Level 1Exercise #20

Stable task priority

Sort tasks high, medium, low while preserving input order within each priority.

What you’ll practice

This Level 1 exercise focuses on stable sorting 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: Sorting HOWTO, sorted().

Sample Test Cases

Example #1

Input:sort_tasks([{"name":"A","priority":"low"},{"name":"B","priority":"high"},{"name":"C","priority":"high"}])

Output:B, C, A

Reference Solution

Reveal Reference Solution

def sort_tasks(tasks: list[dict]) -> list[dict]:
    rank = {'high': 0, 'medium': 1, 'low': 2}
    return sorted(tasks, key=lambda task: rank[task['priority']])

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Stable task priority

What you’ll practice

Sample Test Cases

Further Reading

Reference Solution