Nested list comprehension in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a nested list of squares for numbers 1 to 3.

Python

nested_squares = [[x[1]2 for x in range(1, 4)] for _ in range(1)]
print(nested_squares)

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

A**

B+

C*

D//

Attempts:

3 left

💡 Hint

Common Mistakes

Using '*' instead of '**' which multiplies instead of exponentiating.

Using '+' which adds numbers instead of squaring.

The ** operator is used to raise a number to a power. Here, x**2 calculates the square of x.

2fill in blank

medium

Complete the code to create a nested list where each inner list contains numbers from 0 to 2.

Python

nested_numbers = [[[1] for j in range(3)] for i in range(3)]
print(nested_numbers)

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

Ai

Bj

Crange(3)

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Using the outer loop variable i inside the inner list comprehension.

Using range(3) directly instead of the loop variable.

The inner list comprehension uses j to generate numbers from 0 to 2 for each outer loop iteration.

3fill in blank

hard

Fix the error in the nested list comprehension to create a 3x3 multiplication table.

Python

multiplication_table = [[i [1] j for j in range(1, 4)] for i in range(1, 4)]
print(multiplication_table)

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A+

B-

C*

D//

Attempts:

3 left

💡 Hint

Common Mistakes

Using '+' which adds numbers instead of multiplying.

Using '//' which does integer division.

The multiplication table requires multiplying i and j using the * operator.

4fill in blank

hard

Fill both blanks to create a nested list of even numbers from 0 to 8.

Python

even_numbers = [[i + j[1]2 for j in range(0, 5)] for i in range(0, 5, [2])]
print(even_numbers)

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A*

B2

C1

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using '+' instead of '*' for multiplication.

Using 1 as step which includes odd numbers.

Multiplying j by 2 generates even numbers. The outer loop increments by 2 to keep even numbers.

5fill in blank

hard

Fill all three blanks to create a nested list of squares of numbers from 1 to 3, repeated 3 times.

Python

result = [[[1] for x in range(1, 4)] for [2] in range([3])]
print(result)

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

Ax**2

Bi

C3

Dj

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same variable name for both loops.

Not squaring the number inside the inner list.

The inner list squares x. The outer loop uses j to repeat 3 times.