The Fun of Reinvention
summary
Live-coded a tiny contract framework that actually enforces runtime checks: uses Python 3.6 features like f-strings, ordered dicts, function annotations, signature binding and decorators, descriptors to validate attribute sets, and an __init_subclass__ and metaclass prepare trick with ChainMap to auto-register contracts across modules. The demo runs in a terminal presentation script (iTerm2 inline images) and proves the idea works: annotated functions and classes raise clear assertion errors when given bad inputs, showing how modern Python makes this kind of reinvention practical.
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chapters (11)
- 0:00Introduction
- 2:50Python
- 7:43Reinventing
- 9:55Prototypes
- 12:44Dictionaries
- 13:56GCD Function
- 15:25Annotations
- 18:35Inheritance
- 26:25Decorator
- 30:29Descriptor Protocol
- 41:47Dictionary
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