[Numpy-discussion] Tests 32/64 bits

Robert Kern robert.kern@gmail....
Mon Apr 7 20:36:39 CDT 2008


On Mon, Apr 7, 2008 at 6:29 PM, Fernando Perez <fperez.net@gmail.com> wrote:
> On Mon, Apr 7, 2008 at 4:04 PM, Robert Kern <robert.kern@gmail.com> wrote:
>
>  >  >  On 32 bits, 869 are found and on Fedora x86_64, it's 863.  Above is
>  >  >  the difference (requested by rkern).
>  >
>  >  I think this is fine. The different arises because of extra scalar
>  >  types on the 32 bit system that don't show up on the AMD system,
>  >  presumably float96 and complex192. Check numpy.sctypes for the
>  >  difference.
>
>  - complex192 isn't on the 64bit box, but complex256 is, so that keeps
>  the number of tests for that type equal.
>
>  - float96 -> float128, again no change in test count
>
>  - for some reason, the 32-bit box gives
>   'int': [<type 'numpy.int8'>,
>          <type 'numpy.int16'>,
>          <type 'numpy.int32'>,
>          <type 'numpy.int32'>,
>          <type 'numpy.int64'>],
>
>  so there's a repeated int32 type listed there.  I don't know what that
>  means, but obviously it produces extra tests (possibly redundant?)

Definitely redundant, but harmless. The code that generates these
lists is numpy/core/numerictypes.py:_set_array_types(). The redundant
ones are dtype('p').type and dtype('P').type. For some reason these do
not compare equal to numpy.{u}int32.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless
enigma that is made terrible by our own mad attempt to interpret it as
though it had an underlying truth."
 -- Umberto Eco


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