Purpose of polymorphism in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a method that can be used by different classes.

Python

class Animal:
    def sound(self):
        [1]

Drag options to blanks, or click blank then click option'

Areturn 5

Bprint('Hello')

Cself.sound()

Dpass

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to call the method inside itself causing recursion.

Returning a value when the method should be empty.

The pass statement is used to define an empty method that can be overridden by subclasses, enabling polymorphism.

2fill in blank

medium

Complete the code to override the method in the subclass.

Python

class Dog(Animal):
    def sound(self):
        [1]('Bark')

Drag options to blanks, or click blank then click option'

Aprint

Breturn

Cpass

Dinput

Attempts:

3 left

💡 Hint

Common Mistakes

Using return instead of print which won't show output.

Leaving the method empty with pass.

The print function outputs the dog's sound, overriding the base class method.

3fill in blank

hard

Fix the error in the code to call the correct method for each animal.

Python

def animal_sound(animal):
    [1].sound()

Drag options to blanks, or click blank then click option'

Aanimal

Banimal.sound()

Canimal()

Danimal.sound

Attempts:

3 left

💡 Hint

Common Mistakes

Adding parentheses after the method name in the blank causing syntax errors.

Using the method name without the object.

The variable animal is the object, so calling animal.sound() is correct. The blank should be the object animal to call its method.

4fill in blank

hard

Fill both blanks to create a list of animals and call their sounds using polymorphism.

Python

animals = [[1], [2]]
for a in animals:
    a.sound()

Drag options to blanks, or click blank then click option'

ADog()

BAnimal()

CCat()

DBird()

Attempts:

3 left

💡 Hint

Common Mistakes

Using the base class Animal() which has no sound implementation.

Using class names without parentheses, which are not instances.

Creating instances of Dog and Cat classes allows calling their overridden sound() methods, demonstrating polymorphism.

5fill in blank

hard

Fill all three blanks to define classes and demonstrate polymorphism with a function.

Python

class [1]:
    def sound(self):
        pass

class [2]([1]):
    def sound(self):
        print('Meow')

def make_sound(animal):
    animal.sound()

make_sound([2]())

Drag options to blanks, or click blank then click option'

AAnimal

BCat

CDog

DBird

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing class names or forgetting to inherit from the base class.

Calling the function with the wrong class instance.

The base class Animal defines the method sound. The subclass Cat overrides it. The function make_sound calls the correct method showing polymorphism.