how to debug python extensions.

Hi, I have a question that how to debug python extensions. for example how
to debug 4.3.3.2_build/instdir/program/pythonscript.py,
Now i debug the file by write debug information in log.txt, but it's too
trouble.
src/pyuno/README file say that
To have much joy debugging python extensions you need to:
  a) edit pythonloader.py in your install setting DEBUG=1 at the top
  b) touch pyuno/source/module/pyuno_runtime.cxx and 'make debug=true' in
pyuno

Then you'll start to see your exceptions on the console instead of them
getting lost at the UNO interface.
I have done it like this , but it's useless.

another question
in src/scripting/source/pyprov/pythonscript.py.
why the parameters of out and outindex have not been used.

​waiting for you help, thank you!