prep (
        mols,
        addHFunc=None,
        hisScheme=None,
        mutateMSE=None,
        delSolvent=None,
        delIons=None,
        delLigands=None,
        delAltLocs=None,
        incompleteSideChains=None,
        nogui=None,
        rotamerLib=None,
        rotamerPreserve=None,
        **kw,
        )

ChimeraExtension.py

gui.py

prefs.py