code: def gen_empty_gpu_metric():
      try:
          output = {}
          output["Timestamp"] = time.asctime(time.localtime())
          output["gpuCount"] = 0
          output["gpuInfos"] = []
      except Exception:
          traceback.print_exc()
          output = {}
      return output
  
imports: import subprocess
  import time
  import traceback
  from xml.dom import minidom
label_desc: Use image node_id 3 for calling a global function with example usage: gen_empty_gpu_metric() and returns: output