On Mon, 9 May 2022 at 07:36, Jeremiah Vivian <nohackingofkrow...@gmail.com> wrote: > > On Sun, 8 May 2022 at 20:52, Steven D'Aprano <st...@pearwood.info> wrote: > > Just a quick straw poll, how would people feel about relaxing the > > restriction on the walrus operator so that iterable unpacking is > > allowed? > > > > # Currently a syntax error. > > results = (1, 2, (a, b) := (3, 4), 5) > > > > which would create the following bindings: > > > > results = (1, 2, (3, 4), 5) > > a = 3 > > b = 4 > > I've always thought of relaxing the restrictions. It's actually easy to > implement (even including attribute assignment/subscript assignment) and I > had to modify only two files (plus regenerate the parser). >
The restrictions were never technical. They were always social - too many people were scared that assignment expressions would lead to a plethora of problems. (Which is not unreasonable. Guido made assignment a statement very deliberately, back when Python was first created. Changing that decision, or even modifying it slightly, should indeed be thoroughly thought out.) Requiring that the target be a simple name only was one way to minimize the risk. 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/4QHZQTA73B66GGGNVWRXM73M5OEX3GOI/ Code of Conduct: http://python.org/psf/codeofconduct/
