[Python-ideas] Annotations (and static typing)

[Andrea Censi]

On Wed, Aug 20, 2014 at 12:51 PM, Alexander Belopolsky
<alexander.belopolsky at gmail.com> wrote:
>> What can one do with an annotation that one cannot do with a decorator?
>
>
> Spell "returns" in two characters.

True. (Is there any alternative to using a "returns" argument in the decorator?)

We can also compile another list:

What can one do with a decorator that cannot be done with annotations?

1)  Comment out type checking with one character.

(Admittedly, this is thinking short term --- it's a limitation of the
editors rather than the language itself. We can imagine that
language-aware editors of the future will be more flexible. For
example, the editor would have a shortcut to hide or disable type
annotations.)

2) Easily parse (with your eyes) the function signature without having
to think about types.

...

A.