code: def test_average(self):
      score = average(self.scores)
      assert_allclose(score, np.array([1.5, 3.5, 5.5]))
  
imports: from __future__ import division
  from __future__ import print_function
  import os
  import sys
  import unittest
  import numpy
  from numpy.testing import assert_allclose
  from numpy.testing import assert_array_equal
  from numpy.testing import assert_equal
  from numpy.testing import assert_raises
  from sklearn.utils import shuffle
  from pyod.models.combination import aom
  from pyod.models.combination import moa
  from pyod.models.combination import average
  from pyod.models.combination import maximization
  from pyod.models.combination import median
  from pyod.models.combination import majority_vote
label_desc: Use image node_id 2 for calling the TestStatic obj's underlying member method code with example usage: obj.test_average() without return types