オブジェクト(OPP)向けの三大特徴の継承

OPP(         )     :
    1.  
    2.  
    3.  

 .  
    1.  :            
           a  b           
            OPP                
    2.     :        ,            
            ,          ,           
            ,   a    b,  a       b     (  )   (  ).
        : a  b,a     (   ),b     (  )

          ：                     
                                           


  
class Tecahter:
    school = 'oldboy'

    def __init__(self,name,age,gender):
        self.name = name
        self.age = age
        self.gender = gender

    def tecahing(self):
        print('%s is teaching' % self.name)

class Student():
    school = 'oldboy'

    def __init__(self,name,age,gender,number):
        self.name = name           #   ,                ,       ,        ,   
        self.age = age
        self.gender = gender
        self.number = number

    def studying(self):
        print('%s is studying')

                ,       ,          ,             
        ,                            ,        
class Teacher:
    school = 'oldboy'

    def __init__(self,name,age,gender):
        self.name = name
        self.age = age
        self.gender = gender

    def tecahing(self):
        print('%s is tecahing' % self.name)

class Student(Teacher):
    def studying(self):
        print('%s is studying' % self.name)

t1 = Teacher('egon',67,'male')
t1.tecahing()
print(t1.age)
print(t1.gender)

stu1 = Student('deng',18,'male')
stu1.studying()
print(stu1.age)
print(stu1.gender)


 .  
                 ,   
      ,     ?
             ,          (     ,       ),          

           ,         ,           ,            ,
                      (      ,  ,  ),                    
              ,     ,           (  ),      ,
                    (    ,   )
                ,         ,                  ,       

      ,                      ,       ,             
     3

 3
class OldboyPerson:                 # OldboyPerson                    ,      ,     
    school = 'oldboy'

    def __init__(self,name,age,gender):
        self.name = name
        self.age = age
        self.gender = gender

    def say_hi(self):
        print('hello,i am %s' % self.name)


class Tecaher(OldboyPerson):
    def tecahing(self):
        print('%s is tecahing' % self.name)

class Student(OldboyPerson):
    def studying(self):
        print('%s is studying' % self.name)


t1 = Tecaher('egon',79,'female')
t1.tecahing()
t1.say_hi()                           #   ,egon deng                ,     

stu1 = Student('deng',18,'man')
stu1.studying()
stu1.say_hi()

 .        
             
           --->  
           
           --->      --->    --->      ..........--->object

    object:
        object        ,             object
                                 object
        object             

           :
                  object        python3         
        python2        object         object         
                                   

class Father(object):
    age =  30

class Son(Father):
    # age = 7
    pass
s1 = Son()
# print(s1.__dict__)
# s1.age = 29                #        age,        age,    ,      age
# print(s1.__dict__)
print(s1.age)


  .           
                        
      ： list                    


class MyList(list):
    def append(self,object):
        print('append run')
        if type(object) == int:
            list.append(self,object)
        else:
            print('          ')

li = MyList()
# li.append(100)
# print(li)

li.append('abc')
print(li)


 .      
      :
                  ,             ,       
                       

      :
              ,                ,      ,           
                 ,   

class Person:
    def __init__(self,name,age,gender):
        self.name = name
        self.age = age
        self.gender = gender

    def say_hi(self):
        print('  ,  %s' % self.name)

class Student(Person):
    #        say_hi   
    def say_hi(self):
        print('hello my name is %s,age is %s' % (self.name,self.age))

stu1 = Student('deng',18,'man')
stu1.say_hi()

 .          
         ,               
          super().      
class Person:
    test = '1234'

    def __init__(self,name,age,gender):
        self.name = name
        self.age = age
        self.gender = gender

    def say_hi(self):
        print(self.name,self.age,self.gender)

class Student(Person):
    def __init__(self,name,age,gender,number):
        # self.name = name
        # self.age = age
        # self.gender = gender
        # Person.__init__(self,name,age,gender)          #                                
        # super(Student, self).__init__(name,sex,age)    # super        python2    
        super().__init__(name,age,gender)                # super()                  
        self.number = number
        print(super().test) #         
    def say_hi(self):
        super().say_hi()
        print(self.number)


stu1 = Student("Egon", "woman", 100,"olboy 007")
stu1.say_hi()

転載先:https://www.cnblogs.com/dengyanchuan/p/10402185.html