Class Evaluation Steps

Python follows roughly the following steps when evaluating a class definition:

• Reads the body of the class from top to bottom
• Create instances of the descriptors (if any) and bound them to the class attributes
• Calls type.__new__ to create the new object
• Calls __set_name__ on each descriptor (if any)
• Calls __init_subclass__ for all superclasses
• Applies class descorators (if any)
• Bind object to namespace