code: def test_euclid_transform(self):
      self.assert_invalid_distance_function(
          sofm.neg_euclid_distance,
          np.array([[1, 2, 3]]),
          np.array(
              [
                  [1, 2, 3],
                  [1, 1, 1],
                  [0, 0, 1],
                  [0, 1, 2],
              ]
          ).T,
          np.array([[0, -math.sqrt(5), -3, -math.sqrt(3)]]),
      )
  
imports: import math
  import numpy
  from neupy import algorithms
  from neupy.exceptions import WeightInitializationError
  from neupy.algorithms.competitive import sofm
  from neupy.algorithms.competitive.neighbours import gaussian_df
  from base import BaseTestCase
label_desc: Use image node_id 2 for calling the SOFMDistanceFunctionsTestCase obj's underlying member method code with example usage: obj.test_euclid_transform() without return types