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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _ParseNoHeaderSingleLine(self, parser_mediator, structure):
 """Parse an isolated header line and store appropriate attributes. Args: parser_mediator (ParserMediator):
 mediates interactions between parsers and other components, such as storage and dfvfs. structure (pyparsing.ParseResults):
 structure of tokens derived from a line of a text file. """

    if not self._last_event_data:
      logger.debug('SkyDrive, found isolated line with no previous events')
      return

    event_data = SkyDriveOldLogEventData()
    event_data.offset = self._last_event_data.offset
    event_data.text = structure.text

    event = time_events.DateTimeValuesEvent(
        self._last_date_time, definitions.TIME_DESCRIPTION_ADDED)
    parser_mediator.ProduceEventWithEventData(event, event_data)

    # TODO think to a possible refactoring for the non-header lines.
    self._last_date_time = None
    self._last_event_data = None