To be honest, several of the gertbot.py functions seem to be under development and may not have been validated.
Apart from some code which was clearly released as 'alpha' code and flagged as having untested routines, all python drivers have been tested.
The only error found thus far is in a DCC routine where the board accidentally was already in the right 'state'.
Anyone have this nut cracked with Python?
Several people have used the python routines without trouble.
There are DCC users, stepper motor users and brushed motor users.
As you report no result whatsoever: do you use Python-3? it will not work with Python-2.