code: def get_wav_filename(spk_id, utt_id):
      return f"{data_dir}/20170001P{spk_id}{utt_id}.wav"
  
imports: import os
  import random
  import sys
  from collections import defaultdict
label_desc: Use image node_id 3 for calling a global function with example usage: get_wav_filename(spk_id, utt_id) and returns: data_dir, str, spk_id, utt_id, str