A programming language structure ... major features in object-oriented programming that makes them different than non-OOP languages: encapsulation, inheritance and polymorphism.

In some languages like Python, the keyword is self. The syntax may be unfamiliar, but using objects as a conceptual framework helps make the structure of almost any object-oriented programming ...

It covers both object-oriented programming techniques and their application to program design including classes, objects and objects lifecycle, abstraction, encapsulation, inheritance, polymorphism ...