code: def index_file_path(prefix_path):
      return prefix_path + ".idx"
  
imports: import os
  import shutil
  import struct
  from functools import lru_cache
  from itertools import accumulate
  import numpy
  import torch
label_desc: Use image node_id 10 for calling a global function with example usage: index_file_path(prefix_path) and returns: unknown