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Showing content from http://mail.python.org/pipermail/python-dev/2012-October/122246.html below:

[Python-Dev] return type of __complex__

[Python-Dev] return type of __complex__Maciej Fijalkowski fijall at gmail.com
Fri Oct 19 16:21:06 CEST 2012
On Fri, Oct 19, 2012 at 4:13 PM, Nick Coghlan <ncoghlan at gmail.com> wrote:
> On Fri, Oct 19, 2012 at 11:08 PM, Antonio Cuni <anto.cuni at gmail.com> wrote:
>> Is that the real intended behavior?
>
> Given the way complex numbers interact with floats generally,
> returning a complex number with no imaginary component as a floating
> point value seems legitimate and the checks in cmath overly strict.
> Otherwise you would get redundancy like:
>
>     def __complex__(self):
>         return complex(value)
>
> or
>
>     def __complex__(self):
>         return value + 0j
>
> More importantly, relaxing the checks in cmath is backwards
> compatible. while tightening up the checks in complex_new is not.
>
> Cheers,
> Nick.
>
> --
> Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
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Cool, can we get it for 2.7?
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