Class attributes in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a class attribute named count initialized to 0.

Python

class MyClass:
    [1] = 0

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

Aself.count

Bcount

Cdef count

Dinit_count

Attempts:

3 left

💡 Hint

Common Mistakes

Using self.count instead of just count.

Trying to define the attribute inside a method without self.

Using def keyword which is for methods, not attributes.

The class attribute is defined directly inside the class, without self or def. So count = 0 is correct.

2fill in blank

medium

Complete the code to access the class attribute count inside the method show_count.

Python

class MyClass:
    count = 5
    def show_count(self):
        print([1])

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

Aself.count

Bself.count()

Ccount

DMyClass.count

Attempts:

3 left

💡 Hint

Common Mistakes

Using self.count() which tries to call an attribute as a method.

Using just count which is undefined in method scope.

Using self.count which looks for instance attribute, not class attribute.

To access a class attribute inside a method, use the class name followed by the attribute: MyClass.count.

3fill in blank

hard

Fix the error in the code to correctly increment the class attribute count by 1 inside the method increment.

Python

class MyClass:
    count = 0
    def increment(self):
        MyClass.[1] += 1

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

Acount

Bself.count

Cincrement

DCount

Attempts:

3 left

💡 Hint

Common Mistakes

Using self.count which may create an instance attribute instead.

Using wrong capitalization like Count.

Trying to call increment as attribute.

The class attribute count should be accessed with the exact name and class: MyClass.count.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps each number to its square, but only for numbers where the class attribute threshold is greater than 5.

Python

class Numbers:
    threshold = 5
    squares = {x: x[1]2 for x in range(1, 6) if x [2] threshold}

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

A**

B>

C<

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using * instead of ** for power.

Using wrong comparison operator like > instead of <.

Not using the class attribute threshold correctly.

The operator for power is **. The condition should check if x is less than the threshold (5) to include numbers less than 5.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps uppercase keys to values, but only include items where the value is greater than 10.

Python

class Data:
    items = {'a': 5, 'b': 15, 'c': 20}
    filtered = [1]: [2] for [3], v in items.items() if v > 10}

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

Ak.upper()

Bv

Ck

Ditems

Attempts:

3 left

💡 Hint

Common Mistakes

Using items instead of k in the loop.

Not converting keys to uppercase.

Swapping keys and values in the comprehension.

The keys are converted to uppercase with k.upper(), values are v, and the loop variable for keys is k.