code: def get_route53_records(self):
          ''' Get and store the map of resource records to domain names that
          point to them. '''
  
          r53_conn = route53.Route53Connection()
          all_zones = r53_conn.get_zones()
  
          route53_zones = [ zone for zone in all_zones if zone.name[:-1]
                            not in self.route53_excluded_zones ]
  
          self.route53_records = {}
  
          for zone in route53_zones:
              rrsets = r53_conn.get_all_rrsets(zone.id)
  
              for record_set in rrsets:
                  record_name = record_set.name
  
                  if record_name.endswith('.'):
                      record_name = record_name[:-1]
  
                  for resource in record_set.resource_records:
                      self.route53_records.setdefault(resource, set())
                      self.route53_records[resource].add(record_namef get_route53_records(self):
          ''' Get and store the map of resource records to domain names that
          point to them. '''
  
          r53_conn = route53.Route53Connection()
          all_zones = r53_conn.get_zones()
  
          route53_zones = [ zone for zone in all_zones if zone.name[:-1]
                            not in self.route53_excluded_zones ]
  
          self.route53_records = {}
  
          for zone in route53_zones:
              rrsets = r53_conn.get_all_rrsets(zone.id)
  
              for record_set in rrsets:
                  record_name = record_set.name
  
                  if record_name.endswith('.'):
                      record_name = record_name[:-1]
  
                  for resource in record_set.resource_records:
                      self.route53_records.setdefault(resource, set())
                      self.route53_records[resource].add(record_name)
docs: Get and store the map of resource records to domain names that
          point to them.