On 10/16/2015 05:31 PM, josef.p...@gmail.com wrote: > > > On Fri, Oct 16, 2015 at 2:21 PM, Charles R Harris > <charlesr.har...@gmail.com <mailto:charlesr.har...@gmail.com>> wrote: > > > > On Fri, Oct 16, 2015 at 12:20 PM, Charles R Harris > <charlesr.har...@gmail.com <mailto:charlesr.har...@gmail.com>> wrote: > > > > On Fri, Oct 16, 2015 at 11:58 AM, <josef.p...@gmail.com > <mailto:josef.p...@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. > > > A bisection would be helpful. Also, open an issue. > > > > The reason for the test failure might be somewhere else hiding behind > several layers of statsmodels, but only started to show up with numpy 1.10.1 > > I already have the reduce exception with my currently installed numpy > '1.9.2rc1' > >>>> x = np.random.random(9*3).view([('const', 'f8'),('x_1', 'f8'), > ('x_2', 'f8')]).view(np.recarray) > >>>> np.ptp(x, axis=0) > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > File > "C:\programs\WinPython-64bit-3.4.3.1\python-3.4.3.amd64\lib\site-packages\numpy\core\fromnumeric.py", > line 2047, in ptp > return ptp(axis, out) > TypeError: cannot perform reduce with flexible type > > > Sounds like fun, and I don't even know how to automatically bisect. > > Josef
That example isn't the problem (ptp should definitely fail on structured arrays), but I've tracked down what is - it has to do with views of record arrays. The fix looks simple, I'll get it in for the next release. Allan _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org https://mail.scipy.org/mailman/listinfo/numpy-discussion
