Deduplicate Python Attendees

Use tuple unpacking and a set to filter unique registrations.

A beginner Linux challenge worth 3 points. Solve it hands-on in a real Linux environment in your browser - no local setup, no fake shells.

The Challenge

Fix /home/labuser/lab/attendees.py so it selects only Python registrations, removes duplicates with a set, sorts the names, and writes Ada,Cleo.