code: def gen_datestr():
      """
      Returns a string with the yy/mm/dd and  hh/mm/ss
      """
      from datetime import datetime
  
      dt = datetime.now()
      return (
          str(dt.year)
          + "."
          + str(dt.month)
          + "."
          + str(dt.day)
          + "_"
          + str(dt.hour)
          + "."
          + str(dt.minute)
          + "."
          + str(dt.second)
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: gen_datestr() and returns: unknown