On Sun, Oct 20, 2019 at 03:06:16PM -0700, Guido van Rossum wrote: > So the choice is really only three way. > > 1) Add d1 + d2 and d1 += d2 (using similarity with list + and +=) > 2) Add d1 | d2 and d1 |= d2 (similar to set | and |=) > 3) Do nothing
Are you saying a method is a non-starter? A method won't satisfy those who prefer an operator, but it otherwise has a number of advantages, and few (that I can see) disadvantages. I think your analysis here: > IMO the reason this is such a tough choice is that Python learners are > typically introduced to list and dict early on, while sets are introduced > later. [...] > So if we want to cater to what most beginners will know, + and += would be > the best choice. But if we want to be more future-proof and consistent, | > and |= are best -- after all dicts are closer to sets (both are hash > tables) than to lists. (I know you can argue that dicts are closer to lists > because both support __getitem__ -- but I find that similarity shallower > than the hash table nature.) is excellent, and I think I shall steal it for the PEP :-) -- Steven _______________________________________________ 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/DFJKEWOW4BB7CB7UFGQJ4BKLDPB6ETBP/ Code of Conduct: http://python.org/psf/codeofconduct/