聲明一個(gè)電腦類
屬性：品牌、顏色、內(nèi)存大小
方法：打游戲、寫代碼、看視頻
a.創(chuàng)建電腦類的對象，然后通過對象點(diǎn)的方式獲取、修改、添加和刪除它的屬性
b.通過attr相關(guān)方法去獲取、修改、添加和刪除它的屬性
class Computer:
"""創(chuàng)建一個(gè)電腦類"""
__slots__ = ('brand', 'color', 'rom', 'cpu', 'gpu', 'size', 'prize', 'heavy')
def __init__(self, brand, color, rom):
self.brand = brand
self.color = color
self.rom = rom
def play_game(self):
print('打游戲！')
def coding(self):
print('寫代碼！')
def watch_video(self):
print('看視頻！')
ge60 = Computer('微星', 'black', '8GB')
ge60.brand = 'Alien'
print(ge60.brand) # Alien
my_rom = ge60.rom
print(my_rom) # 8GB
ge60.gpu = 'GTX760m'
print(ge60.gpu) # GTX760m
del ge60.gpu
# print(ge60.gpu) # AttributeError: gpu
# 查找
my_brand = getattr(ge60, 'brand')
print(my_brand) # Alien
my_color = ge60.__getattribute__('color')
print(my_color) # black
my_cpu = getattr(ge60, 'cpu', '該屬性不存在')
print(my_cpu) # 該屬性不存在
# 添加
setattr(ge60, 'cpu', 'i5')
print(getattr(ge60, 'cpu')) # i5
ge60.__setattr__('gpu', '1080Ti')
print(ge60.__getattribute__('gpu')) # 1080Ti
# 修改
setattr(ge60, 'cpu', 'i7')
print(getattr(ge60, 'cpu')) # i7
ge60.__setattr__('gpu', '1060Ti')
print(ge60.__getattribute__('gpu')) # 1060Ti
# 刪除
delattr(ge60, 'cpu')
print(getattr(ge60, 'cpu', '該屬性不存在')) # 該屬性不存在
ge60.__delattr__('gpu')
print(getattr(ge60, 'gpu', '該屬性不存在')) # 該屬性不存在
2.聲明一個(gè)人的類和狗的類:
狗的屬性:名字、顏色、年齡
狗的 法:叫喚
人的屬性:名字、 年齡、狗
人的方法:遛狗
a.創(chuàng)建人的對象名字叫小明，讓他擁有一條狗 ，然后讓小明去遛狗
class Dog:
"""創(chuàng)建一個(gè)狗的類"""
def __init__(self, name, color, age):
self.name = name
self.color = color
self.age = age
def bark(self):
print('汪汪汪！')
class Person:
"""人"""
def __init__(self, name, age, dog):
self.name = name
self.age = age
self.dog = dog
def walk_dog(self):
print('上街溜%s' % self.dog.name)
dog1 = Dog('旺財(cái)', '黃色', 2)
person1 = Person('小明', 18, dog1)
person1.walk_dog() # 上街溜旺財(cái)
dog1.bark() # 汪汪汪！
3.聲明一個(gè)矩形類:
屬性: 長、寬
方法:計(jì)算周長和面積
a.創(chuàng)建不同的矩形，并且打印其周長和面積
class Rectangle:
"""矩形"""
def __init__(self, length=1, width=1):
self.length = length
self.width = width
# 計(jì)算周長
def get_perimeter(self):
self.perimeter = 2 * self.length + 2 * self.width
print(self.perimeter)
return self.perimeter
# 計(jì)算面積
def get_area(self):
self.area = self.length * self.width
print(self.area)
return self.area
rectangle1 = Rectangle(width=10)
rectangle2 = Rectangle(5)
rectangle3 = Rectangle(2, width=20)
rectangle1.get_perimeter() # 22
rectangle1.get_area() # 10
rectangle2.get_perimeter() # 12
rectangle2.get_area() # 5
rectangle3.get_perimeter() # 44
rectangle3.get_area() # 40
4.創(chuàng)建一個(gè)學(xué)生類:
屬性:姓名，年齡，學(xué)號(hào)，成績
方法:答到，展示學(xué)生信息
創(chuàng)建一個(gè)班級(jí)類: 屬性:學(xué)生，班級(jí)名
方法:添加學(xué)生，刪除學(xué)生，點(diǎn)名, 獲取班級(jí)中所有學(xué)生的平均值， 獲取班級(jí)中成績最好的學(xué)生
class Student:
"""學(xué)生"""
def __init__(self, name, age, stu_id, score):
self.name = name
self.age = age
self.stu_id = stu_id
self.score = score
def check_in(self):
print('%s到！' % self.name)
def show_info(self):
print('姓名：%s, 年齡：%s, 學(xué)號(hào)：%s, 成績：%s'\
% (self.name, self.age, self.stu_id, self.score))
class Class:
"""班級(jí)"""
# 創(chuàng)建班級(jí)屬性，學(xué)生用不定長參數(shù)方式創(chuàng)建，并且為Student類的對象
def __init__(self, class_name, *students):
self.class_name = class_name
self.students = list(students)
def add_stu(self, student):
self.students.append(student)
def del_stu(self, student):
self.students.remove(student)
def check_name(self):
for stu in self.students:
print(stu.name + '!')
stu.check_in()
def get_average_score(self):
sum1 = 0
for stu in self.students:
sum1 += stu.score
avg = sum1/len(self.students)
print(avg)
return avg
def get_best_score_stu(self):
best_score_stu = max(self.students, key=lambda item: item.score)
best_score_stu.show_info()
return best_score_stu
stu1 = Student('小明', 20, 'stu001', 90)
stu2 = Student('小花', 18, 'stu002', 88)
stu3 = Student('小張', 22, 'stu003', 95)
stu4 = Student('小李', 21, 'stu004', 87)
class1 = Class('py1807', stu1, stu2, stu3)
class1.check_name()
class1.get_average_score()
class1.get_best_score_stu()
class1.add_stu(stu4)
class1.del_stu(stu3)
class1.check_name()
class1.get_average_score()
class1.get_best_score_stu()
