code: def test_symmetry(self):
      check_distance_symmetry(self, self.cosine)
  
file_path: NearPy/tests/distances_tests.py
imports: import numpy
  import scipy
  import unittest
  from nearpy.distances import EuclideanDistance, CosineDistance, ManhattanDistance
label_desc: Use image node_id 2 for calling the TestCosineDistance obj's underlying member method code with example usage: obj.test_symmetry() without return types