On Tue, Oct 8, 2019, 12:46 Anders Hovmöller <bo...@killingar.net> wrote:
> > > On 8 Oct 2019, at 18:35, Todd <toddr...@gmail.com> wrote: > > On Tue, Oct 8, 2019 at 12:22 PM Andrew Barnert via Python-ideas < > python-ideas@python.org> wrote: > >> On Oct 7, 2019, at 21:21, Caleb Donovick <donov...@cs.stanford.edu> >> wrote: >> > >> > > But what if you wanted to take both positional AND keyword? >> > >> > I was suggesting that that wouldn't be allowed. So subscript either >> has a single argument, a tuple of arguments, or a dictionary of arguments. >> Allowing both has some advantages but is less cleanly integratible. >> >> The problem is that half the examples people conjure up involve both: >> using the keywords as options, while using the positional arguments for the >> actual indices. Calling the proposal “kwargs in getitem” encourages that >> thinking, because that’s the prototypical reason for kwargs in function >> calls. >> >> If there were non-toy examples, so people didn’t have to imagine how it >> would be used for themselves, that might be helpful. >> >> > Here is an example modified from the xarray documentation, where you want > to assign to a subset of your array: > > da.isel(space=0, time=slice(None, 2))[...] = spam > > With this syntax this could be changed to: > > da[space=0, time=:2] = spam > > > I must have missed something... when did the proposal we're discussing > start allowing : there? > > / Anders > Why wouldn't it?
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