code: def test_factory_Flat(self):
      index = faiss.index_binary_factory(16, "BFlat")
      assert index.code_size == 2
  
file_path: faiss/tests/test_binary_factory.py
imports: from __future__ import absolute_import, division, print_function
  import unittest
  import faiss
label_desc: Use image node_id 2 for calling the TestBinaryFactory obj's underlying member method code with example usage: obj.test_factory_Flat() without return types