code: def _par_test(n):
      "Test function to activate Numba parallel config."
      x = 0
      for i in numba.prange(n):
          x += n
  
      return x
  
file_path: lkpy/lenskit/util/debug.py
imports: import sys
  import logging
  from typing import Optional
  from dataclasses import dataclass
  import numba
  import threadpoolctl
  from .parallel import is_worker
label_desc: Use image node_id 1 for calling a global function with example usage: _par_test(n) and returns: x