Season 2: The Python Team · Episode 6 of 8
The Inheritance Plot Twist
You play: AI Engineering Trainee
Free
Episodes run on a tablet or larger screen.
The situation
Livestream creators need extra reporting fields on top of the standard creator report. A rushed LiveCreatorReport subclass copied the whole parent method, added two lines, and quietly broke the standard report for everyone else.
What you'll learn
- PCAP 4.4-4.5: introspection (isinstance / issubclass / hasattr), inheritance, method overriding, polymorphism, `super()`, and choosing inheritance vs composition.
- Multiple inheritance and the MRO, super() as the next class in the MRO, __name__, __module__ and __bases__, isinstance and issubclass, and duck-typed polymorphism.
Who you work with
Maya Chen
Senior AI Engineer · Your mentor
Amara Okafor
ML and Data Engineer
Scenes
- 1.It worked yesterday
- 2.Predict the override
- 3.The diamond
- 4.Extend, don't fork
- 5.Inheritance or composition?
- 6.Inheritance check
What you leave with
LiveReport reuses the base summary through super and appends its extra field. ScheduledReport holds a compatible report and delegates to summary instead of inheriting its interface. Keep tests for both behaviours when the base changes.