Comment # 8 on bug 1200520 from Ralf K���lmel

the problem was a not suitable macros file which is belonging to Leap 15.3.
i don't think that zypp needs a patch.

There is another problem with this macros file, that the introduced python
variable is not used and it assumes an executable with name python.
if the legacy packages python/python-base are deinstalled, there is no python
executable provided through the python3 package.
The python3 installation should create a python link via update-alternatives.