[Python-ideas] Proposal to extend PEP 484 (gradual typing) to support Python 2.7

[David Mertz]

>
> > An equivalent way to write this in Python 2 is the following:
> >
> >     def embezzle(self, account, funds=1000000, *fake_receipts):
> >         # type: (str, int, *str) -> None
> >         """Embezzle funds from account using fake receipts."""
> >         <code goes here>
>
> By using comments, the annotations would not be available at
> runtime via an .__annotations__ attribute and every tool would
> have to implement a parser for extracting them.
>
> Wouldn't it be better and more in line with standard Python
> syntax to use decorators to define them ?
>
>     @typehint("(str, int, *str) -> None")
>     def embezzle(self, account, funds=1000000, *fake_receipts):
>         """Embezzle funds from account using fake receipts."""
>         <code goes here>
>

I really like MAL's variation much better.  Being able to see
.__annotations__ at runtime feels like an important feature that we'd give
up with the purely comment style.


-- 
Keeping medicines from the bloodstreams of the sick; food
from the bellies of the hungry; books from the hands of the
uneducated; technology from the underdeveloped; and putting
advocates of freedom in prisons.  Intellectual property is
to the 21st century what the slave trade was to the 16th.
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