code: def test_H9(self):
      h = haralick.Haralick(gray, labels, 0, 1, nlevels=4)
      self.assertAlmostEqual(h.H9()[0], 1.8637, 4)
  
imports: import unittest
  import centrosome.haralick
  import numpy
label_desc: Use image node_id 13 for calling the TestHaralick obj's underlying member method code with example usage: obj.test_H9() without return types