code: def compute_contact_centroid(
      molecular_complex: Any, cutoff: float = 4.5
  ) -> np.ndarray:
      """Computes the (x,y,z) centroid of the contact regions of this molecular complex.
  
      For a molecular complex, it's necessary for various featurizations
      that compute voxel grids to find a reasonable center for the
      voxelization. This function computes the centroid of all the contact
      atoms, defined as an atom that's within `cutoff` Angstroms of an
      atom from a different molecule.
  
      Parameters
      ----------
      molecular_complex: Object
          A representation of a molecular complex, produced by
          `rdkit_util.load_complex`.
      cutoff: float, optional
          The distance in Angstroms considered for computing contacts.
      """
      fragments = reduce_molecular_complex_to_contacts(
          molecular_complex, cutoff
      )
      coords = [frag[0] for frag in fragments]
      contact_coords = merge_molecules_xyz(coords)
      centroid = np.mean(contact_coords, axis=0)
      return centroid
  
imports: import os
  import logging
  import itertools
  import numpy
  from io import StringIO
  from deepchem.utils.pdbqt_utils import pdbqt_to_pdb
  from deepchem.utils.pdbqt_utils import convert_mol_to_pdbqt
  from deepchem.utils.pdbqt_utils import convert_protein_to_pdbqt
  from deepchem.utils.geometry_utils import compute_pairwise_distances
  from deepchem.utils.geometry_utils import compute_centroid
  from deepchem.utils.fragment_utils import MolecularFragment
  from deepchem.utils.fragment_utils import MoleculeLoadException
  from typing import Any, List, Sequence, Tuple, Set, Optional, Dict, Union
  from deepchem.utils.typing import OneOrMany, RDKitMol
label_desc: Use image node_id 12 for calling a global function with example usage: compute_contact_centroid(molecular_complex, cutoff) and returns: centroid