#!/usr/bin/env python3

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

class Animal(object):

pass

class Dog(Animal):

pass

class Husky(Dog):

pass

a = Animal()

d = Dog()

h = Husky()

print('check a = Animal()...')

print('isinstance(a, Animal) =', isinstance(a, Animal))

print('isinstance(a, Dog) =', isinstance(a, Dog))

print('isinstance(a, Husky) =', isinstance(a, Husky))

print('check d = Dog()...')

print('isinstance(d, Animal) =', isinstance(d, Animal))

print('isinstance(d, Dog) =', isinstance(d, Dog))

print('isinstance(d, Husky) =', isinstance(d, Husky))

print('check h = Husky()...')

print('isinstance(h, Animal) =', isinstance(h, Animal))

print('isinstance(h, Dog) =', isinstance(h, Dog))

print('isinstance(h, Husky) =', isinstance(h, Husky))