On Mon, Oct 25, 2021 at 3:43 AM Jonathan Fine <jfine2...@gmail.com> wrote: > > Hi > > Please forgive me if it's not already been considered. Is the following valid > syntax, and if so what's the semantics? Here it is: > > def puzzle(*, a=>b+1, b=>a+1): > return a, b > > Aside: In a functional programming language > a = b + 1 > b = a + 1 > would be a syntax (or at least compile time) error. >
There are two possibilities: either it's a SyntaxError, or it's a run-time UnboundLocalError if you omit both of them (in which case it would be perfectly legal and sensible if you specify one of them). I'm currently inclined towards SyntaxError, since permitting it would open up some hard-to-track-down bugs, but am open to suggestions about how it would be of value to permit this. ChrisA _______________________________________________ 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/YVE5PMBV5A7PLX242TMMQH2LW4YL2DXK/ Code of Conduct: http://python.org/psf/codeofconduct/
