On 10/24/21 11:22 PM, Steven D'Aprano wrote: > On Sun, Oct 24, 2021 at 05:40:55PM +0100, Jonathan Fine wrote:
>> def puzzle(*, a=>b+1, b=>a+1): >> return a, b > We can consider that to be syntactic sugar for: > > def puzzle(*, a=None, b=None): > if a is None: > a = b+1 > if b is None: > b = a+1 > > So that has a perfectly sensible interpretation: > > - a is optional > - b is optional > - but you must supply at least one. > > and should be perfectly legal. I see no reason to prohibit it. > > (It would be nice if we could give a better exception, rather than just > UnboundLocalError, but that's not essential.) +1 _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/MAUVXBGGSIEW4UGZMUECBVXXY5CZGEQU/ Code of Conduct: http://python.org/psf/codeofconduct/
