Feel free to use the exact code from slides $21-26.$

Then, add an additional mammal to the animals.py file as well as make sure you update your polymorphism$\_$demo file, the result should display the new animal name and its unique sound.

Please upload screen captures of the code and testing result for credit.

Let's create a new script and call it animals.pv

$*$ The Mammal class represents a generic mammal.

class Mammal:

$\backslash$# The $\_\_$init$\_\_$ method accepts an argument for

$\backslash$# the mammal's species.

def $\_\_$init$\_\_($self$,$ species$)$:

self.$\_\_$species $=$ species

$\backslash$# The show$\_$species method displays a message

$\backslash$# indicating the mammal's species.

def show$\_$spectes$($self$)$:

print$(\text{'}$I am a$\text{'},$ self.$\_\_$species$)$

$\backslash$# The make$\_$sound method is the mammal's

$\backslash$# way of making a generic sound.

def make$\_$sound$($self$)$:

print$(\text{'}$Grrrrr$\text{'})$

Now let's add the dog class to the animals.py file

$\backslash$# The Dog class is a subclass of the Mammal Superclass.

class Dog$($Mammal$)$:

$\backslash$# The $\_\_$init$\_\_$ method calls the superclass's

$\backslash$# $\_\_$init$\_\_$ method passing 'Dog' as the species.

def $\_\_$init$\_\_($self$)$:

Mammal.$\_\_$init$\_\_($self$,$ 'Dog'$)$

$\backslash$# The make$\_$sound method overrides the superclass's

$\backslash$# make$\_$sound method.

def make$\_$sound$($self$)$:

print$(\text{'}$Woof$!$ Woof!$\text{'})$

Now let's create a new file called polymorphism$\_$demo.py

$$This program demonstrates polymorphism.

import animals

def main$()$:

$```$

# Create a Mammal object, a Dog object, and

# a Cat object.

mammal $=$ animals.Mammal$(\text{'}$regular animal'$)$

dog $=$ animals.Dog$()$

cat $=$ animals.Cat$()$

$```$

$\backslash$# Display information about each one.

print$(\text{'}$Here are some animals and'$)$

print$(\text{'}$the sounds they make.$\text{'})$

print$(\text{'}-----------------------\text{'})$

show$\_$mammal$\_$info$($mammal$)$

print$()$

show$\_$mammal$\_$info$($dog$)$

print$()$

show$\_$mammal$\_$info$($cat$)$ Now let's add an update to our polymorphism$\_$demo file for testing:

$```$

show$\_$mammal$\_$info$($dog$)$

print$()$

show$\_$mammal$\_$info$($cat$)$

print$()$

show$\_$mammal$\_$info$(\text{'}$bird$\text{'})$

$*$ The show$\_$mammal$\_$info function accepts an object

$*$ as an argument, and calls its show$\_$species

$*$ and make$\_$sound methods.

def show$\_$mammal$\_$info$($creature$)$:

if isinstance$($creature$,$ animals.Mammal$)$:

creature.show$\_$species$()$

creature.make$\_$sound$()$

else:

print$(\text{'}$That is not a Mammal!$\text{'})$

$```$