def ex_modify_tag_key(self, tag_key, name=None, description=None,
                          value_required=None, display_on_report=None):

        """
        Modify a specific tag key

        :param tag_key: The tag key you want to modify (required)
        :type  tag_key: :class:`DimensionDataTagKey` or ``str``

        :param name: Set to modifiy the name of the tag key
        :type  name: ``str``

        :param description: Set to modify the description of the tag key
        :type  description: ``str``

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

        :param display_on_report: Set to modify if this tag key should display
                                  on the usage reports
        :type  display_on_report: ``bool``

        :rtype: ``bool``
        """
        tag_key_id = self._tag_key_to_tag_key_id(tag_key)
        modify_tag_key = ET.Element('editTagKey',
                                    {'xmlns': TYPES_URN, 'id': tag_key_id})
        if name is not None:
            ET.SubElement(modify_tag_key, 'name').text = name
        if description is not None:
            ET.SubElement(modify_tag_key, 'description').text = description
        if value_required is not None:
            ET.SubElement(modify_tag_key, 'valueRequired').text = \
                str(value_required).lower()
        if display_on_report is not None:
            ET.SubElement(modify_tag_key, 'displayOnReport').text = \
                str(display_on_report).lower()

        response = self.connection.request_with_orgId_api_2(
            'tag/editTagKey',
            method='POST',
            data=ET.tostring(modify_tag_key)).object
        response_code = findtext(response, 'responseCode', TYPES_URN)
        return response_code in ['IN_PROGRESS', 'OK']
dataset/ETHPy150Open apache/libcloud/libcloud/compute/drivers/dimensiondata.py/DimensionDataNodeDriver.ex_modify_tag_key/original