code: def __init__(self, *args, **kwargs):
      unittest.TestCase.__init__(self, *args, **kwargs)
      d = 32
      nt = 0
      nb = 1500
      nq = 500
      self.GK = 32
  
      _, self.xb, self.xq = get_dataset_2(d, nt, nb, nq)
  
imports: import numpy
  import unittest
  import faiss
  import tempfile
  import os
  from common_faiss_tests import get_dataset_2
label_desc: Use image node_id 1 to create a new TestNSG object from inherited base classes: unittest with example: obj = TestNSG()