nicolargo / glances

        See get_raw_history for a full description"""

        return self.get_raw_history(item=item)

    def get_stats_history(self, item=None, nb=0):

        """Return the stats history as a JSON object (dict or None).

        Limit to lasts nb items (all if nb=0)"""

        s = self.get_json_history(nb=nb)

        if item is None:

            return self._json_dumps(s)

        if isinstance(s, dict):

            try:

                return self._json_dumps({item: s[item]})

            except KeyError as e:

                logger.error("Cannot get item history {} ({})".format(item, e))

                return None

        elif isinstance(s, list):

            try:

                # Source:

                # http://stackoverflow.com/questions/4573875/python-get-index-of-dictionary-item-in-list

                return self._json_dumps({item: map(itemgetter(item), s)})

            except (KeyError, ValueError) as e:

                logger.error("Cannot get item history {} ({})".format(item, e))

                return None

        else:

            return None

    @property

    def input_method(self):

        """Return the stats object in JSON format."""

        return self._json_dumps(self.stats)

    def get_stats_item(self, item):

        """Return the stats object for a specific item in JSON format.

        Stats should be a list of dict (processlist, network...)

        """

        if isinstance(self.stats, dict):

            try:

                return self._json_dumps({item: self.stats[item]})

            except KeyError as e:

                logger.error("Cannot get item {} ({})".format(item, e))

                return None

        elif isinstance(self.stats, list):

            try:

                # Source:

                # http://stackoverflow.com/questions/4573875/python-get-index-of-dictionary-item-in-list

                return self._json_dumps({item: map(itemgetter(item), self.stats)})

            except (KeyError, ValueError) as e:

                logger.error("Cannot get item {} ({})".format(item, e))

                return None

        else:

            return None

    def get_stats_value(self, item, value):

        """Return the stats object for a specific item=value in JSON format.