AstraDBBaseStore#

class langchain_community.storage.astradb.AstraDBBaseStore(*args: Any, **kwargs: Any)[source]#

Base class for the DataStax AstraDB data store.

Methods

__init__(*args,Β **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(*[,Β 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(*[,Β prefix])

Get an iterator over keys that match the given prefix.

Parameters:
  • args (Any)

  • kwargs (Any)

__init__(*args: Any, **kwargs: Any) β†’ None[source]#
Parameters:
  • args (Any)

  • kwargs (Any)

Return type:

None

async amdelete(keys: Sequence[str]) β†’ 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]) β†’ 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]]) β†’ 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) β†’ 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) β†’ V | None[source]#

Decodes value from Astra DB

Parameters:

value (Any)

Return type:

V | None

abstract encode_value(value: V | None) β†’ Any[source]#

Encodes value for Astra DB

Parameters:

value (V | None)

Return type:

Any

mdelete(keys: Sequence[str]) β†’ 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]) β†’ 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]]) β†’ 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) β†’ 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]