code: def _test_parcel_analysis_error(**kw):
      con_imgs, parcel_img = make_fake_data()
      return ParcelAnalysis(con_imgs, parcel_img, **kw)
  
file_path: nipy/nipy/algorithms/group/tests/test_parcel_analysis.py
imports: import os
  import numpy
  import pytest
  from numpy.testing import assert_array_equal
  from ....core.image.image_spaces import make_xyz_image, xyz_affine
  from ..parcel_analysis import ParcelAnalysis, _smooth_image_pair, parcel_analysis
label_desc: Use image node_id 8 for calling a global function with example usage: _test_parcel_analysis_error() and returns: ParcelAnalysis