code: def compute_ligand_mol(pdb_subdir, pdb_code):
      ligand_file = os.path.join(pdb_subdir, "%s_ligand.pdb" % pdb_code)
      mol = Chem.MolFromPDBFile(str(ligand_file))
      return mol
  
imports: import os
  import numpy
  import deepchem
  from rdkit import Chem
label_desc: Use image node_id 1 for calling a global function with example usage: compute_ligand_mol(pdb_subdir, pdb_code) and returns: mol