code: def test_IndexIVFPQ(self):
      ivfpq = faiss.IndexIVFPQ(
          faiss.IndexFlatL2(d), d, ncentroids, M, 8
      )
      ivfpq.nprobe = kprobe
      res = ev.launch("IVF PQ", ivfpq)
      e = ev.evalres(res)
      # should give 0.070  0.230  0.260
      assert e[10] > 0.2
  
imports: from __future__ import absolute_import, division, print_function
  import unittest
  import faiss
  import numpy
  from common_faiss_tests import Randu10k, get_dataset_2, Randu10kUnbalanced
label_desc: Use image node_id 8 for calling the IndexAccuracy obj's underlying member method code with example usage: obj.test_IndexIVFPQ() without return types