On Thu, Jan 31, 2013 at 7:45 PM, D. S. McNeil <dsm...@gmail.com> wrote:
>>> As far as I understand, Python 3 will allow to achieve the same using
>>> the natural syntax `def f(x: int, y: float) : ...`, with flexibility
>>> on what "type" can be.
>>
>> Unfortunately, type declarations, with that syntax, was *proposed* for
>> Python 3, but then soundly rejected by Guido as "too ugly".
>
> I have good news -- I think you're misreading the current status:
>
> Python 3.3.0 (v3.3.0:bd8afb90ebf2, Sep 29 2012, 01:25:11)
> [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
>>>> def f(a: int, b: float) -> (float, str):
> ... pass
> ...
>>>> f.__annotations__
> {'b': <class 'float'>, 'return': (<class 'float'>, <class 'str'>),
> 'a': <class 'int'>}
>
Ah, interesting. I guess Guido just didn't like part of the
notation. Note that the declaration doesn't actually do anything:
>>> def f(a: int, b: float) -> (float, str):
... print(a,b)
...
>>> f(2.5,3)
2.5 3
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