code: def get_uttid(wav):
      if "/" in wav:
          return wav.split("/")[-4] + "_" + wav[-21:-4].replace("/", "")
  
imports: import csv
  import os
  import random
  import subprocess
  import sys
label_desc: Use image node_id 1 for calling a global function with example usage: get_uttid(wav) and returns: unknown