On Mon, Mar 18, 2019 at 9:34 AM Steven D'Aprano <st...@pearwood.info> wrote: > > On Mon, Mar 18, 2019 at 01:13:29AM +1100, Chris Angelico wrote: > [...] > > Yes, it will. Can you determine whether some code does this? Can you > > recognize what kind of object is on the left of a percent sign? > > Remember, it quite possibly won't be a literal. > > I don't understand whether your question is asking if Francis > *personally* can do this, or if it is possible in principle. > > If the later, then inferring the type of expressions is precisely the > sort of thing that mypy (and others) do.
Kinda somewhere between. Francis keeps saying "oh, just make a source code rewriter", and I'm trying to point out that (1) that is NOT an easy thing to do - sure, there are easy cases, but there are also some extremely hard ones; and (2) even if it could magically be made to work, it would still have (and cause) problems. 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/
