we announced it already on several channels, with the upcoming Cinema 4D R20 a few old features need to be removed to allow for future development.
Over at MAXON Labs we have released two plugins, that are supposed to help with this transition.
Search for usage of C.O.F.F.E.E. scripting language in scenes and C4D installations.
This will provide you easy access to the code, so it can be easily ported to Python.
Cinema 4D R20 won’t be able to load scenes saved with versions prior to R12. With the Scene Updater plugin one can easily scan for and convert such scene files, so they can still be loaded with R20.
Have a good time,
MAXON’s SDK Team