-- coding: utf-8 --
"""
File Name： day12作業(yè)
Author : LPP
E-mail : l.piaopiao@qq.com
date： 2018/7/31
Change Activity:
2018/7/31:
"""
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1.聲明一個電腦類：
屬性：品牌攒磨、顏色、內(nèi)存大小
方法：打游戲爽航、寫代碼、看視頻
class Computer:
def __init__(self, brand='DELL', color='black', memory='4Gb DDR4 2133MHz'):
self.brand = brand
self.color = color
self.memory = memory
def play_games(self):
print('%s玩掃雷一點都不卡'% self.brand)
def writing_codes(self):
print('%s寫代碼必備良品'% self.brand)
def watch_videos(self):
print('%s看西游記后傳是真的卡')
a.創(chuàng)建電腦類的對象，然后通過對象點的方式獲取问裕、修改、添加和刪除它的屬性
b.通過attr相關方法去獲取、修改奶陈、添加和刪除它的屬性
computer = Computer('小米', '黑色')
print('computer.brand:',computer.brand)
print('getattr(computer', getattr(computer, 'brand'))
computer.brand = '宏碁'
setattr(computer, 'brand', '華碩')
print('computer.brand:',computer.brand)
print('getattr(computer, \'brand\')', getattr(computer, 'brand'))
computer.GPU = '1050Ti'
setattr(computer, 'CPU', 'i5-7300HQ')
print('computer.GPU:',computer.GPU)
print('getattr(computer, \'CPU\')', getattr(computer, 'CPU'))
del computer.memory
delattr(computer, 'color')
2.聲明一個人的類和狗的類：
狗的屬性：名字、顏色附较、年齡 狗的方法：叫喚
人的屬性：名字吃粒、年齡、狗 人的方法：遛狗
a.創(chuàng)建人的對象小明拒课，讓他擁有一條狗大黃徐勃，然后讓小明去遛大黃
class Person:
def __init__(self, name='', age=0, pet=None):
self.name = name
self.age = age
self.pet = pet
def walk_the_dog(self):
print('%s溜他的狗 -- %s' % (self.name, self.pet.name))
class Dog:
def __init__(self, name='', age=0, color='黑'):
self.name = name
self.age = age
self.color = color
def bark(self):
print('嗷~ 嗚~~')
dog1 = Dog('大黃', 3)
p1 = Person('小明', 18, dog1)
p1.walk_the_dog()
3.聲明一個矩形類：
屬性：長事示、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 Rectangle:
def __init__(self, width=0, height=0):
self.width = width
self.height = height
def perimeter(self):
print('周長: %.2f' % (2*(self.width+self.height)))
def area(self):
print('面積: %.2f' % (self.width*self.height))
r1 = Rectangle(6, 8)
r1.perimeter()
r1.area()
r2 = Rectangle(4, 6)
r2.perimeter()
r2.area()
4.創(chuàng)建一個學生類：
屬性：姓名僻肖，年齡肖爵，學號 方法：答到，展示學生信息
創(chuàng)建一個班級類：
屬性：學生臀脏，班級名 方法：添加學生遏匆，刪除學生，點名
class Student:
def __init__(self, name='', age=0, id='py1805001'):
self.name = name
self.age = age
self.id = id
def sign_in(self):
print('到!')
def show_info(self):
print('姓名:', self.name)
print('年齡:', self.age)
print('學號:', self.id)
class Class:
def __init__(self, name='py1805', students=[]):
self.name = name
self.students = students
def add_stu(self,student):
self.students.append(student)
def del_stu(self, id):
for stu in self.students:
if id == stu.id:
del stu
def call_the_roll(self):
for stu in self.students:
print(stu.name)
5.寫一個類谁榜，封裝所有和數(shù)學運算相關的功能（包含常用功能和常用值，例如：pi,e等）
class Calculation:
pi = 3.1416926
e = 2.718
# def __init__(self, a=0, b=0):
# self.a = a
# self.b = b
#
def plus(self, a, b):
return a+b
def multi(self, a, b):
return a*b
def divide(self, a, b):
if b:
return '除數(shù)不能為0'
else:
return a/b
def reduce(self, a, b):
return a-b
6.1.寫一個班級類凡纳，屬性：班級名窃植、學生；功能：添加學生荐糜、刪除學生巷怜、根據(jù)姓名查看學生信息，展示班級的所有學生信息
class Class:
def __init__(self, name='py1805', students=[]):
self.name = name
self.students = students
def add_stu(self,student):
self.students.append(student)
def del_stu(self, id):
for stu in self.students:
if id == stu.id:
self.students.remove(stu)
def find_stu(self,name):
for stu in self.students:
if stu.name == name:
print('姓名 學號 年齡\n',stu.name, stu.id, stu.age, sep=' ')
def show_all(self):
for stu in self.students:
print('姓名 學號 年齡\n', stu.name, stu.id, stu.age, sep=' ')
