I've been getting "SystemError: NULL result without error in PyObject_Call"
when trying to perform a parallel grid search (with logistic regression,
n_jobs>=2) with a very large matrix.
So it comes down to http://bugs.python.org/issue17560. It would be good if
we could make the error a little less opaque.
On Tue, Aug 13, 2013 at 5:59 PM, Lars Buitinck <l.j.buiti...@uva.nl> wrote:
> 2013/8/13 A <4rk....@gmail.com>:
> > On another note, n_jobs > 1 for SGDClassifier seems to return
> SystemError.
> > Is this a known issue?
> > Traceback/output is as :
> > ---------------------------------------------------------------
> > 2992 labels to train on.
> [snip]
> > SystemError: NULL result without error in PyObject_Call
>
> I've never seen this one, but SGD isn't really built for massively
> multiclass problems, so this may be a memory issue. How many features
> do you have?
>
> --
> Lars Buitinck
> Scientific programmer, ILPS
> University of Amsterdam
>
>
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