On Sat, Jan 08, 2022 at 12:32:35PM +0200, Serhiy Storchaka wrote: > 08.01.22 01:59, jack.jan...@cwi.nl пише: > >> If I can make a wild suggestion: why not create a little language for > >> type specifications? > > We need a way to define aliases. For example, write: > > Data = Mapping[str, Sequence[Tuple[int, T]]] > Factory = Callable[[int, Iterable[str]], Optional[list[Data[T]]]]
Can't we already do that? https://docs.python.org/3/library/typing.html#type-aliases Type aliases are great. But there are times where we don't want to write an alias when we can just write the type in-place, just as there are times where we don't want to write a function when we can just use an in-place expression. -- Steve _______________________________________________ Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-le...@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/ZRYSXMF2HRC5HXIZLQ4FTSL44PF6TXPS/ Code of Conduct: http://python.org/psf/codeofconduct/
