## No PyRosetta > This note will quickly become outdated once Fritz enters the scene. Fragmenstein can import without PyRosetta, but it will not be able to perform any minimisation. Only `Monster` will work. If `Igor` is imported, it will not be able to perform any minimisation and crash with the final outputs being a bit hidden. ```python from fragmenstein import Victor # RuntimeWarning: PyRosetta is not installed. A mock object is loaded. Any calls will fail. from fragmenstein import __version__ as fragn_version print(fragn_version) # 0.9.12.6 ``` A way around it is to create a subclass of `Victor` that overrides the methods that call `Igor`. ```python from rdkit import Chem class Wictor(Victor): """ This Victor does not call Igor """ def _calculate_combination_thermo(self): # override igor. pass def _calculate_placement_thermo(self): # override igor. pass def post_monster_step(self): # this is a black overridable methods that will be the last thing called self.minimized_mol: Chem.Mol = self.monster.positioned_mol self.minimized_pdbblock: str = self.unminimized_pdbblock ``` ```python Wictor = ... # see above from fragmenstein.demo import Mac1 Wictor.capture_rdkit_log() #Wictor.enable_stdout() Wictor.error_to_catch = () wicky = Wictor(hits=Mac1.get_n_filtered_mols(2), pdb_block=Mac1.get_template(), ) wicky.combine() wicky.to_nglview() ```