A discussion of Python decorators: In this part we discuss the singleton factory. A decorator that makes sure that a class has exactly one instance in existence at any time.

A discussion of Python decorators: We discuss our first type of class decorator. A simple decorator that modifies all non dunder methods in the class.

A discussion of Python decorators: We discuss a decorator that enabled feature flags for functions. Thus environment variables can control which functions are available and which are not.