code: def setUpClass(self):
      self.a = {"a": 0.5, "b": 0.7}
      self.b = {"b": 1.0, "c": 0.1, "d": 0.5}
      self.av = [3, 4, 1]
      self.bv = [1, 2, 3]
      self.al = ["a", "b", "b", "c"]
      self.bl = ["a", "b"]
  
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 1 for calling the StandardDistancesTest obj's underlying member method code with example usage: obj.setUpClass() without return types