learn-python3/samples/oop_basic/animals.py at master · sofay/learn-python3 · GitHub

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#!/usr/bin/env python3

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

class Animal(object):

def run(self):

print('Animal is running...')

class Dog(Animal):

def run(self):

print('Dog is running...')

class Cat(Animal):

def run(self):

print('Cat is running...')

def run_twice(animal):

animal.run()

a = Animal()

d = Dog()

c = Cat()

print('a is Animal?', isinstance(a, Animal))

print('a is Dog?', isinstance(a, Dog))

print('a is Cat?', isinstance(a, Cat))

print('d is Animal?', isinstance(d, Animal))

print('d is Dog?', isinstance(d, Dog))

print('d is Cat?', isinstance(d, Cat))

run_twice(c)

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