Python
Properties: Getters and Setters Done the Python Way
@property turns a method into an attribute. It lets you start with a plain attribute and add validation later without changing a single line of callin...
Advanced OOP
Properties, class and static methods, abstract base classes, the MRO, composition and mixins.
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Notes
Python
Class Methods and Static Methods
An instance method receives the object, a class method receives the class, and a static method receives neither. Each exists for a different job.
Python
Abstract Base Classes and Interfaces
An abstract base class states what subclasses must implement, and refuses to let an incomplete one be created. It is how Python enforces a contract.
Python
Multiple Inheritance and the MRO
A class can inherit from several parents. The method resolution order decides which version wins, and C3 linearisation is the algorithm that computes...
Python
Composition, Delegation and Design Choices
Inheritance says "is a"; composition says "has a". Most of the time the honest answer is "has a", and the resulting design is easier to change.