Core Python Metaclasses and Allocation

What you'll learn
Understanding how to use metaclasses and allocation fluently is an important skill to mastering Python. In this course, Core Python: Allocation and Metaclasses, you'll learn to control how Python creates new classes and allocates instances of classes.
First, you'll explore object allocation. Next, you'll discover metaclasses, the types of types in Python which control how classes are created and initialized. Finally, you'll learn how to leverage these concepts in practical ways.
When you're finished with this course, you'll have the skills and knowledge of metaclasses and object allocation needed to understand how they're used in other people's code and apply them to your own designs.

https://www.pluralsight.com/courses/core-python-allocation-metaclasses