On Sun, Aug 16, 2020 at 11:18:40AM -0700, Guido van Rossum wrote:
Just to clarify here, I assume you mean that if xarray cares about order-preserving keywords, they should write their methods this way:
def __getitem__(self, index=None, **kwargs):rather than mandating that keyword args are *always* bundled into a single dict parameter.
Um, I'm not sure what "bundled into a single dict parameter" refers to.
That the signature would be
def __getitem__(self, index, kwargs, /):? That sounds bad for people who want to use a few choice keywords. (And I think you'd be against that, for that very reason; as am I.)
Yes, that's exactly it!
The analogy is with comma-separated items in the subscript, which get collected (bundled) into a tuple, rather than allocated to multiple parameters.
And you are correct that I am against that. If people want that behavious for their class, they can use `**kwargs`.
So I think we're on the same page here.