code: def setUp(self):
      self.target = utils.ParametersLink.from_param_props(
          # TODO(niboshi): Use different shapes
          ((2, 3), (2, 3), (2, 3))
      )
  
      self.noise_value = np.random.normal(
          loc=0,
          scale=np.sqrt(self.eta / np.power(1, 0.55)),
          size=(2, 3),
      ).astype(np.float32)
  
file_path: chainer/tests/chainer_tests/optimizer_hooks_tests/test_gradient_noise.py
imports: import itertools
  import unittest
  import mock
  import numpy
  from chainer import optimizer_hooks
  from chainer import optimizers
  from chainer import testing
  import utils
label_desc: Use image node_id 1 for calling the TestGradientNoise obj's underlying member method code with example usage: obj.setUp() without return types