'
print(computer1.size)
#a刪除
del computer1.color
# print(computer1.color)  AttributeError

# b.通過attr相關的方法去獲取、修改侄刽、添加和刪除它的屬性
#b創(chuàng)建和獲取
computer2 = Computer('聯(lián)想', '黑色', '4GB')
print(getattr(computer2, 'color'))
#b修改
setattr(computer2, 'brand', '華碩')
print(computer2.brand)
#b添加
setattr(computer2, 'size', '17')
print(computer2.size)
#b刪除
delattr(computer2, 'color')
# print(computer2.color) # TypeError

2.聲明一個人的類和狗的類:

狗的屬性:名字指黎、顏色、年齡
狗的方法:叫喚
人的屬性:名字州丹、年齡醋安、狗
人的?方法:遛狗

a.創(chuàng)建人的對象小明杂彭，讓他擁有一條狗大黃，然后讓小明去遛大黃

class Dogs(object):
    def __init__(self, name, color):
        self.name = name
        self.color = color
        self.age = 0
    def dog_call(self):
        print('汪汪汪吓揪！')


dog1 = Dogs('旺財', '白色')

class Persons(object):
    def __init__(self, name, age, dog):
        self.name = name
        self.age = age
        self.dog = dog
    def person_way(self):
        return print('%s遛%s' % (self.name, self.dog))


person1 = Persons('小明', 18, dog1.name)
person1.person_way()

3.聲明一個圓類:

class Circle(object):
    pi = 3.1415926
    def __init__(self, r, x, y):
        self.r = r
        self.x = x
        self.y = y
    def get_d(self):
        return 2*self.r
    def get_area(self):
        return Circle.pi*self.r**2
    def circle_x(self):
        return abs(self.y - self.r)
    def circle_y(self):
        return abs(self.x - self.r)


circle1 = Circle(5, 10, 20)
print(circle1.get_d(), circle1.get_area(), circle1.circle_y(), circle1.circle

4.創(chuàng)建一個學生類:

屬性:姓名亲怠，年齡，學號
方法:答到柠辞，展示學生信息

創(chuàng)建一個班級類:
屬性:學生团秽，班級名
方法:添加學生，刪除學生钾腺，點名, 求班上學生的平均年齡

class Student(object):
    def __init__(self, name, age, student_id):
        self.name = name
        self.age = age
        self.student_id = student_id
    def response(self):
        print('%s到' % self.name)
    def show_message(self):
        print("""展示%s信息:
         姓名：%s
         年齡：%d
         學號：%d
        """ %(self.name,self.name, self.age, self.student_id))
# 創(chuàng)建一個班級類:
# 屬性:學生徙垫，班級名
# 方法:添加學生，刪除學生放棒，點名, 求班上學生的平均年齡
class Class(object):
    def __init__(self, student, age, class_number):
        self.student = student
        self.class_number = class_number
        self.age = age
    def add_student(self):
        student_list.append(self.student)
        return student_list
    def del_student(self):
        student_list.remove(self.student)
        return student_list
    def call_name(self):
        print('呼叫%s' % self.student)
    def student_aver(self, age, n):
        return age / n


n = 0
ages = 0
student_list = []
while 1:
    name = input('請輸入學生的姓名：')
    age = int(input('請輸入學生的年齡：'))
    student_id = int(input('請輸入學生的學號：'))
    student1 = Student(name, age, student_id)
    print(student1.age)
    student1.response()
    student1.show_message()
    n += 1
    class1 = Class(student1.name, student1.age, 'py1808')
    class1.add_student()
    print(student_list)
    class1.call_name()
    print(n)
    ages += student1.age
    print(class1.student_aver(ages,n))
    continue_number = input('請輸入（1-3):')
    if continue_number == '1':
        continue
    elif continue_number == '2':
        class1.del_student()
    else:
        break