>>> import this
    > ...
    > Explicit is better than implicit.
    > ...
    > There should be one-- and preferably only one --obvious way to do it.

It's one of Python's philosophies (/s).

I agree that this is a more explicit way to handle metaprogramming in Python. It's analogous to method decorators, unlike metaclasses, which has no "metamethod" equivalent (AFAIK).