Under and Dunder - Python secret functions
summary
Covers Python’s single-underscore convention and double-underscore name mangling, shows how dir() exposes attributes, and demonstrates concrete dunder methods: implementing __getitem__, __len__, __iter__ and __next__ to make a custom Sequence class that returns squares for indexing, reports length as 999, and yields the value seven repeatedly until a counter triggers StopIteration. Live notebook examples show how secret methods get renamed, when they can be called internally, and how iterator protocols actually drive for-loops.
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chapters (9)
- 0:00Intro
- 0:18Welcome
- 0:38About me
- 2:40Python internal functions
- 11:40Object attributes
- 14:10List
- 16:40Length
- 18:30Iterator
- 24:30Conclusion
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