class_docstr: Regression test for code exhibiting various optimization errors.
  
  This test case is based on code by Sigurd Spieckermann.
class_docstr_tok: ["Regression","test","for","code","exhibiting","various","optimization","errors",".","This","test","case","is","based","on","code","by","Sigurd","Spieckermann","."]
code: def setUp(self):
      self.rng = np.random.RandomState(utt.fetch_seed())
  
imports: from __future__ import absolute_import, print_function, division
  import numpy
  import unittest
  import theano
  from theano import config
  from theano import tensor
  from theano.scan_module.scan_op import Scan
  from theano.tests import unittest_tools
label_desc: Use image node_id 1 for calling the TestGaussNewton obj's underlying member method code with example usage: obj.setUp() without return types