Add challenge for variadic generics

[daya0576]

Add a new challenge for variadic generics for #60

Reference:

1. https://peps.python.org/pep-0646/
2. https://www.youtube.com/watch?v=hAj3nGzeSiQ

[laike9m]

Thanks for contributing this new challenge!

I see a few things that can be improved, for example, the code is missing ## End of your code ##, as described in:
https://github.com/laike9m/Python-Type-Challenges/blob/main/docs/Contribute.md#how-to-add-a-new-challange

Also, is it possible to remove the following code from question.py, as it seems to be part of the solution? Or we can put it in hints.md

T = TypeVar("T")
Ts = TypeVarTuple("Ts")

S1: TypeAlias = Tuple[float, int]
S2: TypeAlias = Tuple[*S1, str]

[daya0576]

Hi, thank you for your suggestions!

I have removed the code from question.py, but is it ok if the question code cannot run?

[laike9m]

Hi, thank you for your suggestions!

I have removed the code from question.py, but is it ok if the question code cannot run?

It's fine as long as it's valid Python code. We don't actually run the code after all.

[laike9m]

Could you also add a solution2.py using Python 3.12's new generic syntax? Thanks.

[daya0576]

Could you also add a solution2.py using Python 3.12's new generic syntax? Thanks.

Hi, I have added the solution2.py using the latest generic syntax. 🎄🎄🎄

[laike9m]

Thanks!