MRO is determined by the C3 linearization algorithm from "summary" of Fluent Python by Luciano Ramalho
In Python, the Method Resolution Order (MRO) is the order in which base classes are searched when looking for a method in a class hierarchy. This determines which method is executed when a method is called on an object. The MRO is determined using the C3 linearization algorithm, which was designed to provide a consistent and predictable order for method resolution in multiple inheritance scenarios. The C3 linearization algorithm takes into account the order in which base classes are defined in a class hierarchy, as well as the order in which classes are inherited. It creates a linearization of the class hierarchy that ensures that a class's methods are always called in the correct order, based on the class's position in the hierarchy. By using the C3 linearization algorithm, Python is able to handle complex multiple inheritance scenarios in a way that is both efficient and intuitive. This algorithm ensures that method resolution is always unambiguous and follows a consistent and predictable order. This is important in situations where a class inherits from multiple base classes that may have overlapping method names.- Python is able to provide a powerful and flexible inheritance model that allows for the creation of complex class hierarchies without sacrificing clarity or predictability. Overall, the C3 linearization algorithm plays a crucial role in determining the Method Resolution Order in Python and is essential for understanding how method resolution works in a class hierarchy.
