code: def test_make_sure_abstract_methods_are_not_implemented_in_base(self):
      classifier = ProblemTransformationBase()
  
      with self.assertRaises(NotImplementedError):
          classifier.fit([], [])
  
      with self.assertRaises(NotImplementedError):
          classifier.predict([])
  
imports: import itertools
  import unittest
  import numpy
  import scipy.sparse
  from builtins import range
  from builtins import zip
  from sklearn.base import BaseEstimator
  from .test_utils import SPARSE_MATRIX_FORMATS
  from ..base import ProblemTransformationBase
label_desc: Use image node_id 7 for calling the ProblemTransformationBaseTest obj's underlying member method code with example usage: obj.test_make_sure_abstract_methods_are_not_implemented_in_base() without return types