code: def get_all_zones(self, zones=None, filters=None):
          
          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')
docs: 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