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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 _FormatDateTime(self, event):
 """Formats the date and time in ISO 8601 format. Args: event (EventObject):
 event. Returns: str: date and time field. """

    try:
      return timelib.Timestamp.CopyToIsoFormat(
          event.timestamp, timezone=self._output_mediator.timezone,
          raise_error=True)

    except (OverflowError, ValueError) as exception:
      self._ReportEventError(event, (
          'unable to copy timestamp: {0!s} to a human readable date and time '
          'with error: {1!s}. Defaulting to: "0000-00-00T00:00:00"').format(
              event.timestamp, exception))

      return '0000-00-00T00:00:00'