code: def test_IP(self):
      self.do_test(faiss.METRIC_INNER_PRODUCT)
  
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 2 for calling the TestRefine obj's underlying member method code with example usage: obj.test_IP() without return types