In [2]:

    

class Pen():
    def __init__(self, size, name):
        self.name = name
        self.size = size
    
    def set_name(self, name):
        self.name = name


    

In [3]:

    

class BallPen(Pen):
    def __init__(self, size, name, color):
        self.color = color
        super().__init__(size, name)
    
    def set_color(self, color):
        self.color = color


    

In [4]:

    

class InkPen(Pen):
    def __init__(self, size, name, cart_type):
        self.cart = cart_type
        super().__init__(size, name)


    

In [8]:

    

pb = BallPen(10, "Renolds", "Green")
print(pb.name)
pb.set_name("cello")
print(pb.name)
print(dir(pb))
print(pb.__dict__)


    

    




Renolds
cello
['__class__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__module__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '__weakref__', 'color', 'name', 'set_color', 'set_name', 'size']
{'color': 'Green', 'name': 'cello', 'size': 10}

In [21]:

    

class grand_parent:
    def __init__(self, middle_name):
        self.__middle_name = middle_name
        
    def middle_name(self, middle_name):
        self.__middle_name = middle_name
        return self.__middle_name


    

In [22]:

    

class parent(grand_parent):
    def __init__(self, middle_name, surname):
        self.__surname = surname
        super().__init__(middle_name)
    
    def middle_name(self):
        return self.middle_name


    

In [23]:

    

class student(parent):
    def __init__(self, name, middle_name, surname):
        self.name = name
        super().__init__(middle_name, surname)


    

In [24]:

    

mohan = student("Venkat", "kumar", "Mohan")


    

In [25]:

    

print(mohan.middle_name)


    

    




<bound method parent.middle_name of <__main__.student object at 0x000002413971CBA8>>

In [26]:

    

print(mohan.middle_name("KUMAR"))


    

    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-26-e9c69e945a76> in <module>()
----> 1 print(mohan.middle_name("KUMAR"))

TypeError: middle_name() takes 1 positional argument but 2 were given

In [22]:

    

# NOTE: python 2 has issues with Super , get it also documented here