code: def euclidean(a, b):
      return squared_euclidean(a, b) ** 0.5
  
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 5 for calling a global function with example usage: euclidean(a, b) and returns: unknown