code: def test_nprobe(self):
      index = faiss.index_factory(32, "IVF32,Flat")
      ps = faiss.ParameterSpace()
      ps.set_index_parameter(index, "nprobe", 5)
      self.assertEqual(index.nprobe, 5)
  
file_path: faiss/tests/test_autotune.py
imports: import unittest
  import faiss
label_desc: Use image node_id 1 for calling the TestParameterSpace obj's underlying member method code with example usage: obj.test_nprobe() without return types