Level 5Exercise #121

Sort semantic versions

Sort dotted numeric version strings numerically by component.

What you’ll practice

This Level 5 exercise focuses on cmp_to_key in the Algorithms curriculum. Solve the challenge prompt above using clear, idiomatic Python and the relevant language or standard-library tools.

Relevant Python reference: Python Standard Library — Algorithms.

Sample Test Cases

Example #1

Input:sort_versions(['1.10','1.2','2.0'])

Output:['1.2','1.10','2.0']

Reference Solution

Reveal Reference Solution

def sort_versions(versions: list[str]) -> list[str]:
    from functools import cmp_to_key
    def compare(a, b):
        left, right = tuple(map(int,a.split('.'))), tuple(map(int,b.split('.')))
        return (left > right) - (left < right)
    return sorted(versions, key=cmp_to_key(compare))

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Sort semantic versions

What you’ll practice

Sample Test Cases

Further Reading

Reference Solution