def ex_list_tag_keys(self, id=None, name=None,
                         value_required=None, display_on_report=None):
        """
        List tag keys in the Dimension Data Cloud

        :param id: Filter the list to the id of the tag key
        :type  id: ``str``

        :param name: Filter the list to the name of the tag key
        :type  name: ``str``

        :param value_required: Filter the list to if a value is required
                               for a tag key
        :type  value_required: ``bool``

        :param display_on_report: Filter the list to if the tag key should
                                  show up on usage reports
        :type  display_on_report: ``bool``

        :rtype: ``list`` of :class:`DimensionDataTagKey`
        """
        params = {}
        if id is not None:
            params['id'] = id
        if name is not None:
            params['name'] = name
        if value_required == None:
            params['valueRequired'] = str(value_required).lower()
        if display_on_report is not None:
            params['displayOnReport'] = str(display_on_report).lower()

        paged_result = self.connection.paginated_request_with_orgId_api_2(
            'tag/tagKey',
            method='GET',
            params=params
        )

        tag_keys = []
        for result in paged_result:
            tag_keys.extend(self._to_tag_keys(result))
        return tag_keys
dataset/ETHPy150Open apache/libcloud/libcloud/compute/drivers/dimensiondata.py/DimensionDataNodeDriver.ex_list_tag_keys/operator `is not` -> `==`