abstract base class in python

# ========================================================================

# example 4

# ========================================================================

# Python program invoking a

# method using super()

import abc

from abc import ABC, abstractmethod

class A(ABC):

def fun1(self):

print("Abstract Base Class")

class K(A):

def fun2(self):

super().fun1()

print("subclass ")

# Driver code

r = K()

r.fun2()

# -*- coding: utf-8 -*-

"""

Created on Mon Mar  7 23:10:32 2022

@author: durga

"""

# Python program showing

# abstract base class work

# Python program showing

# abstract base class work

# from abc import ABC, abstractmethod

# class Animal(ABC):

# def move(self):

# pass

# class Human(Animal):

# def move(self):

# print("I can walk and run")

# class Snake(Animal):

# def move(self):

# print("I can crawl")

# class Dog(Animal):

# def move(self):

# print("I can bark")

# class Lion(Animal):

# def move(self):

# print("I can roar")

#

# # Driver code

# R = Human()

# R.move()

# K = Snake()

# K.move()

# R = Dog()

# R.move()

# K = Lion()

# K.move()

# from abc import ABC, abstractmethod

# class Polygon(ABC):

# @abstractmethod

# def noofsides(self):

# pass

# class Triangle(Polygon):

# # overriding abstract method

# def noofsides(self):

# print("I have 3 sides")

# class Pentagon(Polygon):

# # overriding abstract method

# def noofsides(self):

# print("I have 5 sides")

# class Hexagon(Polygon):

# # overriding abstract method

# def noofsides(self):

# print("I have 6 sides")

# class Quadrilateral(Polygon):

# # overriding abstract method

# def noofsides(self):

# print("I have 4 sides")

# # Driver code

# R = Triangle()

# R.noofsides()

# K = Quadrilateral()

# K.noofsides()

# R = Pentagon()

# R.noofsides()

# K = Hexagon()

# K.noofsides()

# Python program showing

# implementation of abstract

# class through subclassing

# import abc

# class parent:

# def geeks(self):

# pass

# class child(parent):

# def geeks(self):

# print("child class")

# # Driver code

# print( issubclass(child, parent))

# print( isinstance(child(), parent))

# Python program showing

# abstract properties

import abc

from abc import ABC, abstractmethod

class parent(ABC):

@abc.abstractproperty

def geeks(self):

return "parent class"

class child(parent):

@property

def geeks(self):

return "child class"

try:

r =parent()

print( r.geeks)

except Exception as err:

print (err)

r = child()

print (r.geeks)