[Python-ideas] Re: PEP 472 - regarding d[x=1, y=2] and similar

On Sat, Aug 15, 2020 at 08:26:10PM -0700, Guido van Rossum wrote:

Are you saying that for xarray it is important to distinguish between `d[day=3, detector=4]` and `d[detector=4, day=3]`? If we just passed the keyword args to `__getitem__` as an extra `**kwds` argument (which preserves order, since Python 3.6 at least), that should work, right? If not, can you clarify?

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.