Object lifecycle overview in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create an object of class Person.

Python

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

p = [1]("Alice")
print(p.name)

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

APerson

Bobject

Cself

Dinit

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'object' instead of the class name.

Using 'self' outside the class.

Using 'init' which is a method name, not a class.

The correct way to create an object is by calling the class name like a function.

2fill in blank

medium

Complete the code to define a destructor method that prints a message when an object is deleted.

Python

class Car:
    def __del__(self):
        print([1])

c = Car()
del c

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

ACar object deleted

BCar object destroyed

C'Car object deleted'

D'Car object destroyed'

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the string message.

Using print without parentheses (Python 3 requires parentheses).

The destructor method __del__ should print a string message, so it must be in quotes.

3fill in blank

hard

Fix the error in the code to properly initialize the object with a name attribute.

Python

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

pet = Animal("Buddy")
print(pet.name)

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

AAnimal

Bself

Cthis

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using the class name instead of 'self'.

Using 'this' which is not a Python keyword.

Using the attribute name instead of 'self'.

Inside methods, 'self' refers to the current object and is used to set attributes.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps each word to its length only if the length is greater than 3.

Python

words = ["apple", "cat", "banana", "dog"]
lengths = {word: [1] for word in words if len(word) [2] 3}

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

Alen(word)

B>

C<

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' in the condition.

Using 'word' instead of 'len(word)' for the value.

Not filtering words correctly.

The dictionary comprehension uses len(word) to get length and filters words with length greater than 3 using '>'.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps uppercase keys to their values only if the value is greater than 0.

Python

data = {'a': 1, 'b': 0, 'c': 3}
result = { [1]: [2] for k, v in data.items() if v [3] 0 }

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

Ak.upper()

Bv

C>

Dk

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'k' instead of 'k.upper()' for keys.

Using '<' instead of '>' in the condition.

Using 'k' instead of 'v' for values.

The comprehension uses k.upper() as keys, v as values, and filters values greater than 0.