The magic of "self": How Python inserts "self" into methods.
summary
Claim: Python inserts the instance by making plain functions into descriptors whose __get__ creates a bound method so the instance becomes the first arg. Tools shown: the descriptor protocol (implementing __get__), a handwritten FavoriteDescriptor that compares an instance.name to "warwick streamer", and demos of property, classmethod, staticmethod. The descriptor demo returns True/False as expected and the manual invocation of get(None) vs get(instance) reproduces the exact behavior that produces automatic self binding.
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chapters (9)
- 0:00Introduction
- 1:50About me
- 3:17The basics
- 5:53Defining a class with methods
- 10:33What are descriptors
- 12:32Implementing a descriptor
- 18:18decorators
- 20:14Summary
- 22:14Conclusion
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