code: def test_at_100(self):
      threshold = binarize.cutoff_score_at_top_proportion(
          self.scores, 1.0
      )
      self.assertEqual(threshold, 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 4 for calling the Test_cutoff_score_at_top_proportion obj's underlying member method code with example usage: obj.test_at_100() without return types