Make name lookups follow MRO within a class definition

[blhsing (Ben Hsing)]

@storchaka

This feature looks specific to EnumParam, so why not implement it in EnumParam?

No, this feature is not at all specific to EnumParam.

In fact, it has been a highly demanded feature from many Python users who also find having to explicitly reference the base class for a supposedly inherited name in the body of a child class counter-intuitive.

List of StackOverflow questions demanding this very feature, many of them highly voted:

python subclass access to class variable of parent

Accessing parent class attribute from sub-class body

How to inherit and extend class attributes in Python?

Accessing attribute from parent class inside child class

python - Class attributes apparently not inherited

Augmenting class attribute when inheriting in Python

Aren’t class attributes inherited?

How to access super attribute at class level attribute's definition

Create class attribute derived from base class's class attribute

I’m going to update my original post with links to these SO questions instead now that I realized I misunderstood @alicederyn.