code: def test_transfer(self):
      ds = SyntheticDataset(32, 2000, 200, 100)
      index = faiss.index_factory(ds.d, "IVF20,SQ8")
      index.train(ds.get_train())
      index.add(ds.get_database())
      Dref, Iref = index.search(ds.get_queries(), 10)
      index.reset()
  
      codes = index.sa_encode(ds.get_database())
      index.add_sa_codes(codes)
  
      Dnew, Inew = index.search(ds.get_queries(), 10)
  
      np.testing.assert_array_equal(Iref, Inew)
      np.testing.assert_array_equal(Dref, Dnew)
  
imports: from __future__ import print_function
  import numpy
  import unittest
  import faiss
  from common_faiss_tests import get_dataset_2
  from faiss.contrib.datasets import SyntheticDataset
  from faiss.contrib.inspect_tools import get_additive_quantizer_codebooks
label_desc: Use image node_id 1 for calling the TestIVFTransfer obj's underlying member method code with example usage: obj.test_transfer() without return types