Python is DOOMED! Again!

Thu Jan 22 17:27:26 EST 2015

On Thu, Jan 22, 2015 at 2:12 PM, Ian Kelly <ian.g.kelly at gmail.com> wrote:
>>> def adder(a,b): return a+b
>>>>>> This is one of the pythonic idioms that help with polymorphic functions. Is
>>> there a proposal for providing hinting for these?
>>>> You can use TypeVar for that.
>>>> T = TypeVar('T')
>>>> def adder(a: T, b: T) -> T:
>> return a + b
>>>> I'm not thrilled about having to actually declare T in this sort of
>> situation, but I don't have a better proposal.
>> Hmm, but also that hinting doesn't cover cases like adder(12, 37.5)
> where two different types can be passed, and the return type could be
> either. I think for full generality you would just have to forgo
> hinting on this function.

Or use Any, which is basically the same thing:
def adder(a: Any, b: Any) -> Any:
 return a + b
Chris