Inheritance models an "is-a" relationship, allowing a class to inherit attributes and methods from a parent class. Polymorphism, enabled by duck typing and method overriding, allows objects of different classes to be treated as objects of a common type.
However, as the course notes explain, descriptors can introduce challenges when dealing with non-hashable objects or preventing memory leaks; solutions like WeakKeyDictionary or using id() for keys may be necessary in certain scenarios. python 3 deep dive part 4 oop high quality
s = Secret() print(s._Secret__private) # Accessible via mangled name # print(s.__private) # AttributeError Inheritance models an "is-a" relationship, allowing a class