code: def setUp(self):
      self.corpus = MmCorpus(datapath("testcorpus.mm"))
      self.class_ = ldamodel.LdaModel
      self.model = self.class_(
          common_corpus,
          id2word=common_dictionary,
          num_topics=2,
          passes=100,
      )
  
imports: import logging
  import unittest
  from gensim import matutils
  from scipy.sparse import csr_matrix
  import numpy
  import math
  from gensim.corpora.mmcorpus import MmCorpus
  from gensim.models import ldamodel
  from gensim.test.utils import datapath, common_dictionary, common_corpus
label_desc: Use image node_id 1 for calling the TestHellinger obj's underlying member method code with example usage: obj.setUp() without return types