code: def int2time(t):
      timestamp = datetime.datetime.fromtimestamp(t)
      return timestamp.strftime('"%H:%M"')
  
imports: import os
  import time
  import datetime
  import numpy
  import pandas
  import paddle
  from paddle.io import Dataset
  import pgl
  from pgl.utils.logger import log
label_desc: Use image node_id 3 for calling a global function with example usage: int2time(t) and returns: timestamp