code: def human_readable_time(s):
      h, s = divmod(s, 3600)
      m, s = divmod(s, 60)
      return "{:>02.0f}:{:02.0f}:{:>07.4f}".format(h, m, s)
  
imports: import time
label_desc: Use image node_id 1 for calling a global function with example usage: human_readable_time(s) and returns: str