code: def get_multiple_thread_keygen():
      from rust_paillier.par import keygen, set_num_threads
  
      set_num_threads(NUM_THREADS)
      return keygen
  
imports: import pytest
  import operator
  import os
  import numpy
  import phe
label_desc: Use image node_id 3 for calling a global function with example usage: get_multiple_thread_keygen() and returns: keygen