sample.py

    @classmethod
    def instances(
            cls,
            riak_client=None,
            component_name='',
            revers_index_name='keys',
            debug=False
    ):

        ping_result = riak_client.ping()

        if debug:
            pprint("Riak connectivity")
            pprint("-----------------")
            pprint("Can connect to ring : {r}".format(r=ping_result))

        bucket_name = cls.component_bucket_name(component_name)

        if debug:
            pprint("Bucket to read")
            pprint("--------------")
            pprint(bucket_name)

        bucket = riak_client.bucket(bucket_name)
        sets_buckets = riak_client.bucket_type("sets")
        identifier_set = sets_buckets.bucket(bucket_name).get(revers_index_name)

        data = [
            bucket.get(element).data for element in identifier_set
        ]

        if debug:
            pprint("Data")
            pprint("----")
            print(
                json.dumps(
                    data,
                    sort_keys=True,
                    indent=4,
                    separators=(',', ': ')
                )
            )
        return data