[Python-ideas] Trial balloon: adding variable type declarations in support of PEP 484

[Greg Ewing]

אלעזר wrote:
> class Starship(tuple):
>     damage: int = 0  
>     captain: str  = "Kirk"
> 
> Is an obvious syntax for 
> 
>     Starship = NamedTuple('Starship', [('damage', int), ('captain', str)])

But the untyped version of that already has a meaning --
it's a tuple subclass with two extra class attributes
that are unrelated to its indexable items.

I thought that type annotations weren't meant to change
runtime semantics?

-- 
Greg