On Sat, Jun 27, 2020 at 2:29 PM Steven D'Aprano <st...@pearwood.info> wrote: > Seriously, I genuinely thought that the existing behaviour was the > opposite and that `add` unconditionally added the element. "Last seen > wins". If I was designing sets, that's probably how I would design it. > After all, it's called *add*, not *add if not already there*. I was so > sure that this was the current behaviour that I didn't bother to check > it before posting, which is rare for me. > > So I think this counts as the principle of maximal surprise :-)
Well, that's not how Python's dicts OR sets work, so that would be inconsistent. But feel free to do it your own way in your own language. 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/LT74WCVQSXAYZEDOEIVHL73QZ4YJHLI3/ Code of Conduct: http://python.org/psf/codeofconduct/
