Ok... If the suggestion is trying concatenation of arbitrary objects that aren't strings, I go from thinking it's unnecessary to thinking it's a massively horrible idea.
On Fri, Apr 30, 2021, 11:43 PM Valentin Berlier <berlie...@gmail.com> wrote: > > the ONLY predicate that can be expressed about a single character is it > being a member of a subset of all Unicode characters > > You seem to be assuming that the comprehension would be purposefully > restricted to iterating over strings. The original author already provided > examples with predicates that don't involve checking for a subset of > characters. > > old = [0, 1, None, 2] > new = c"str(x + 1) for x in old if isinstance(x, int)" > > The existing "".join() idiom isn't restricted to iterating over an > existing string. You also have to account for nested comprehensions. > There's nothing that would prevent you from having arbitrary complexity in > string comprehension predicates, just like nothing prevents you from having > arbitrary predicates when you join a generator expression. > _______________________________________________ > 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/6T7NQT5HFVYSI3RHUCBDDCEWKJ7HDPZG/ > 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/JU46RLGQVB4HKR3PNKC6AJUV2NODNG6S/ Code of Conduct: http://python.org/psf/codeofconduct/
