Types

All types are importable from aerospike_py or aerospike_py.types.

from aerospike_py import Record, ExistsResult, ReadPolicy, WritePolicy, WriteMeta

Return Types (NamedTuple)

All return types support both attribute access and tuple unpacking.

Record

Returned by: get(), select(), operate(), Query.results()

Field	Type	Description
key	AerospikeKey | None	Record key
meta	RecordMetadata | None	Generation and TTL
bins	dict[str, Any] | None	Bin values

record: Record = client.get(key)
print(record.bins)         # attribute access
_, meta, bins = record     # tuple unpacking

RecordMetadata

Field	Type	Description
gen	int	Generation (optimistic lock version)
ttl	int	Time-to-live in seconds

AerospikeKey

Field	Type	Description
namespace	str	Namespace
set_name	str	Set name
user_key	str | int | bytes | None	Primary key (None if POLICY_KEY_DIGEST)
digest	bytes	20-byte RIPEMD-160 digest

BatchRecord

Returned by: batch operations (inside BatchRecords.batch_records)

Field	Type	Description
key	AerospikeKey | None	Record key
result	int	Per-record result code (0 = success)
record	Record | None	Record data (None if operation failed)
in_doubt	bool	Whether the write may have completed despite a transient error (default False)

results = client.batch_operate(keys, ops)
for br in results.batch_records:
    if br.result == 0 and br.record is not None:
        print(br.record.bins)

BatchRecords

Returned by: sync batch_read(), batch_write(), batch_operate(), batch_remove(), batch_write_numpy()

Field	Type	Description
batch_records	list[BatchRecord]	Per-record results

BatchReadHandle

Returned by: async batch_read() (zero-conversion handle wrapping raw Rust results)

Method / Property	Type	Description
as_dict()	dict[str | int, dict[str, Any]]	Fastest path: returns dict[key, bins_dict] directly. Excludes digest-only and failed records.
batch_records	list[BatchRecord]	Compat path: lazy NamedTuple conversion, cached after first access.
found_count()	int	Count of successful records (no conversion needed).
keys()	list[str | int]	Extract user keys without converting record data.
len(handle)	int	Total number of records (including failures).
handle[i]	BatchRecord	Index access with negative index support.
for br in handle	BatchRecord	Iteration (via batch_records).

ExistsResult

Returned by: exists()

Field	Type	Description
key	AerospikeKey | None	Record key
meta	RecordMetadata | None	None if record does not exist

result: ExistsResult = client.exists(key)
if result.meta is not None:
    print(f"gen={result.meta.gen}")

InfoNodeResult

Returned by: info_all()

Field	Type	Description
node_name	str	Cluster node name
error_code	int	0 on success
response	str	Info response string

OperateOrderedResult

Returned by: operate_ordered()

Field	Type	Description
key	AerospikeKey | None	Record key
meta	RecordMetadata | None	Record metadata
ordered_bins	list[BinTuple]	Ordered operation results

BinTuple

Field	Type	Description
name	str	Bin name
value	Any	Bin value

Return Type Quick Reference

Method	Return Type
get(), select()	Record
exists()	ExistsResult
operate()	Record
operate_ordered()	OperateOrderedResult
info_all()	list[InfoNodeResult]
batch_read() (sync)	BatchRecords | NumpyBatchRecords
batch_read() (async)	BatchReadHandle | NumpyBatchRecords
batch_write(), batch_operate(), batch_remove()	BatchRecords
batch_write_numpy()	BatchRecords
Query.results()	list[Record]

---

Input Types (TypedDict)

All fields are optional (total=False).

ClientConfig

Used by: aerospike_py.client(config), AsyncClient(config)

Field	Type	Default	Description
hosts	list[tuple[str, int]]	required	Seed nodes
cluster_name	str		Expected cluster name
auth_mode	int	AUTH_INTERNAL	AUTH_INTERNAL, AUTH_EXTERNAL, AUTH_PKI
user	str		Authentication username
password	str		Authentication password
timeout	int	1000	Connection timeout (ms)
idle_timeout	int		Connection idle timeout (ms)
max_conns_per_node	int	100	Max connections per node
min_conns_per_node	int	0	Pre-warm connections
tend_interval	int	1000	Cluster tend interval (ms)
use_services_alternate	bool	false	Use alternate service addresses

ReadPolicy

Used by: get(), select(), exists()

Field	Type	Default	Description
socket_timeout	int	30000	Socket timeout (ms)
total_timeout	int	1000	Total transaction timeout (ms)
max_retries	int	2	Max retries
sleep_between_retries	int	0	Sleep between retries (ms)
timeout_delay	int	0	Delay (ms) before timing out a request after the deadline. Drains the socket so reused connections do not see stale responses.
filter_expression	Any		Expression filter built via aerospike_py.exp.
replica	int	POLICY_REPLICA_SEQUENCE	Replica selection algorithm.
read_mode_ap	int	POLICY_READ_MODE_AP_ONE	AP namespace read consistency. Maps to aerospike-core ConsistencyLevel.
read_touch_ttl_percent	int	0	Reset TTL on read when within N% of original write TTL (server v8+). 0 = server default, -1 = never reset, 1..=100 = percent.

WritePolicy

Used by: put(), remove(), touch(), append(), prepend(), increment(), remove_bin(), operate(), operate_ordered()

Field	Type	Default	Description
socket_timeout	int	30000	Socket timeout (ms)
total_timeout	int	1000	Total transaction timeout (ms)
max_retries	int	0	Max retries
timeout_delay	int	0	Delay (ms) before timing out a request after the deadline.
durable_delete	bool	false	Durable delete (Enterprise)
key	int	POLICY_KEY_DIGEST	Key send policy
exists	int	POLICY_EXISTS_IGNORE	Existence policy
gen	int	POLICY_GEN_IGNORE	Generation policy
commit_level	int	POLICY_COMMIT_LEVEL_ALL	Commit level
ttl	int	0	Record TTL (seconds)
filter_expression	Any		Expression filter (aerospike_py.exp).
read_mode_ap	int	POLICY_READ_MODE_AP_ONE	AP read consistency for read-after-write operate() ops.
read_touch_ttl_percent	int	0	Reset TTL on read within N% of write TTL (server v8+).

BatchPolicy

Used by: batch_read(), batch_operate(), batch_write(), batch_remove()

Transport / batch-level fields

Field	Type	Default	Description
socket_timeout	int	30000	Socket timeout (ms)
total_timeout	int	1000	Total transaction timeout (ms)
max_retries	int	2	Max retries
timeout_delay	int	0	Delay (ms) before timing out a request after the deadline.
concurrency	int	BATCH_CONCURRENCY_PARALLEL	Per-node dispatch mode: BATCH_CONCURRENCY_SEQUENTIAL (one node at a time) or BATCH_CONCURRENCY_PARALLEL (all nodes in parallel — default). See Batch Concurrency constants. Other values raise ValueError.
filter_expression	Any		Expression filter
allow_inline	bool	true	Allow server inline processing in receiving thread
allow_inline_ssd	bool	false	Allow inline processing for SSD namespaces
respond_all_keys	bool	true	Attempt all keys regardless of per-record errors
replica	int	POLICY_REPLICA_SEQUENCE	Replica selection.
read_mode_ap	int	POLICY_READ_MODE_AP_ONE	AP read consistency for batch_read.
read_touch_ttl_percent	int	0	Reset TTL on read within N% of write TTL (server v8+).

Write defaults (used by batch_write)

These fields apply to every record in a batch_write() call. Per-record WriteMeta overrides them — see the precedence rule.

Field	Type	Default	Description
key	int	POLICY_KEY_DIGEST	Key send policy. Set POLICY_KEY_SEND to persist user keys server-side.
exists	int	POLICY_EXISTS_UPDATE	Existence policy (UPDATE, CREATE_ONLY, REPLACE, etc.).
gen	int	POLICY_GEN_IGNORE	Generation policy. Note: at batch-level, this is the POLICY_GEN_* enum index. Per-record WriteMeta["gen"] is the expected generation value.
commit_level	int	POLICY_COMMIT_LEVEL_ALL	Commit level (ALL or MASTER).
durable_delete	bool	false	Durable delete (Enterprise 3.10+).
ttl	int	0	Record TTL in seconds (0 = namespace default, -1 = never expire, -2 = don't update).

QueryPolicy

Used by: Query.results(), Query.foreach()

Field	Type	Default	Description
socket_timeout	int	30000	Socket timeout (ms)
total_timeout	int	0	Total timeout (0 = no limit)
max_retries	int	2	Max retries
timeout_delay	int	0	Delay (ms) before timing out a request after the deadline.
max_records	int	0	Max records (0 = all)
records_per_second	int	0	Rate limit per node (0 = unlimited).
max_concurrent_nodes	int	0	Limit parallel node queries (0 = unlimited).
record_queue_size	int	1024	Buffer capacity for record results.
filter_expression	Any		Expression filter.
replica	int	POLICY_REPLICA_SEQUENCE	Replica selection.
read_mode_ap	int	POLICY_READ_MODE_AP_ONE	AP read consistency.
read_touch_ttl_percent	int	0	Reset TTL on read within N% of write TTL (server v8+).
expected_duration	int	QUERY_DURATION_LONG	Server hint about query duration (QUERY_DURATION_LONG / _SHORT / _LONG_RELAX_AP).
include_bin_data	bool	true	Include bin payload in results. Set False to fetch keys/metadata only.
partition_filter	PartitionFilter	(all 4096)	Restrict the query/scan to a partition subset. Use aerospike_py.partition_filter_*() helpers.

ScanPolicy

Used by: client.scan() and client.query() invocations without a where() predicate. Mirrors the official Python C client's ScanPolicy. Currently the Rust layer routes scan calls through the QueryPolicy parser — when aerospike-core exposes a separate ScanPolicy struct, scan paths will switch to a dedicated parser without changing this user-facing type. See issue #316.

Field	Type	Default	Description
socket_timeout	int	30000	Socket timeout (ms).
total_timeout	int	0	Total timeout (0 = no limit).
max_retries	int	2	Max retries.
timeout_delay	int	0	Delay (ms) before timing out a request after the deadline.
filter_expression	Any		Expression filter.
replica	int	POLICY_REPLICA_SEQUENCE	Replica selection.
read_mode_ap	int	POLICY_READ_MODE_AP_ONE	AP read consistency.
records_per_second	int	0	Rate limit per node (0 = unlimited; server 4.7+).
max_records	int	0	Approx max records returned (0 = all; server 6.0+).
durable_delete	bool	false	Background scan-write durable delete (Enterprise 3.10+).
ttl	int	0	Default TTL for background scan-writes.
partition_filter	PartitionFilter	(all 4096)	Restrict the scan to a partition subset.

BatchReadPolicy

Used by: per-record policy in batch_read().

Field	Type	Default	Description
read_touch_ttl_percent	int	0	Reset TTL on read within N% of write TTL (server v8+). 0 = server default, -1 = never reset, 1..=100 = percent.
filter_expression	Any		Expression filter. Records that fail return BatchRecord.result == FILTERED_OUT.

BatchDeletePolicy

Used by: batch-level policy for batch_remove(). Per-record overrides go in BatchDeleteMeta.

Field	Type	Default	Description
gen	int	POLICY_GEN_IGNORE	Generation policy enum (POLICY_GEN_*).
key	int	POLICY_KEY_DIGEST	Send user key with the delete (XDR-friendly).
commit_level	int	POLICY_COMMIT_LEVEL_ALL	Commit level.
durable_delete	bool	false	Leave a tombstone (Enterprise 3.10+).
filter_expression	Any		Expression filter.

BatchDeleteMeta

Per-record meta for batch_remove(). Pass as the second element of a (key, meta) tuple in the keys argument. Setting gen enables CAS-style "delete only if generation matches" semantics — server returns per-record GENERATION_ERROR if generation has advanced.

Field	Type	Description
gen	int	Expected generation. Setting this implies POLICY_GEN_EQ.
key	int	Key send policy (POLICY_KEY_DIGEST / POLICY_KEY_SEND).
commit_level	int	Commit level (POLICY_COMMIT_LEVEL_ALL / _MASTER).
durable_delete	bool	Durable delete (Enterprise 3.10+).

# CAS delete: only delete user_1 if generation is still 3.
client.batch_remove([
    (("test", "demo", "user_1"), {"gen": 3}),
    ("test", "demo", "user_2"),  # bare key, no CAS
])

BatchUDFPolicy

Used by: batch-level UDF policy for batch_apply(). Per-record overrides go in BatchUDFMeta. Transport-level options (timeouts, retries, concurrency, etc.) live on BatchPolicy and are merged into the same policy dict you pass to batch_apply().

Field	Type	Default	Description
commit_level	int	POLICY_COMMIT_LEVEL_ALL	Commit level (POLICY_COMMIT_LEVEL_ALL / _MASTER).
ttl	int	0	Record TTL in seconds (0 = namespace default, -1 = never expire, -2 = don't update).
key	int	POLICY_KEY_DIGEST	Key send policy (POLICY_KEY_DIGEST / POLICY_KEY_SEND).
durable_delete	bool	false	Durable delete for UDFs that delete records (Enterprise 3.10+).
filter_expression	Any		Expression filter applied to each record. Records that fail the filter return BatchRecord.result == FILTERED_OUT.

BatchUDFMeta

Per-record meta for batch_apply(). Pass as the second element of a (key, meta) tuple in the keys argument. Single flat dict (matching BatchDeleteMeta) that may both override the UDF call shape and the policy fields for a specific record.

Field	Type	Description
module	str	Override the UDF module name for this record. Falls back to the module argument of batch_apply().
function	str	Override the UDF function name for this record.
args	list[Any]	Override the argument list. Passing [] explicitly clears the default args.
ttl	int	Override TTL in seconds for this record (same semantics as WriteMeta.ttl).
commit_level	int	Override commit level.
key	int	Override key send policy (POLICY_KEY_DIGEST / POLICY_KEY_SEND).
durable_delete	bool	Override durable_delete.

note

filter_expression is not accepted in BatchUDFMeta — set it on the batch-level BatchUDFPolicy instead. (Per-record filter_expression is unwired in aerospike-core 2.0; matches the BatchDeleteMeta shape.)

# Apply the same UDF to many keys.
keys = [("test", "demo", f"u_{i}") for i in range(10)]
results = client.batch_apply(keys, "my_udf", "increment_counter", [1])

# Per-record overrides: different args / longer TTL on one record.
results = client.batch_apply(
    [
        ("test", "demo", "u_1"),  # uses default args
        (("test", "demo", "u_2"), {"args": [5], "ttl": 3600}),
    ],
    "my_udf", "increment_counter", args=[1],
)

PartitionFilter

Opaque handle scoping a query/scan to a subset of partitions (server 6.0+). Construct via the module-level helpers:

import aerospike_py

pf_all   = aerospike_py.partition_filter_all()
pf_one   = aerospike_py.partition_filter_by_id(42)        # single partition (0..4095)
pf_range = aerospike_py.partition_filter_by_range(0, 1024) # 1/4 of partitions
records = client.query("test", "demo").results(policy={"partition_filter": pf_range})

The handle holds mutable internal state (Arc<Mutex<Vec<PartitionStatus>>>). aerospike-py clones the inner filter at parse time so the user's handle is isolated from in-flight query state mutations. To deliberately resume a scan from where the previous run left off, pass the same handle to multiple results() calls — see issue #318 for v2 cursor semantics.

AdminPolicy

Used by: all admin_* methods, index operations, truncate()

Field	Type	Default	Description
timeout	int	1000	Timeout (ms)

WriteMeta

Used by: put(), remove(), touch(), operate() as the meta parameter, and per-record in batch_write() as the third tuple element (key, bins, meta).

In batch_write(), fields set in per-record WriteMeta override the corresponding batch-level BatchPolicy defaults — see the precedence rule.

Field	Type	Description
gen	int	Expected generation. Setting this implies POLICY_GEN_EQ (CAS-style write).
ttl	int	Record TTL in seconds. Special values: 0 = namespace default, -1 = never expire, -2 = don't update.
key	int	Key send policy (POLICY_KEY_DIGEST / POLICY_KEY_SEND).
exists	int	Existence policy (POLICY_EXISTS_*).
commit_level	int	Commit level (POLICY_COMMIT_LEVEL_ALL / _MASTER).
durable_delete	bool	Durable delete (Enterprise 3.10+).

Write field precedence (batch_write)

For every write field, per-record WriteMeta always wins over batch-level BatchPolicy:

Field	BatchPolicy (batch-level)	WriteMeta (per-record)	Notes
ttl	✅	✅	Same semantics on both sides.
key	✅	✅	Set POLICY_KEY_SEND to persist user keys server-side.
exists	✅	✅	e.g. POLICY_EXISTS_CREATE_ONLY for upsert-fail-on-exists.
gen	✅ (enum index)	✅ (expected value)	Asymmetric: batch-level = POLICY_GEN_* enum index; per-record = numeric generation that forces POLICY_GEN_EQ.
commit_level	✅	✅
durable_delete	✅	✅

Privilege

Used by: admin_create_role(), admin_grant_privileges(), admin_revoke_privileges()

Field	Type	Description
code	int	Privilege code (PRIV_READ, PRIV_WRITE, etc.)
ns	str	Namespace scope (empty = global)
set	str	Set scope (empty = namespace-wide)

UserInfo

Returned by: admin_query_user_info(), admin_query_users_info()

Field	Type	Description
user	str	Username
roles	list[str]	Assigned roles
conns_in_use	int	Active connections

RoleInfo

Returned by: admin_query_role(), admin_query_roles()

Field	Type	Description
name	str	Role name
privileges	list[Privilege]	Assigned privileges
allowlist	list[str]	IP allowlist
read_quota	int	Read quota
write_quota	int	Write quota