code: def test_euclidean_distance():
      x = np.array([0, 1, 2, 3])
  
      y = np.array([1, 2, 3, 4])
  
      assert general.euclidean_distance(x, y) == 2.0
  
imports: import numpy
  from opytimizer.math import general
label_desc: Use image node_id 1 for calling a global function with example usage: test_euclidean_distance() without return types