code: def fit(self, mol1, mol2):
          
          return self.get_rmsd(mol1, mol2) < self._tolerance
docs: Fit two molecules.
  
          Args:
              mol1: First molecule. OpenBabel OBMol or pymatgen Molecule object
              mol2: Second molecule. OpenBabel OBMol or pymatgen Molecule object
  
          Returns:
              A boolean value indicates whether two molecules are the same.