Object-oriented programming (OOP) in Python is a paradigm that organizes code into objects that combine data and methods. Key concepts include encapsulation, which hides the internal state and requires all interaction to be performed through object methods; inheritance, which allows new classes to derive properties and behaviors from existing ones; and polymorphism, which enables methods to be used interchangeably across different classes. These principles help create modular, reusable, and maintainable code. Enhance your skills in Python by joining FITA Academy.