Comment # 2 on bug 1184340 from Max Lin

It looks like because of python2-matplotlib-tk is recommended to install to
your system, digging into it, gnuhealth -> python3-matplotlib ->
python2-matplotlib-tk - was Recommands:(python-matplotlib-tk if tk) in the
python3-matplotlib, that should be a python-matplotlib.

python-matplotlib is a SLE-base package, it may need to be fixed from SLE side.