docstr: Perform sanity check to see if u_mass coherence works with LDA Model
docstr_tok: ["Perform","sanity","check","to","see","if","u_mass","coherence","works","with","LDA","Model"]
code: def testUMassLdaModel(self):
      """Perform sanity check to see if u_mass coherence works with LDA Model"""
      # Note that this is just a sanity check because LDA does not guarantee a better coherence
      # value on the topics if iterations are increased. This can be seen here:
      # https://gist.github.com/dsquareindia/60fd9ab65b673711c3fa00509287ddde
      CoherenceModel(
          model=self.ldamodel, corpus=self.corpus, coherence="u_mass"
      )
  
imports: import logging
  import unittest
  import multiprocessing
  from functools import partial
  import numpy
  from gensim.matutils import argsort
  from gensim.models.coherencemodel import CoherenceModel, BOOLEAN_DOCUMENT_BASED
  from gensim.models.ldamodel import LdaModel
  from gensim.test.utils import get_tmpfile, common_texts, common_dictionary, common_corpus
label_desc: Use image node_id 7 for calling the TestCoherenceModel obj's underlying member method code with example usage: obj.testUMassLdaModel() without return types