code: def test_proportion_less_than_zero(self):
      self.assertRaises(
          ValueError,
          binarize.cutoff_score_at_top_proportion,
          self.scores,
          -0.1,
      )
  
imports: from random import shuffle
  from unittest import TestCase
  import numpy
  from sklearn_evaluation.preprocessing import binarize
label_desc: Use image node_id 5 for calling the Test_cutoff_score_at_top_proportion obj's underlying member method code with example usage: obj.test_proportion_less_than_zero() without return types