Get all Availability Zones associated with the current region.

        :type zones: list
        :param zones: Optional list of zones.  If this list is present,
                      only the Zones associated with these zone names
                      will be returned.

        :type filters: dict
        :param filters: Optional filters that can be used to limit
                        the results returned.  Filters are provided
                        in the form of a dictionary consisting of
                        filter names as the key and filter values
                        as the value.  The set of allowable filter
                        names/values is dependent on the request
                        being performed.  Check the EC2 API guide
                        for details.

        :rtype: list of :class:`boto.ec2.zone.Zone`
        :return: The requested Zone objects

def get_all_zones(self, zones=None, filters=None):
        """
        Get all Availability Zones associated with the current region.

        :type zones: list
        :param zones: Optional list of zones.  If this list is present,
                      only the Zones associated with these zone names
                      will be returned.

        :type filters: dict
        :param filters: Optional filters that can be used to limit
                        the results returned.  Filters are provided
                        in the form of a dictionary consisting of
                        filter names as the key and filter values
                        as the value.  The set of allowable filter
                        names/values is dependent on the request
                        being performed.  Check the EC2 API guide
                        for details.

        :rtype: list of :class:`boto.ec2.zone.Zone`
        :return: The requested Zone objects
        """
        params = {}
        if zones:
            self.build_list_params(params, zones, 'ZoneName')
        if filters:
            self.build_filter_params(params, filters)
        return self.get_list('DescribeAvailabilityZones', params,
                             [('item', Zone)], verb='POST')