I think the word "attribute" is preferred over "value" because "value" can mean just about anything, whereas, according to https://docs.python.org/3/glossary.html?highlight=glossary , an attribute is specifically:

"""A value associated with an object which is referenced by name using dotted expressions. For example, if an object `o` has an attribute `a` it would be referenced as `o.a`."""

The phrase "class attribute" is used throughout the documentation to mean an attribute of a class. To reference the class attribute called `foo` of the class called `MyClass`, we write `MyClass.foo`.

Unless I misunderstand you, I don't think there is an issue.