Abstract base classes overview in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the module needed for abstract base classes.

Python

from [1] import ABC, abstractmethod

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Ainterface

Babstract

Cabc

Dbase

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-existent module name like 'abstract' or 'interface'.

Forgetting to import the abc module before defining abstract classes.

The abc module provides the tools to create abstract base classes in Python.

2fill in blank

medium

Complete the code to define an abstract base class named Vehicle.

Python

class Vehicle([1]):
    @abstractmethod
    def move(self):
        pass

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AABC

Bobject

CBase

DAbstract

Attempts:

3 left

💡 Hint

Common Mistakes

Inheriting from object instead of ABC.

Using a class name that is not imported or defined.

The class must inherit from ABC to be an abstract base class.

3fill in blank

hard

Fix the error in the method declaration to make it abstract.

Python

class Shape(ABC):
    @abstractmethod
    def [1](self):
        pass

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Aabstract

Bmove

Cabstractmethod

Darea

Attempts:

3 left

💡 Hint

Common Mistakes

Using the decorator name as the method name.

Not naming the method to represent its function.

The method name should be a normal method name like area. The decorator @abstractmethod above makes it abstract.

4fill in blank

hard

Fill both blanks to create a subclass Car that implements the abstract method move.

Python

class Car([1]):
    def [2](self):
        print('Car is moving')

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AVehicle

Bmove

Cdrive

Dobject

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong superclass name.

Implementing a method with a different name than the abstract method.

The subclass Car inherits from Vehicle and implements the abstract method move.

5fill in blank

hard

Fill all three blanks to create an abstract base class Animal with an abstract method sound and a concrete method sleep.

Python

class Animal([1]):
    @[2]
    def [3](self):
        pass

    def sleep(self):
        print('Sleeping...')

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

AABC

Babstractmethod

Csound

Dobject

Attempts:

3 left

💡 Hint

Common Mistakes

Not inheriting from ABC.

Forgetting the @abstractmethod decorator.

Using a wrong method name.

The class inherits from ABC, the method is decorated with @abstractmethod, and the method name is sound.