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The Art of Subclassing


[EuroPython 2011] Raymond Hettinger - 24 June 2011 in "Track Spaghetti"


All problems have simple, easy-to-understand, logical wrong answers. Subclassing in Python is no exception. Avoid the common pitfalls and learn everything you need to know about how subclass in Python.

  • Overriding and extending
  • Calling your parents
  • The ellipse / circle problem - what does a subclass mean?
  • Liskov Substitution Principle
  • Open Closed Principle
  • The facts of life when subclassing builtin types
  • How to Implement Cooperative Multiple Inheritance
  • A example of perfect and simple python diamond
  • Beware the Concrete C API


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