code: def total_seconds(delta):
      """
      helper function to emulate function total_seconds,
      introduced in python2.7
  
      http://docs.python.org/library/datetime.html\
  #datetime.timedelta.total_seconds
      """
  
      mu_sec = 1e-6  # number of seconds in one microseconds
  
      return delta.seconds + delta.microseconds * mu_sec
  
label_desc: Use image node_id 1 for calling a global function with example usage: total_seconds(delta) and returns: unknown