code: def test_euclidean(self):
      self.assertAlmostEqual(
          euclidean(self.a, self.b),
          tc.distances.euclidean(self.a, self.b),
      )
      self.assertAlmostEqual(
          (2 * 2 + 2 * 2 + 2 * 2) ** 0.5,
          tc.distances.euclidean(self.av, self.bv),
      )
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import copy
  import unittest
  import numpy
  import turicreate
  from turicreate.toolkits._main import ToolkitError
  from collections import Counter
  import sys
label_desc: Use image node_id 2 for calling the StandardDistancesTest obj's underlying member method code with example usage: obj.test_euclidean() without return types