code: def test_persistence_compressed(self):
      fname = get_tmpfile("gensim_models.tst.gz")
      model = normmodel.NormModel(self.corpus)
      model.save(fname)
      model2 = normmodel.NormModel.load(fname, mmap=None)
      self.assertTrue(model.norms == model2.norms)
      tstvec = []
      # try projecting an empty vector
      self.assertTrue(
          np.allclose(model.normalize(tstvec), model2.normalize(tstvec))
      )
  
imports: import logging
  import unittest
  import numpy
  from scipy.sparse import csr_matrix
  from scipy.sparse import issparse
  from gensim.corpora import mmcorpus
  from gensim.models import normmodel
  from gensim.test.utils import datapath, get_tmpfile
label_desc: Use image node_id 10 for calling the TestNormModel obj's underlying member method code with example usage: obj.test_persistence_compressed() without return types