Purpose of constructors in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a constructor method in a Python class.

Python

class Car:
    def [1](self):
        self.color = 'red'

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

A__init__

Binit

Cstart

Dconstructor

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'init' without underscores

Using 'constructor' as method name

Using 'start' instead of '__init__'

The constructor method in Python is named __init__. It runs when a new object is created.

2fill in blank

medium

Complete the constructor to accept a parameter and assign it to an instance variable.

Python

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

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

Aself

BName

Cname

Dperson

Attempts:

3 left

💡 Hint

Common Mistakes

Using capitalized 'Name' which is different

Assigning to 'self.self' or 'self.person'

Forgetting to use 'self.' before the variable

The instance variable should match the parameter name to store the value properly.

3fill in blank

hard

Fix the error in the constructor method name.

Python

class Animal:
    def [1](self):
        self.type = 'mammal'

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

A__init__

Binit__

C_init_

Dinitialize

Attempts:

3 left

💡 Hint

Common Mistakes

Using single underscores or missing underscores

Using 'initialize' instead of '__init__'

Misspelling the method name

The constructor must be named exactly __init__ with double underscores on both sides.

4fill in blank

hard

Fill both blanks to create a constructor that sets two instance variables.

Python

class Book:
    def __init__(self, title, author):
        self.[1] = title
        self.[2] = author

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

Atitle

Bname

Cauthor

Dwriter

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names like 'name' or 'writer' for instance variables

Mixing up the order of variables

Forgetting 'self.' before variable names

The instance variables should match the parameter names to store the values correctly.

5fill in blank

hard

Fill all three blanks to create a constructor that initializes three instance variables.

Python

class Laptop:
    def __init__(self, brand, model, price):
        self.[1] = brand
        self.[2] = model
        self.[3] = price

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

Abrand

Bmodel

Cprice

Dcost

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'cost' instead of 'price' for the last variable

Mixing variable names or forgetting 'self.'

Assigning wrong parameters to variables

The instance variables should match the constructor parameters to store the values properly.