Or maybe you are not listening to what I am saying. It would only take effect for arguments, which have default value.
So. dict().__setitem__(key, NotGiven) type(NotGiven) Exception(NotGiven) getattr(NotGiven, name) Ok, maybe there are some crucial functions, which have argument defaults. But again, there is another solution then, implement efficient decorator in standard library, maybe as part of sentinels, maybe as part of your PEP, maybe separately. I never said that it isn’t hard to write low-level python code. I will do that when the time is right for me. And I am not claiming that it is possible. If you read my language, all of my doubts are clearly expressed. You just seem to read everything as black and white even when it is not so. However, such statements are in no way valid arguments in such discussion. If my idea is not optimal, not necessary, no-one needs it or any other valid responses, why it is not a good one - I can accept it. But commenting that “it makes no sense” without properly explaining to me why after giving it some thought - it’s not fair. Also, if you looked at things from a bit more positive perspective, maybe you could come up with some nice new ways how it could be done. Maybe not exactly what I am proposing, but some alternative, which would make it work. Most likely something much better than I am proposing. After all, I am trying to see how your PEP can be improved, because if it could be used in all cases, where None can be, then at least to me, it would be a no-brainer to use it instead and to adapt it as best practice. DG > On 23 Jul 2023, at 07:35, Chris Angelico <ros...@gmail.com> wrote: > > On Sun, 23 Jul 2023 at 14:08, Dom Grigonis <dom.grigo...@gmail.com> wrote: >> >> IT IS AN OBJECT. Never said otherwise. > > One that you can't do any of the operations I described. There is no > way to use it as an object. > >> `inspect.getcallargs` can seemingly be modified for such behaviour. I just >> wrote a decorator, which does what I proposed using `inspect` module for a >> chosen sentinel value. The issue is that it would be a bottleneck if used on >> any callable, which is continuously used. `inspect.getcallargs`, >> `signature`, `getfullargspec` are very expensive. >> >> If that can be done, theoretically it should be able to be done at lower >> level as well. After all, behaviour of it should be modelled after what is >> happening at the function call. >> > > Since you clearly are not listening to the discussion, I will leave > you with one final recommendation: Write some code. Don't just claim > that it's possible; write actual code that makes it happen. You will > discover exactly how hard it is. If I am wrong, you will be able to > PROVE that I am wrong, instead of merely claiming it. > > 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/TPY2JHOBXUQIRNRYUUBUX46Y3HS4GQVK/ > Code of Conduct: http://python.org/psf/codeofconduct/ _______________________________________________ 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/RTXRKZWWTRPGYHQTIRNGB57RMRFGWDQR/ Code of Conduct: http://python.org/psf/codeofconduct/
