code: def test_normalize_per_object(self):
      norm = haralick.normalized_per_object(gray4, labels)
      self.assertTrue((norm == gray).all())
  
imports: import unittest
  import centrosome.haralick
  import numpy
label_desc: Use image node_id 3 for calling the TestHaralick obj's underlying member method code with example usage: obj.test_normalize_per_object() without return types