Understanding __new__ and __init__ in Python

Python objects seem to appear magically when you call a class, but a precise sequence of steps determines how they are constructed and prepared for use. Learning the difference between construction and initialization is crucial for advanced class design. By the end of this course, you will have a deep understanding of Python’s object creation process. You will know exactly when and how to override the __new__ method to control instance creation, enforce design constraints, or manage complex inheritance hierarchies, moving beyond standard class definitions. What you'll learn: * Understand the execution order of __new__ and __init__ and their distinct responsibilities in the object lifecycle. * Master the required method signatures and return values for correctly implementing the __new__ method in custom classes. * Apply advanced techniques like overriding __new__ to implement the Singleton pattern effectively. * Practice defining classes that enforce constraints or customize the creation of immutable objects using construction logic. * Learn to use modern Python type hints correctly when defining method signatures for both __new__ and __init__. The course begins with foundational concepts of class instantiation and inheritance. We then dive into practical scenarios, analyzing existing object implementations before writing and testing our own custom __new__ methods using clear, written examples and exercises. This course is designed for beginner to intermediate Python developers who are comfortable with basic classes and inheritance and want to deepen their knowledge of object-oriented programming internals. No prior experience with metaprogramming or the __new__ method is required. Start mastering the fundamentals of Python object creation today.