- 聲明一個電腦類
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:
'''電腦'''
def __init__(self,brand,color,memory=0):
self.brand = brand
self.color = color
self.memory = memory
def play_game(self):
print('打游戲')
def write_code(self):
print('寫代碼')
def sea_video(self):
print('看視頻')
p1 = Computer('huasuo','white','500g')
p2 = Computer('waixingren','black','888g')
print(p1.brand)
p2.memory = '666g'
print(p2.memory)
p1.price = 10000
print(p1.price)
del p1.price
# print(p1.price)
color1 = getattr(p2,'color','blue')
print(color1)
print(p1.brand)
setattr(p1,'brand','lianxiang')
print(p1.brand)
setattr(p2,'system',7)
print(p2.system)
delattr(p1,'memory')
2.聲明一個人的類和狗的類:
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:
def __init__(self,name,color,age):
self.name = name
self.color = color
self.age = age
def barks(self):
print('叫喚')
class Person:
def __init__(self,name,age,dog：Dog):
self.name = name
self.age = age
self.dog = None
def walk_dog(self):
print('遛狗')
p1 = Person('小明',18,Dog('小黑’,'heise',5)
p1.walk_dog()
3.聲明一個矩形類:
屬性: 長、寬
方法:計算周長和面積
a.創(chuàng)建不同的矩形，并且打印其周長和面積
class Rectangular:
def __init__(self,long = 0,width = 0):
self.long = long
self.width = width
def calculate_perimeter(self,long,width):
perimeter = (int(long)+int(width))*2
return perimeter
def calculate_area(self,long,width):
area = int(long) * int(width)
return area
p1 = Rectangular(8,6)
p2 = Rectangular(12,24)
area1 = p1.calculate_area(p1.long,p1.width)
perimeter1 = p1.calculate_perimeter(p1.long,p1.width) # 求矩形p1的周長和面積
print('p1的周長是%d,面積是%d' % (perimeter1,area1))
area2 = p2.calculate_area(p2.long,p2.width)
perimeter2 = p2.calculate_perimeter(p2.long,p2.width) # 求矩形p2的周長和面積
print('p2的周長是%d,面積是%d' % (perimeter2,area2))
4.創(chuàng)建一個學生類:
屬性:姓名，年齡，學號，成績
方法:答到，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，刪除學生，點名, 獲取班級中所有學生的平均值， 獲取班級中成績最好的學生
class Students:
def __init__(self,name,age,study_id,scors):
self.name = name
self.age = age
self.study_id = study_id
self.scors = scors
def replied(self):
print('答道')
def show_stu_info(self,*p):
for stu in p:
stu_info = stu.__dict__
print(stu_info)
p1 = Students('sea',22,'001',96)
p2 = Students('dragon',21,'002',99)
class Class:
def __init__(self,students = [],class_name = ''):
self.students = students
self.class_name = class_name
def add_student(self,student):
p3.students.append(student)
return p3.students
def del_student(self,student):
p3.students.remove(student)
return p3.students
def call_roll(self,student):
print(student.name)
def average(self,p3):
sum1 = 0
for stu in p3.students:
sum1 += stu.scors
average = sum1/len(p3.students)
return average
def best_scors(self,p):
max1 = max(p3.students,lambda item:item.scors)
return max1
p3 = Class([],'python1807')
student = Students('小強',16,'003',77)
