[ddejohn]

That is an entirely different use-case than a function signature allowing arbitrary keyword arguments. Arbitrary keyword args are different than arbitrary positional args like you have in your example.

GP is suggesting that one should only ever use explicit keyword-only args (anything listed after `*,` in the signature) versus arbitrary keyword args implicit via `**kwargs`.

e.g. (omitting type hints for clarity):

    def sum(*args, **arbitrary_kwargs):
        ...

vs

    def sum(*args, some_keyword_only_arg):
        ...

In my opinion if one finds themselves writing code that uses arbitrary kwargs, they've got a design problem.**