code: def test_random_state_backward_compatibility(self):
      # load a model saved using a pre-0.13.2 version of Gensim
      pre_0_13_2_fname = datapath("pre_0_13_2_model")
      model_pre_0_13_2 = self.class_.load(pre_0_13_2_fname)
  
      # set `num_topics` less than `model_pre_0_13_2.num_topics` so that `model_pre_0_13_2.random_state` is used
      model_topics = model_pre_0_13_2.print_topics(
          num_topics=2, num_words=3
      )
  
      for i in model_topics:
          self.assertTrue(isinstance(i[0], int))
          self.assertTrue(isinstance(i[1], str))
  
      # save back the loaded model using a post-0.13.2 version of Gensim
      post_0_13_2_fname = get_tmpfile(
          "gensim_models_lda_post_0_13_2_model.tst"
      )
      model_pre_0_13_2.save(post_0_13_2_fname)
  
      # load a model saved using a post-0.13.2 version of Gensim
      model_post_0_13_2 = self.class_.load(post_0_13_2_fname)
      model_topics_new = model_post_0_13_2.print_topics(
          num_topics=2, num_words=3
      )
  
      for i in model_topics_new:
          self.assertTrue(isinstance(i[0], int))
          self.assertTrue(isinstance(i[1], str))
  
imports: import logging
  import numbers
  import os
  import unittest
  import copy
  import numpy
  from numpy.testing import assert_allclose
  from gensim.corpora import mmcorpus, Dictionary
  from gensim.models import ldamodel, ldamulticore
  from gensim import matutils, utils
  from gensim.test import basetmtests
  from gensim.test.utils import datapath, get_tmpfile, common_texts
label_desc: Use image node_id 19 for calling the TestLdaModel obj's underlying member method code with example usage: obj.test_random_state_backward_compatibility() without return types