code: def smiles2graph(smiles_string, khop=1):
      """
      Converts SMILES string to graph Data object
      :input: SMILES string (str)
      :return: graph object
      """
      mol = Chem.MolFromSmiles(smiles_string)
      return rdkit_mol2graph(mol, khop)
  
imports: import numpy
  import rdkit
  from rdkit import Chem
  from rdkit.Chem import AllChem
  import rdkit.Chem.rdPartialCharges
  from ogb.utils.features import allowable_features, atom_to_feature_vector, atom_feature_vector_to_dict, bond_feature_vector_to_dict
  from local_feature import bond_to_feature_vector, get_bond_feature_dims
  from copy import deepcopy
  import hashlib
label_desc: Use image node_id 9 for calling a global function with example usage: smiles2graph(smiles_string, khop) and returns: rdkit_mol2graph