code: def test2(self):
      # Parsing trivial file with some comments in the data section.
      self._test(test5)
  
imports: import datetime
  import os
  import sys
  from os.path import join
  from io import StringIO
  import numpy
  from numpy.testing import assert_array_almost_equal, assert_array_equal, assert_equal, assert_
  from pytest import raises
  from scipy.io.arff import loadarff
  from scipy.io.arff._arffread import read_header, ParseArffError
label_desc: Use image node_id 2 for calling the TestData obj's underlying member method code with example usage: obj.test2() without return types