On Thu, Apr 25, 2019 at 1:51 PM Ivan Levkivskyi <levkivs...@gmail.com> wrote:
> TBH, I don't think it is so bad that it requires a new syntax. But I am > not strongly against it either. What I would like to add here is that if we > will go with the replacement: > > Callable[[X, Y], Z] becomes (X, Y) -> Z > > then we should also go with > > Union[X, Y] becomes X | Y > Tuple[X, Y] becomes (X, Y) > This may not be workable, because A[X, Y] and A[(X, Y)] have identical semantics in Python. So Tuple[(X, Y)] could either mean Tuple[X, Y] or Tuple[Tuple[X, Y]].
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