Bug#942106: python3.8 / pandas py2removal

[Graham Inggs <ginggs@debian.org>]

Hi Rebecca

> The binNMUs (to add python3.8 support) of pandas and statsmodels failed.
>  I think this will make them work (but haven't tried it):
>
> - Apply the (existing) #943418 fix to python-xlrd.
> - Build matplotlib, pandas and statsmodels in that order.  (ben can't
> work this out because the declared dependencies are circular, but I
> think the actual strict test dependencies only go that way.)

Thanks for the info.  I was able to build matplotlib first, then
python-xlrd, then pandas.
Pandas has already finished on some of the faster architectures
(amd64/i386/ppc64el/s390x) and I scheduled statsmodels there, but it
still fails.

I'm not sure if this is due to python 3.8, or the new numpy.

Regards
Graham