def set_model_units(self):
    '\n        Every model needs its own set_model_units method\n\n        '
    raise Exception('IMPLEMENTATION ERROR: set_model_units must be overloaded')
Every model needs its own set_model_units method
def set_model_units(self):
    '\n        \n\n        '
    raise Exception('IMPLEMENTATION ERROR: set_model_units must be overloaded')