Numpy & dh_python2

[Thomas Kluyver <takowl@gmail.com>]

I was looking at packaging numpy for Python 3 (bug #601593, LP
#795605). As a step towards this, I was trying to convert it from
pysupport to dh_python2, following the 'transition to dh_python2'
guide. But I hit a section that I don't really understand, in
override_dh_pysupport:

# add to public modules list ;\
echo $$installedfile >>
./debian/python-numpy/usr/share/python-support/python-numpy.public ;\

What's the significance of the public modules list? Is there an
equivalent for dh_python2?

Thanks,
Thomas