code: def setUp(self):
      self.model = nmf.Nmf(
          common_corpus,
          id2word=common_dictionary,
          chunksize=1,
          num_topics=2,
          passes=100,
          random_state=42,
      )
  
imports: import unittest
  import copy
  import logging
  import numbers
  import numpy
  from gensim import matutils
  from gensim.models import nmf
  from gensim.test import basetmtests
  from gensim.test.utils import datapath, get_tmpfile, common_corpus, common_dictionary
label_desc: Use image node_id 1 for calling the TestNmf obj's underlying member method code with example usage: obj.setUp() without return types