This course introduces the fundamentals of Object-Oriented Programming (OOP) in Python, a paradigm widely adopted for structuring complex software. It begins with an explanation of what OOP is and why it is popular, followed by the core principles of OOP: inheritance, polymorphism, encapsulation, and abstraction. Students will also learn how to document classes and methods professionally. The course concludes with practical case studies, allowing learners to apply these concepts in real-world scenarios.