code: def test_alpha_auto(self):
      model1 = self.class_(
          corpus, id2word=dictionary, alpha="symmetric", passes=10
      )
      modelauto = self.class_(
          corpus, id2word=dictionary, alpha="auto", passes=10
      )
  
      # did we learn something?
      self.assertFalse(all(np.equal(model1.alpha, modelauto.alpha)))
  
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 4 for calling the TestLdaModel obj's underlying member method code with example usage: obj.test_alpha_auto() without return types