Using Python 3.9, I'm used to declaring a tuple as t: tuple[A, B]. However, I now have a list[int], which is converted to a tuple. Obviously, the size of the list is only known at runtime. How do I declare a typing hint for the variable storing tuple(some_list))?
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Abhijit Sarkar
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3`tuple[int, ...]` – juanpa.arrivillaga Sep 14 '21 at 03:51
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I closed as a duplicate – juanpa.arrivillaga Sep 14 '21 at 03:53
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You cannot type hint a heterogenous, arbitrarily sized tuple. In general, arbitrarily sized tuples are a strange thing. They are meant to be used as [product types](https://en.wikipedia.org/wiki/Product_type) – juanpa.arrivillaga Sep 14 '21 at 03:53
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One thing you *can* do is use something like `tuple[Union[str, int, whatever], ...]` but that might now have the exact semantics you are hoping for – juanpa.arrivillaga Sep 14 '21 at 03:57
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Another option is `tuple[Any, ...]` which will also probably not have the exact semantics you're hoping for; anything will pass... – Jiří Baum Sep 14 '21 at 05:44