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￡神魔★判官ぃ 2023-06-02 13:55 6阅读 0赞

### 9.面向对象编程 ###

*  步骤
    
     *  面向对象分析OOA
     *  面向对象设计OOD
     *  面向对象编程OOP
 *  实现
    
     *  1.分析对象特征行为
     *  2.写类描述对象模块
     *  3.实例化，模拟过程
 *  特征
    
     *  封装
        
         *  实例1
            
             *  def search\_book(title):  
                print(‘您要找的书籍名称：\{\}’.format(title))

book=\{  
‘title’:‘python入门’,  
‘price’:80,  
‘authon’:‘Peter’,  
‘search\_book’:search\_book  
\}  
print(book\[‘title’\])  
print(book.get(‘price’),0.0)  
book.get(‘search\_book’)(‘python中级’)

- 实例2
    
    		- import datetime

class Book:  
def **init**(self,  
title,  
price=0.0,  
author=’’,  
publisher=None,  
pudate=datetime.date.today()  
):  
self.title=title,  
self.price=price  
self.author=author,  
self.publisher=publisher,  
self.pudate=pudate

def print_info(self):
        print("当前这本书的信息如下：")
        print("这本书的标题：{}".format(self.title))
        print("这本书的价格：{}".format(self.price))
        print("这本书的作者：{}".format(self.author))
        print("这本书的出版社：{}".format(self.publisher))
        print("这本书的出版日期：{}".format(self.pudate))

book1=Book(‘c\#经典’,30,‘Tom’,‘北京大学出版社’,datetime.date(2019,10,1))  
book1.print\_info()  
book2=Book(‘Flask’)  
book2.price=90  
book2.print\_info()

# print(book1.title,book1.price,sep=’,’) #

- 实例3
    
    		- import datetime

book1=Book(‘c\#经典’,30,‘Tom’,‘北京大学出版社’,datetime.date(2019,10,1))  
book1.print\_info()  
book2=Book(‘Flask’)  
book2.price=90  
book2.print\_info()

# print(book1.title,book1.price,sep=’,’) #

- 属性
    
    		- import datetime

class student:  
def **init**(self,name,birthday):  
self.name=name  
self.birthday=birthday

@property
    def age(self):
        return datetime.date.today().year-self.birthday.year
    
    @age.setter
    def age(self,value):
        raise AttributeError('禁止年龄赋值！')
    
    @age.deleter
    def age(self):
        raise AttributeError('禁止修改年龄！')

if **name**==“**main**”:  
s=student(‘小代’,datetime.date(1994,6,1))  
print(s.name,s.birthday,s.age,sep=’,’)  
del(s.age)

- 继承
    
    	- import datetime

class Employee:  
def **init**(self,name,birthday,department,salary):  
self.name=name  
self.birthday=birthday  
self.department=department  
self.salary=salary

def __repr__(self):
        return '<员工：{}>'.format(self.name)
    
    @property
    def age(self):
        return datetime.date.today().year-self.birthday.year
    
    def give_rise(self,percent,bonus=0.0):
        self.salary=self.salary*(1+percent+bonus)
    
    def working(self):
        print('员工{}在工作......').format(self.name)

class Programer(Employee):  
def **init**(self,name,birthday,department,salary,major,project):  
super().**init**(name,birthday,department,salary)  
self.major=major  
self.project=project

def working(self):
        print('程序员{}正在开发项目{}.....'.format(self.name,self.project))

class Employee:  
def **init**(self,name,birthday,department,salary):  
self.name=name  
self.birthday=birthday  
self.department=department  
self.salary=salary

class HR(Employee):  
def **init**(self,name,birthday,department,salary,qualification\_level):  
Employee.**init**(self,name,birthday,department,salary)  
self.qualification\_level=qualification\_level

def working(self):
        print('人事{}正在招聘新员工......'.format(self.name))

class Programer(Employee):  
def **init**(self,name,birthday,department,salary,major,project):  
super().**init**(name,birthday,department,salary)  
self.major=major  
self.project=project

def working(self):
        print('程序员{}正在开发项目{}.....'.format(self.name,self.project))

if **name**==‘**main**’:  
p=Programer(‘小代’,datetime.date(1994,6,1),‘技术部’,10000,‘python’,‘crm’)  
print§  
print(p.salary)  
p.give\_rise(0.2,0.1)  
print(p.salary)  
p.working()  
print(p.age)  
h=HR(‘建邦’,datetime.date(1993,7,24),‘人事部’,30000,qualification\_level=10)  
print(h)  
print(h.name,h.salary,h.qualification\_level,sep=’//’)

- 多态
    
    	- import datetime

class Employee:  
def **init**(self,name,birthday,department,salary):  
self.name=name  
self.birthday=birthday  
self.department=department  
self.salary=salary

def working(self):
        print('人事{}正在招聘新员工......'.format(self.name))

class Programer(Employee):  
def **init**(self,name,birthday,department,salary,major,project):  
super().**init**(name,birthday,department,salary)  
self.major=major  
self.project=project

def working(self):
        print('程序员{}正在开发项目{}.....'.format(self.name,self.project))

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