[Python-ideas] Re: Typescript-Like Notational Shortcuts

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 wrote:



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On Tue, 2022-05-31 at 21:08 +0000, kevinlu1248@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.

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* 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.

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* [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`.

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* 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.

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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.

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