class_docstr: Subdivides segmented ROI file into smaller subregions
  
  This interface implements the same procedure as in the ConnectomeMapper's
  parcellation stage (cmp/stages/parcellation/maskcreation.py) for a single
  parcellation scheme (e.g. 'scale500').
  
  Example
  -------
  
  >>> import nipype.interfaces.cmtk as cmtk
  >>> parcellate = cmtk.Parcellate()
  >>> parcellate.inputs.freesurfer_dir = '.'
  >>> parcellate.inputs.subjects_dir = '.'
  >>> parcellate.inputs.subject_id = 'subj1'
  >>> parcellate.inputs.dilation = True
  >>> parcellate.inputs.parcellation_name = 'scale500'
  >>> parcellate.run()                 # doctest: +SKIP
code: def _gen_outfilename(self, ext, prefix="ROI"):
      return prefix + "_" + self.inputs.parcellation_name + "." + ext
  
imports: import os
  import os.path
  import shutil
  import numpy
  import nibabel
  import networkx
  from ...None import logging
  from ..base import BaseInterface, LibraryBaseInterface, BaseInterfaceInputSpec, traits, File, TraitedSpec, Directory, isdefined
  from .base import have_cmp
label_desc: Use image node_id 3 for calling the Parcellate obj's underlying member method code with example usage: obj._gen_outfilename(ext, prefix) and returns: unknown