code: def test_read_index_ownership(self):
      d = self.xq.shape[1] * 8
  
      index = faiss.IndexBinaryFlat(d)
      index.add(self.xb)
  
      fd, tmpnam = tempfile.mkstemp()
      os.close(fd)
      try:
          faiss.write_index_binary(index, tmpnam)
  
          index2 = faiss.read_index_binary(tmpnam)
  
          assert index2.thisown
      finally:
          os.remove(tmpnam)
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import numpy
  import unittest
  import faiss
  import os
  import tempfile
label_desc: Use image node_id 2 for calling the TestObjectOwnership obj's underlying member method code with example usage: obj.test_read_index_ownership() without return types