Use python-scipy together with python-numpy Debian packages and you will get the most recent NumPy, SciPy and f2py working well. If not, please report a bug against any of those packages.
python-scipy is part of the DPMT.
Debian packages now
source packages:
builds: python-scipy
compatible with python-numpy
recommended
builds: python-scipy-core
compatible with deprecated python-numeric
deprecated