Common string transformations in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to convert the string to uppercase.

Python

text = "hello world"
result = text.[1]()
print(result)

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

Alower

Bcapitalize

Ctitle

Dupper

Attempts:

3 left

💡 Hint

Common Mistakes

Using lower() which converts to lowercase instead.

Using capitalize() which only changes the first letter.

The upper() method converts all letters in the string to uppercase.

2fill in blank

medium

Complete the code to remove whitespace from both ends of the string.

Python

text = "  hello world  "
clean_text = text.[1]()
print(clean_text)

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

Astrip

Brstrip

Clstrip

Dtrim

Attempts:

3 left

💡 Hint

Common Mistakes

Using rstrip() which removes spaces only from the right.

Using lstrip() which removes spaces only from the left.

Using trim() which is not a valid Python string method.

The strip() method removes whitespace from both the start and end of the string.

3fill in blank

hard

Fix the error in the code to replace all spaces with underscores.

Python

text = "hello world"
new_text = text.[1](" ", "_")
print(new_text)

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

Aswitch

Breplace

Cchange

Dsubstitute

Attempts:

3 left

💡 Hint

Common Mistakes

Using substitute() which is not a string method.

Using switch() or change() which do not exist for strings.

The replace() method replaces all occurrences of the first string with the second string.

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 = ["apple", "bat", "car", "dolphin"]
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)

Bword

C>

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using the word itself as the value instead of its length.

Using '<=' instead of '>' causing wrong filtering.

Use len(word) to get the length of each word and filter 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 4 letters.

Python

words = ["apple", "bat", "car", "dolphin"]
result = { [1]: [2] for word in words if len(word) [3] 4 }
print(result)

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

Aword.upper()

Blen(word)

C>

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

Using the word itself as key instead of uppercase.

Using '<' instead of '>' causing wrong filtering.

Use word.upper() for keys, len(word) for values, and filter words with length greater than 4 using >.