class_docstr: A unittest class for testing the GaussianNoise postprocessor.
code: def test_set_params(self):
      gan = GaussianNoise(scale=0.1)
      gan.set_params(scale=0.2)
      self.assertEqual(gan.scale, 0.2)
  
file_path: adversarial-robustness-toolbox/tests/defences/test_gaussian_noise.py
imports: import logging
  import unittest
  import numpy
  from art.defences.postprocessor import GaussianNoise
  from art.utils import load_dataset
  from tests.utils import master_seed, get_image_classifier_kr_tf, get_image_classifier_kr_tf_binary
label_desc: Use image node_id 6 for calling the TestGaussianNoise obj's underlying member method code with example usage: obj.test_set_params() without return types