Basic list comprehension syntax in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a list of squares from 1 to 5.

Python

squares = [x[1]2 for x in range(1, 6)]
print(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 but does not square.

Using + which adds instead of powers.

The ** operator is used to raise a number to a power. Here, x**2 means x squared.

2fill in blank

medium

Complete the code to create a list of even numbers from 0 to 10.

Python

evens = [x for x in range(11) if x [1] 2 == 0]
print(evens)

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A%

B//

C**

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using // which is floor division, not remainder.

Using ** which is power, not related to even check.

The % operator gives the remainder. If x % 2 == 0, x is even.

3fill in blank

hard

Fix the error in the list comprehension to get lengths of words.

Python

lengths = [[1] for word in words]

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Alength(word)

Bword.len()

Cword.length

Dlen(word)

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to use word.len() which is not valid in Python.

Using length(word) which is not a Python function.

Use the built-in len() function to get the length of a string in Python.

4fill in blank

hard

Fill both blanks to create a dictionary of word lengths for words longer than 3 letters.

Python

lengths = {word: [1] for word in words if [2] > 3}

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Alen(word)

Bword

Dword.length

Attempts:

3 left

💡 Hint

Common Mistakes

Using word.length which is not valid in Python.

Using word instead of len(word) for length.

The key is the word itself, and the value is its length using len(word). The condition checks if the length is greater than 3.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase keys and values for words longer than 4 letters.

Python

result = [1]: [2] for w in words if [3] > 4}

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Aw.upper()

Bw

Clen(w)

Dw.lower()

Attempts:

3 left

💡 Hint

Common Mistakes

Using w.lower() instead of uppercase for keys.

Using w.length which is invalid in Python.

The keys are uppercase words using w.upper(), values are the original words w, and the condition checks if the length len(w) is greater than 4.