In the official Python documentation there are examples of descriptors.
Two of them are LoggedAccess and the Number validator:

class A:
    logged = LoggedAccess()
    validated = Number(maxvalue=30)

>>> a = A()
>>> a.logged = 50
INFO:root:Updating 'logged' to 50

>>> a.validated = 50
Traceback (most recent call last):
  ...
ValueError: Expected 50 to be no more than 30

I would like to use both in one attribute.

How can descriptors be reimplemented to support extensibility?

For example, used like this:

class A:
    validated_and_logged = LoggedAccess() + Number(maxvalue=30)

>>> A().validated_and_logged = 50
INFO:root:Updating 'validated_and_logged' to 50
Traceback (most recent call last):
  ...
ValueError: Expected 50 to be no more than 30