AstraDBBaseStore#
- class langchain_community.storage.astradb.AstraDBBaseStore(*args: Any, **kwargs: Any)[source]#
Base class for the DataStax AstraDB data store.
Methods
__init__(*args, **kwargs)amdelete(keys)Async delete the given keys and their associated values.
amget(keys)Async get the values associated with the given keys.
amset(key_value_pairs)Async set the values for the given keys.
ayield_keys(*[, prefix])Async get an iterator over keys that match the given prefix.
decode_value(value)Decodes value from Astra DB
encode_value(value)Encodes value for Astra DB
mdelete(keys)Delete the given keys and their associated values.
mget(keys)Get the values associated with the given keys.
mset(key_value_pairs)Set the values for the given keys.
yield_keys(*[, prefix])Get an iterator over keys that match the given prefix.
- Parameters:
args (Any) –
kwargs (Any) –
- __init__(*args: Any, **kwargs: Any) None[source]#
- Parameters:
args (Any) –
kwargs (Any) –
- Return type:
None
- async amdelete(keys: Sequence[str]) None[source]#
Async delete the given keys and their associated values.
- Parameters:
keys (Sequence[K]) – A sequence of keys to delete.
- Return type:
None
- async amget(keys: Sequence[str]) List[V | None][source]#
Async get the values associated with the given keys.
- Parameters:
keys (Sequence[K]) – A sequence of keys.
- Returns:
A sequence of optional values associated with the keys. If a key is not found, the corresponding value will be None.
- Return type:
List[V | None]
- async amset(key_value_pairs: Sequence[Tuple[str, V]]) None[source]#
Async set the values for the given keys.
- Parameters:
key_value_pairs (Sequence[Tuple[K, V]]) – A sequence of key-value pairs.
- Return type:
None
- async ayield_keys(*, prefix: str | None = None) AsyncIterator[str][source]#
Async get an iterator over keys that match the given prefix.
- Parameters:
prefix (str) – The prefix to match.
- Yields:
Iterator[K | str] – An iterator over keys that match the given prefix. This method is allowed to return an iterator over either K or str depending on what makes more sense for the given store.
- Return type:
AsyncIterator[str]
- abstract decode_value(value: Any) V | None[source]#
Decodes value from Astra DB
- Parameters:
value (Any) –
- Return type:
V | None
- abstract encode_value(value: V | None) Any[source]#
Encodes value for Astra DB
- Parameters:
value (V | None) –
- Return type:
Any
- mdelete(keys: Sequence[str]) None[source]#
Delete the given keys and their associated values.
- Parameters:
keys (Sequence[K]) – A sequence of keys to delete.
- Return type:
None
- mget(keys: Sequence[str]) List[V | None][source]#
Get the values associated with the given keys.
- Parameters:
keys (Sequence[K]) – A sequence of keys.
- Returns:
A sequence of optional values associated with the keys. If a key is not found, the corresponding value will be None.
- Return type:
List[V | None]
- mset(key_value_pairs: Sequence[Tuple[str, V]]) None[source]#
Set the values for the given keys.
- Parameters:
key_value_pairs (Sequence[Tuple[K, V]]) – A sequence of key-value pairs.
- Return type:
None
- yield_keys(*, prefix: str | None = None) Iterator[str][source]#
Get an iterator over keys that match the given prefix.
- Parameters:
prefix (str) – The prefix to match.
- Yields:
Iterator[K | str] – An iterator over keys that match the given prefix. This method is allowed to return an iterator over either K or str depending on what makes more sense for the given store.
- Return type:
Iterator[str]