By the way, this discussion is probably better suited to the
Python-Ideas mailing list. But since we're here...
On Tue, Nov 09, 2021 at 11:37:40AM +0100, Sebastian Rittau wrote:
> >>To me, the "natural" solution looks like this:
> >>
> >>def foo(x=None, y): ...
[...]
Chris Angelico asked:
> >What would this mean, though:
> >
> >foo(2)
> >
> >Is that legal?
>
> No. This would be equal to foo(x=2) (same as now), meaning the required
> argument "y" is missing.
That's an odd interpretation. What you described earlier is very similar
to the calling convention of range, which conceptually looks like this:
range([start=0,] end, [step=1])
With your example of "foo(x=None, y)" I would expect foo(2) to mean that
x gets the default and y gets the passed in argument 2, similar to the
way that range(2) works.
--
Steve
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