class_docstr: Merges networks from multiple CFF files into one new CFF file.
  
  Example
  -------
  
  >>> import nipype.interfaces.cmtk as cmtk
  >>> mrg = cmtk.MergeCNetworks()
  >>> mrg.inputs.in_files = ['subj1.cff','subj2.cff']
  >>> mrg.run()                  # doctest: +SKIP
code: def _list_outputs(self):
      outputs = self._outputs().get()
      _, name, ext = split_filename(self.inputs.out_file)
      if not ext == ".cff":
          ext = ".cff"
      outputs["connectome_file"] = op.abspath(name + ext)
      return outputs
  
imports: import os
  import os.path
  import datetime
  import string
  import networkx
  from ...utils.filemanip import split_filename
  from ..base import BaseInterfaceInputSpec, traits, File, TraitedSpec, InputMultiPath, isdefined
  from .base import CFFBaseInterface, have_cfflib
label_desc: Use image node_id 2 for calling the MergeCNetworks obj's underlying member method code with example usage: obj._list_outputs() and returns: outputs