Summary
I recorded this video to address recent lab problems, clarify upcoming class activities, and reinforce object‑oriented design and debugging techniques before the final exam. After reviewing the lab issues, I proposed dedicating one class on Wednesday to a comprehensive final‑exam review and another on Friday for a hands‑on debugging workshop, and I confirmed the vote for this schedule. I then demonstrated systematic debugging using a gym‑class OOP example, highlighting common Python pitfalls such as mutable default arguments and forgetting parentheses on method calls. I showed how to fix these bugs with print statements and static‑method alternatives, and I explained design trade‑offs for where enrollment data should reside—either in the GymClass or the Member—emphasizing the importance of a single source of truth and efficient query patterns. Next, I led a library‑system exercise where we debated whether checkout/return behavior belongs on the Book or the Patron class, illustrating many‑to‑many relationships and ownership decisions.
For the final lab, I guided the implementation of a simple music‑app model: a Song class (title, artist, duration) and a Playlist class (name, list of songs) with add, remove, total_duration, and songs_by_artist methods. I corrected naming errors and reinforced that overusing inheritance is discouraged in production code. I concluded by outlining next week’s schedule: Wednesday’s exam review, Friday’s debugging workshop, and makeup lab slots on Thursday and Friday for students who need to finish assignments. I reassured the class that grades will be curved and that unfinished labs can be submitted during the makeup sessions. The key actions are to attend the review and workshop, apply the debugging strategies shown, choose appropriate class ownership in future designs, and submit any pending lab work within the makeup windows.