Sorting and reversing lists in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to sort the list in ascending order.

Python

numbers = [5, 3, 8, 1]
numbers.[1]()
print(numbers)

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

Apop

Breverse

Cappend

Dsort

Attempts:

3 left

💡 Hint

Common Mistakes

Using reverse() instead of sort(), which only flips the list order.

Using append() or pop(), which add or remove items instead of sorting.

The sort() method arranges the list items in ascending order.

2fill in blank

medium

Complete the code to reverse the order of the list.

Python

letters = ['a', 'b', 'c', 'd']
letters.[1]()
print(letters)

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

Areverse

Bpop

Csort

Dinsert

Attempts:

3 left

💡 Hint

Common Mistakes

Using sort() which arranges items but does not reverse the current order.

Using pop() or insert() which modify list items but do not reverse.

The reverse() method flips the order of the list items.

3fill in blank

hard

Fix the error in the code to sort the list in descending order.

Python

scores = [70, 85, 90, 60]
scores.sort([1]=True)
print(scores)

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

Areverse=True

Bdescending

Creverse

Dreverse_order

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect argument names like 'descending' or 'reverse_order'.

Putting the whole argument 'reverse=True' as the blank instead of just the argument name.

The sort() method uses the reverse=True argument to sort descending. The blank should be the argument name reverse.

4fill in blank

hard

Fill both blanks to create a dictionary with words as keys and their lengths as values, only for words longer than 3 letters.

Python

words = ['cat', 'house', 'tree', 'a', 'dog']
lengths = {word: [1] for word in words if len(word) [2] 3}
print(lengths)

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

Alen(word)

B<=

C>

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong comparison operator like '<=' which selects shorter words.

Using 'word' instead of 'len(word)' for the dictionary values.

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

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase words as keys and their lengths as values, only for words longer than 2 letters.

Python

words = ['hi', 'hello', 'yes', 'no']
result = { [1]: [2] for w in words if len(w) [3] 2 }
print(result)

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

Aw.upper()

Blen(w)

C>

Dw.lower()

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase words as keys instead of uppercase.

Using wrong comparison operator like '<='.

Using the word itself as value instead of its length.

The dictionary comprehension uses w.upper() as keys, len(w) as values, and filters words longer than 2 with >.