Duck typing concept in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to call the method that makes the object quack.

Python

class Duck:
    def quack(self):
        print("Quack!")

bird = Duck()
bird.[1]()

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

Aquack

Bwalk

Cswim

Dfly

Attempts:

3 left

💡 Hint

Common Mistakes

Calling a method that does not exist like 'fly' or 'swim'.

The quack() method is called to make the duck quack.

2fill in blank

medium

Complete the code to check if an object has a 'quack' method using duck typing.

Python

def make_it_quack(obj):
    if hasattr(obj, '[1]'):
        obj.quack()
    else:
        print("This object can't quack.")

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

Aquack

Bfly

Cswim

Dwalk

Attempts:

3 left

💡 Hint

Common Mistakes

Checking for a wrong method name like 'fly' or 'swim'.

We check if the object has a quack method to decide if it can quack.

3fill in blank

hard

Fix the error in the code to correctly use duck typing to call 'quack' if available.

Python

class Dog:
    def bark(self):
        print("Woof!")

pet = Dog()
if hasattr(pet, '[1]'):
    pet.quack()
else:
    print("Pet can't quack.")

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

Awalk

Bquack

Crun

Dbark

Attempts:

3 left

💡 Hint

Common Mistakes

Checking for 'bark' but calling 'quack' causes an error.

The code checks if pet has a quack method before calling it. The blank must be 'quack' to match the method call.

4fill in blank

hard

Fill both blanks to create a list of objects that can quack and call their quack method.

Python

class Duck:
    def quack(self):
        print("Quack!")

class Person:
    def quack(self):
        print("I'm pretending to be a duck!")

objects = [Duck(), Person(), 42]
for obj in objects:
    if hasattr(obj, '[1]'):
        obj.[2]()

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

Aquack

Bbark

Dfly

Attempts:

3 left

💡 Hint

Common Mistakes

Using different method names for check and call.

We check if each object has a quack method and then call quack() on it.

5fill in blank

hard

Fill all three blanks to create a function that calls 'quack' if available, else calls 'bark' if available, else prints a message.

Python

def make_sound(obj):
    if hasattr(obj, '[1]'):
        obj.[2]()
    elif hasattr(obj, '[3]'):
        obj.bark()
    else:
        print("No sound method found.")

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

Aquack

Cbark

Dfly

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing method names or calling wrong methods.

The function first checks for quack and calls it, then checks for bark and calls it, otherwise prints a message.