Re: [Python-Dev] return type of __complex__

2012年10月19日 09:46:54 -0700

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On 10/19/2012 11:56 AM, Benjamin Peterson wrote:
> 2012年10月19日 Tres Seaver <[email protected]>:
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>> 
>> On 10/19/2012 11:26 AM, Benjamin Peterson wrote:
>>> 2012年10月19日 Antonio Cuni <[email protected]>:
>>>> indeed, you are right. So I suppose that in pypy we could just
>>>> relax the check in cmath and be happy. Is there any chance that
>>>> this will be changed in 2.7 and/or 3.x?
>>> 
>>> Certainly 3.x, but not 2.7.
>> 
>> Why not 2.7? It is a perfectly-backward-compatible change: no 
>> currenly-working code could possibly break if cmath's restriction
>> was relaxed.
> 
> It's a new feature.
That is an assertion; I can dqually assert that the current over-strict
typechecking is a bug, because it doesn't conform to the semandics of
'comples_new'.
> Also, it's possible that someone is relying on it throwing for
> non-complex values.
No already working, non-contrived code would break, becuase float is
perfectly-promotable to complex.
Tres.
- -- 
===================================================================
Tres Seaver +1 540-429-0999 [email protected]
Palladion Software "Excellence by Design" http://palladion.com
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