I talked about this before but I have slightly different suggestions list[type] becomes [type] tuple[type1, type2, type3] becomes (type1, type2, type3) dict[type1, type2] becomes {type1: type2} set[type] becomes {type} Callable[[type1], type2] becomes (type1) -> type2 class MyTypedDict(TypedDict): name: str age: NotRequired[int] becomes {name: str, age: NotRequired[int]}
Unfortunately, the steering committee rejected the callable syntax last year even though I think the proposal was elegant and a lot of efforts went into it. Maybe they will reconsider it in the future with some modifications? I don’t know. Abdulla Sent from my iPhone > On 1 Jul 2022, at 7:17 AM, Paul Bryan <pbr...@anode.ca> wrote: > > >> >> On Tue, 2022-05-31 at 21:08 +0000, kevinlu1...@gmail.com wrote: >> >> On the theme of the addition of pip operators to indicate union, I was >> wondering what people think of using the following shortcuts for type hints. > >> * type[] be a short-hand for List[type] > I'm at -½ on this idea. Using list[type] isn't really problematic for me > today. > >> * [type1, type2, type3] be a shorthand for Tuple[type1, type2, type3] > I think this would problematic because today it already validly expresses a > list containing the elements: type1, type2 and type3. And all it saves is 5 > characters: `tuple`. > >> * similar ideas for dictionaries and callables with (perhaps with >> javascript-like arrow notations?) > > I'm +1 for the idea of a more intuitive callable type hint syntax. > >> I just think something like this would be easier to read. For example, a lot >> of functions that return tuples generally are immediately unpacked when it's >> used, so I think this is a more clear and concise way of stating that this >> is that it returns three elements: an element of type1, an element of type2 >> and an element of type3. In other words, the fact that it's a tuple does not >> matter much. > > _______________________________________________ > 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/NTAPUM62BK6V7XXMJNR6AXS4TQMMQZRT/ > Code of Conduct: http://python.org/psf/codeofconduct/
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