On Thu, Oct 29, 2009 at 4:41 PM, Robert Bradshaw
<[email protected]> wrote:
> On Oct 29, 2009, at 4:22 PM, Lisandro Dalcin wrote:
>
>> Sorry for the late reply..
>>
>> On Wed, Oct 28, 2009 at 4:13 AM, Stefan Behnel <[email protected]>
>> wrote:
>>> Hi,
>>>
>>> most of the 'complex' tests currently fail in Py3.1 because
>>> complex.__repr__() became more correct. It now prints (-0-2j) for -
>>> (2j).
>>>
>>
>> Are you sure this is "more correct" ? What's the point of printing a
>> "0" for the real part?
>
> I had the same thought.
>
>> I really do not know what's going on there...
>> Enter your python prompt ant try to make it print a complex with a
>> single "0" for the real part, I was not able to do so...
>
> I'm confused too
>
> Python 3.0 (r30:67503, Jan 23 2009, 04:39:45)
> [GCC 4.2.4 (Ubuntu 4.2.4-1ubuntu3)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> str(-2j)
> '-2j'
>  >>> repr(-2j)
> '-2j'
>
> Perhaps it's a 3.1+ thing.

I installed python3.1.1 system-wide on sage.math.washington.edu just now:

wst...@sage:~$ python3.1
Python 3.1.1 (r311:74480, Oct 29 2009, 16:43:33)
[GCC 4.2.4 (Ubuntu 4.2.4-1ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> repr(-2j)
'-2j'
>>> str(-2j)
'-2j'



>
>>> Could someone who was involved in writing this code (Dag or
>>> Lisandro, I
>>> guess) please take a look
>>
>> It was Robert :-)
>>
>>> and decide a) if this is worth testing for, and
>>> b) if it's enough to fix the test or if the support in Cython also
>>> needs
>>> adaptation to match what Py3.1 prints?
>
> When I write
>
> cdef double complex z = -2j
> print z
>
> it converts z into a Python complex object, then prints it. We don't
> do any string conversion ourselves. If they changed the was repr
> works, the only thing I see to do is change the doctest depending on
> the Python version.
>
> - Robert
>
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>



-- 
William Stein
Associate Professor of Mathematics
University of Washington
http://wstein.org
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