Python3: Added initialization of keeper variables for generators too.
Python3: Added initialization of keeper variables for generators too.

* Otherwise the C++ compiler will give false warnings about using not
  initialized values.

kayhayen/Nuitka,kayhayen/Nuitka,kayhayen/Nuitka,kayhayen/Nuitka,tempbottle/Nuitka,wfxiang08/Nuitka,wfxiang08/Nuitka,tempbottle/Nuitka,tempbottle/Nuitka,tempbottle/Nuitka,wfxiang08/Nuitka,wfxiang08/Nuitka