Self reference in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to make the method return the instance itself.

Python

class Box:
    def get_self(self):
        return [1]

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

Aself

BBox

Cthis

Dinstance

Attempts:

3 left

💡 Hint

Common Mistakes

Returning the class name instead of the instance.

Using 'this' which is not a Python keyword.

The keyword self refers to the current instance of the class. Returning self returns the object itself.

2fill in blank

medium

Complete the code to set an attribute on the instance using self reference.

Python

class Person:
    def __init__(self, name):
        [1].name = name

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

APerson

Bthis

Ccls

Dself

Attempts:

3 left

💡 Hint

Common Mistakes

Using the class name instead of the instance.

Using 'cls' which is for class methods.

Inside instance methods, self is used to access or set attributes on the current object.

3fill in blank

hard

Fix the error in the method to return the instance's attribute using self reference.

Python

class Car:
    def __init__(self, model):
        self.model = model
    def get_model(self):
        return [1].model

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

Aself

BCar

Ccls

Dmodel

Attempts:

3 left

💡 Hint

Common Mistakes

Using the class name instead of the instance.

Trying to access attribute directly without self.

To access instance attributes inside methods, use self.

4fill in blank

hard

Fill both blanks to create a method that returns a new instance referencing the current instance's attribute.

Python

class Node:
    def __init__(self, value):
        self.value = value
    def copy(self):
        return [1](self.[2])

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

ANode

Bvalue

Cself

Dcopy

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'copy' as a class name.

Using 'value' instead of 'self' to access attribute.

The method creates a new Node instance using the current instance's value accessed via self.

5fill in blank

hard

Fill all three blanks to define a method that updates the instance's attribute and returns the instance itself.

Python

class Counter:
    def __init__(self, count=0):
        self.count = count
    def increment(self, amount):
        [1].count += [2]
        return [3]

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

Aself

Bamount

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Returning amount instead of the instance.

Using the attribute name instead of self.

The method uses self to update the count attribute by amount and returns self to allow chaining.