1.聲明?個電腦類：
屬性：品牌抱冷、顏?、內(nèi)存??
?法：打游戲添诉、寫代碼屁桑、看視頻
a.創(chuàng)建電腦類的對象，然后通過對象點的?式獲取栏赴、修改蘑斧、添加和刪除它的屬性
b.通過attr相關?法去獲取、修改艾帐、添加和刪除它的屬性

class Computer:
    """電腦類"""

    def __init__(self, brand='asus', color= 'black', memory='4G'):
        self.brand = brand
        self.color = color
        self.memory = memory

    def play_game(self):
        print('van游戲')

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

    def __str__(self):
        return 'brand:%s color:%s memory:%s' % (self.brand, self.color, self.memory)


if __name__ == '__main__':
    laptop = Computer('asus', 'red_black', '8G')

    setattr(laptop, 'brand', 'acer')
    color = laptop.__getattribute__('color')
    print(color)
    # 添加cpu屬性
    laptop.cpu = 'i7_4720HQ'
    print(laptop)
    print('cpu:', laptop.cpu)
    laptop.__delattr__('color')
    # 檢測color屬性是否被刪除
    print(getattr(laptop, 'color', None))

結果：

red_black
brand:acer color:red_black memory:8G
cpu: i7_4720HQ
None

2.聲明?個?的類和狗的類：
狗的屬性：名字、顏?盆偿、年齡 狗的?法：叫喚
?的屬性：名字柒爸、年齡、狗 ?的?法：遛狗
a.創(chuàng)建?的對象?明事扭，讓他擁有?條狗??捎稚，然后讓?明去遛??

class Human:
    """人的類"""

    def __init__(self, name='', age=0, dog=None):
        self.name = name
        self.age = age
        self.dog = dog

    def walk_a_dog(self, dog):
        print('%s正在遛%s' % (self.name, dog.name))


class Dog:
    """狗的類"""

    def __init__(self, name='', color='yellow', age=0):
        self.name = name
        self.color = color
        self.age = age


    def barking(self):
        print('%s:啊汪！' % self.name)


if __name__ == '__main__':
    dog = Dog('tom', 'blue', 2)
    man = Human('jerry', 18, dog)

    man.walk_a_dog(dog)
    dog.barking()

結果：

jerry正在遛tom
tom:啊汪求橄！

3.聲明?個矩形類：
屬性：?今野、寬 ?法：計算周?和?積
a.創(chuàng)建不同的矩形，并且打印其周?和?積

import random


class Rect:
    """矩形的類"""

    def __init__(self, length=0, width=0):
        self.length = length
        self.width = width

    def perimeter(self):
        perimeter = (self.width + self.length) * 2
        print('周長是：%d' % perimeter)

    def slice(self):
        slice = self.width * self.length
        print('面積是：%d' % slice)


if __name__ == '__main__':
    length = random.randint(1, 10)
    width = random.randint(1, 10)
    rect = Rect(length, width)
    print('長：', length, '寬：', width)

    rect.perimeter()

    rect.slice()

結果：

長： 9 寬： 10
周長是：38
面積是：90

4.創(chuàng)建?個學?類：
屬性：姓名罐农，年齡条霜，學號 ?法：答到，展示學?信息 創(chuàng)建?個班級類：
屬性：學?涵亏，班級名 ?法：添加學?宰睡，刪除學?，點名

class Class:
    """班級的類"""

    def __init__(self, name='', students=[]):
        self.name = name
        self.students = students

    def student_check(self, name):
        print('老師：%s' % name)
        for index in range(len(self.students)):
            if name == self.students[index].name:
                result = self.students[index].say_yes(name)
                if result:
                    print('%s到了' % name)
                    return True
        else:
            print('······')
            print('%s曠課气筋！' % name)
            return False

    def add_student(self):
        name = input('name:')
        age = int(input('age:'))
        id = input('id:')
        # 根據(jù)輸入的信息創(chuàng)建學生對象
        stu = Student(name, age, id)
        # 添加學生
        self.students.append(stu)

    def del_student(self, name):
        for index in range(len(self.students)):
            if name == self.students[index].name:
                del self.students[index]
                print('刪除成功')
                return
        else:
            print('查無此人')
            return


class Student:
    """學生的類"""

    def __init__(self, name='', age=0, id=''):
        self.name = name
        self.age = age
        self.id = id

    def say_yes(self, name):
        if name == self.name:
            print('%s:到' % name)
            return True
        else:
            return False

    def __str__(self):
        return 'name:%s id:%s age:%d' % (self.name, self.id, self.age)


if __name__ == '__main__':
    student = Student('張三', 20, '9526')
    cls1 = Class('py1085')
    cls1.add_student()
    print(cls1.students[0])

    cls1.student_check('張三')
    cls1.student_check('李四')

結果：

name:李四
age:20
id:9527
name:李四 id:9527 age:20
老師：張三
······
張三曠課拆内！
老師：李四
李四:到
李四到了

5.寫?個類，封裝所有和數(shù)學運算相關的功能（包含常?功能和常?值宠默，例如：pi,e等）

class Arithmetic:
    """數(shù)學運算的類"""

   @staticmethod
    def sum(num1, num2):
        return num1 + num2

    @staticmethod
    def subtraction(num1, num2):
        return num1 - num2

    @staticmethod
    def multiplication(num1, num2):
        return num1 * num2

    @staticmethod
    def division(num1, num2):
        return num1/num2


if __name__ == '__main__':
    func = Arithmetic()
    print(func.sum(12, 20))
    print(func.subtraction(20, 12))
    print(func.multiplication(12, 20))
    print(func.division(12, 20))

結果：

32
8
240
0.6

6.1.寫?個班級類麸恍，屬性：班級名、學?搀矫；功能：添加學?抹沪、刪除學?刻肄、根據(jù)姓名查看學?信息，展示班級的所有學?信息

class Class:
    """班級類"""

    def __init__(self, name=''):
        self.class_name = name
        self.students = []

    def add_student(self):
        while True:
            name = input('name(input 0 to back):')
            if name == '0':
                return
            sex = input('sex:')
            age = int(input('age:'))
            # 根據(jù)輸入的信息創(chuàng)建學生對象
            stu = Student(name, sex, age)
            # 添加學生
            self.students.append(stu)

    def find_student(self, name):
        for index in range(len(self.students)):
            if name == self.students[index].name:
                return self.students[index]
        else:
            print('查無此人')
            return

    def del_student(self, name):
        for index in range(len(self.students)):
            if name == self.students[index].name:
                del self.students[index]
                print('刪除成功')
                return
        else:
            print('查無此人')
            return


class Student:
    """學生類"""

    def __init__(self, name='', sex='', age=0):
        self.name = name
        self.sex = sex
        self.age = age

    def __str__(self):
        return 'name:%s sex:%s age:%d' % (self.name, self.sex, self.age)


if __name__ == '__main__':
    cls1 = Class('py1805')

    while True:
        print('''
        ++++++++++++++++++++++++++++
        +      simple system       +
        +       1.add student      +
        +       2.find student     +
        +       3.delete student   +
        +       4.find all         +
        +       0.exit             +
        ++++++++++++++++++++++++++++
        ''')

        cmd = input('>>>>>')
        if not '0' <= cmd <= '4':
            print('輸入有誤')
            continue
        if cmd == '1':
            cls1.add_student()

        if cmd == '2':
            while True:
                name = input('find student by name(input 0 to back):')
                if name == '0':
                    break
                stu = cls1.find_student(name)
                print(stu)

        if cmd == '3':
            while True:
                name = input('delete student by name(input 0 to back):')
                if name == '0':
                    break
                stu = cls1.del_student(name)

        if cmd == '4':
            for index in range(len(cls1.students)):
                print(cls1.students[index])

        if cmd == '0':
            break

結果：

        ++++++++++++++++++++++++++++
        +      simple system       +
        +       1.add student      +
        +       2.find student     +
        +       3.delete student   +
        +       4.find all         +
        +       0.exit             +
        ++++++++++++++++++++++++++++
        
>>>>>1
name(input 0 to back):張三
sex:男
age:20
name(input 0 to back):李四
sex:女
age:21
name(input 0 to back):王五
sex:男
age:23
name(input 0 to back):0

        ++++++++++++++++++++++++++++
        +      simple system       +
        +       1.add student      +
        +       2.find student     +
        +       3.delete student   +
        +       4.find all         +
        +       0.exit             +
        ++++++++++++++++++++++++++++
        
>>>>>2
find student by name(input 0 to back):李四
name:李四 sex:女 age:21
find student by name(input 0 to back):0

        ++++++++++++++++++++++++++++
        +      simple system       +
        +       1.add student      +
        +       2.find student     +
        +       3.delete student   +
        +       4.find all         +
        +       0.exit             +
        ++++++++++++++++++++++++++++
        
>>>>>
輸入有誤

        ++++++++++++++++++++++++++++
        +      simple system       +
        +       1.add student      +
        +       2.find student     +
        +       3.delete student   +
        +       4.find all         +
        +       0.exit             +
        ++++++++++++++++++++++++++++
        
>>>>>4
name:張三 sex:男 age:20
name:李四 sex:女 age:21
name:王五 sex:男 age:23

        ++++++++++++++++++++++++++++
        +      simple system       +
        +       1.add student      +
        +       2.find student     +
        +       3.delete student   +
        +       4.find all         +
        +       0.exit             +
        ++++++++++++++++++++++++++++
        
>>>>>3
delete student by name(input 0 to back):李四
刪除成功
delete student by name(input 0 to back):0

        ++++++++++++++++++++++++++++
        +      simple system       +
        +       1.add student      +
        +       2.find student     +
        +       3.delete student   +
        +       4.find all         +
        +       0.exit             +
        ++++++++++++++++++++++++++++
        
>>>>>4
name:張三 sex:男 age:20
name:王五 sex:男 age:23

      ++++++++++++++++++++++++++++
        +      simple system       +
        +       1.add student      +
        +       2.find student     +
        +       3.delete student   +
        +       4.find all         +
        +       0.exit             +
        ++++++++++++++++++++++++++++
        
>>>>>0

Process finished with exit code 0