code: def regions():
      
      return [SDBRegionInfo(name='us-east-1',
                            endpoint='sdb.amazonaws.com'),
              SDBRegionInfo(name='eu-west-1',
                            endpoint='sdb.eu-west-1.amazonaws.com'),
              SDBRegionInfo(name='us-west-1',
                            endpoint='sdb.us-west-1.amazonaws.com'),
              SDBRegionInfo(name='sa-east-1',
                            endpoint='sdb.sa-east-1.amazonaws.com'),
              SDBRegionInfo(name='us-west-2',
                            endpoint='sdb.us-west-2.amazonaws.com'),
              SDBRegionInfo(name='ap-northeast-1',
                            endpoint='sdb.ap-northeast-1.amazonaws.com'),
              SDBRegionInfo(name='ap-southeast-1',
                            endpoint='sdb.ap-southeast-1.amazonaws.com')
              ]
docs: Get all available regions for the SDB service.
  
      :rtype: list
      :return: A list of :class:`boto.sdb.regioninfo.RegionInfo` instances