text: import datetime
  
  
  def julian_to_datetime(input_string: str):
      """
  
      :param: input_string String to be converted
      :rtype: datetime object
      """
      if len(input_string) == 5:
  
          date = datetime.datetime.strptime(input_string, '%y%j')
  
      elif len(input_string) == 7:
  
          date = datetime.datetime.strptime(input_string, '%Y%j')
      else:
          raise UtilityException("Incorrect parameter length passed to "
                                 "julian_to_datetime")
  
      return date
  
  
  class UtilityException(Exception):
      pass
  