[Numpy-discussion] numpy 1.10.1 reduce operation on recarrays

[Charles R Harris]

On Fri, Oct 16, 2015 at 11:58 AM, <josef.pktd at gmail.com> wrote:

> was there a change with reduce operations with recarrays in 1.10 or 1.10.1?
>
> Travis shows a new test failure in the statsmodels testsuite with 1.10.1:
>
> ERROR: test suite for <class
> 'statsmodels.base.tests.test_data.TestRecarrays'>
>
>   File
> "/home/travis/miniconda/envs/statsmodels-test/lib/python2.7/site-packages/statsmodels-0.8.0-py2.7-linux-x86_64.egg/statsmodels/base/data.py",
> line 131, in _handle_constant
>     const_idx = np.where(self.exog.ptp(axis=0) == 0)[0].squeeze()
> TypeError: cannot perform reduce with flexible type
>
>
> Sorry for asking so late.
> (statsmodels is short on maintainers, and I'm distracted)
>
>
> statsmodels still has code to support recarrays and structured dtypes from
> the time before pandas became popular, but I don't think anyone is using
> them together with statsmodels anymore.
>
>
There were several commits dealing both recarrays and ufuncs, so this might
well be a regression.

Chuck
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