Now that all the preliminaries are out of the way, it is time to see the part of descriptors that is useful: storing the attributes that the descriptor represents. There are a lot of ways to store attributes with a descriptor, and this chapter will go over every option that I’m aware of, starting with the easiest.
Class-Level Storage
Class-level storage is easy; it’s normal storage on the descriptor. As an example, here is a descriptor that creates a basic class-level variable:
class ClassAttr:
def __init__(self, value):
self.value = value
def __get__(self, instance, owner):
return ...
