Level 1Exercise #4

Normalize a sentence

Collapse repeated whitespace to exactly one space between words.

What you’ll practice

This Level 1 exercise focuses on split + join in the Core Python curriculum. Solve the challenge prompt above using clear, idiomatic Python and the relevant language or standard-library tools.

Relevant Python reference: str.split(), str.join().

Sample Test Cases

Example #1

Input:normalize_spaces(" ship small things ")

Output:"ship small things"

Reference Solution

Reveal Reference Solution

def normalize_spaces(sentence: str) -> str:
    return ' '.join(sentence.split())

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Normalize a sentence

What you’ll practice

Sample Test Cases

Further Reading

Reference Solution