On Sun, Oct 16, 2016 at 4:38 AM, אלעזר <elaz...@gmail.com> wrote: > On Sat, Oct 15, 2016 at 8:36 PM Chris Angelico <ros...@gmail.com> wrote: >> >> On Sun, Oct 16, 2016 at 4:33 AM, אלעזר <elaz...@gmail.com> wrote: >> > You are confusing here two distinct roles of the parenthesis: >> > disambiguation >> > as in "(1 + 2) * 2", and tuple construction as in (1, 2, 3). This >> > overload >> > is the reason that (1) is not a 1-tuple and we must write (1,). >> >> Parentheses do not a tuple make. Commas do. >> >> 1, 2, 3, # three-element tuple >> 1, 2, # two-element tuple >> 1, # one-element tuple >> > And what [1, 2, 3] means? It's very different from [(1,2,3)]. > > Python explicitly allow 1, 2, 3 to mean tuple in certain contexts, I agree. >
Square brackets create a list. I'm not sure what you're not understanding, here. The comma does have other meanings in other contexts (list/dict/set display, function parameters), but outside of those, it means "create tuple". ChrisA _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
