code: def set_num_threads(self, num_threads):
      self.index.set_num_threads(num_threads)
  
file_path: hnswlib/examples/python/pyw_hnswlib.py
imports: import hnswlib
  import numpy
  import threading
  import pickle
label_desc: Use image node_id 7 for calling the Index obj's underlying member method code with example usage: obj.set_num_threads(num_threads) without return types