def func(x: int, y: int, f: (int, int) -> int) -> int:
return f(x, y)
print(func(1, 4, (x, y) -> x + y)) #Output: 5
I think we can still use the same syntax for both typing.Callable and lambda.
It would act like Callable if it comes after the “:” in annotations or after
the “->” in function return annotation. After assignment or using it directly
as an argument, then it acts like lambda.
func: (str, str) -> None = (text1, text2) -> print(text1 + text2)
Same syntax, but communicates two different things. I don’t see any problem
with this.
func: (str, str) -> None = (text1, text2) => print(text1 + text2) is not bad
either to be honest.
> On 14 Feb 2021, at 12:23 PM, Paul Sokolovsky <[email protected]> wrote:
>
> I for one can't parse that (didn't have a morning coffee, but suspect
> there's a typo/thinko). Btw, I'm not sure about function values, but
> IMHO, type notation should always use parens for arguments, e.g. "(int)
> -> int".
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