code: def test_signal_extract_no_shared(self):
      # run
      iface.SignalExtraction(
          in_file=self.filenames["in_file"],
          label_files=self.filenames["label_files"],
          class_labels=self.labels,
          incl_shared_variance=False,
      ).run()
      # assert
      self.assert_expected_output(self.labels, self.base_wanted)
  
file_path: nipype/nipype/interfaces/tests/test_nilearn.py
imports: import os
  import numpy
  from ...testing import utils
  from ..None import nilearn
  from ...pipeline import engine
  import pytest
  import numpy.testing
label_desc: Use image node_id 2 for calling the TestSignalExtraction obj's underlying member method code with example usage: obj.test_signal_extract_no_shared() without return types