code: def test_get_topics(self):
      topics = self.model.get_topics()
      vocab_size = len(self.model.id2word)
      for topic in topics:
          self.assertTrue(isinstance(topic, np.ndarray))
          self.assertEqual(topic.dtype, np.float64)
          self.assertEqual(vocab_size, topic.shape[0])
  
imports: import logging
  import unittest
  import numpy
  import scipy.linalg
  from gensim import matutils
  from gensim.corpora.mmcorpus import MmCorpus
  from gensim.models import lsimodel
  from gensim.test import basetmtests
  from gensim.test.utils import datapath, get_tmpfile
label_desc: Use image node_id 11 for calling the TestLsiModel obj's underlying member method code with example usage: obj.test_get_topics() without return types