langchain_core.stores.BaseStore¶

class langchain_core.stores.BaseStore[source]¶

Abstract interface for a key-value store.

Methods

__init__()

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.

__init__()¶
abstract mdelete(keys: Sequence[K]) None[source]¶

Delete the given keys and their associated values.

Parameters

keys (Sequence[K]) – A sequence of keys to delete.

abstract mget(keys: Sequence[K]) List[Optional[V]][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.

abstract mset(key_value_pairs: Sequence[Tuple[K, V]]) None[source]¶

Set the values for the given keys.

Parameters

key_value_pairs (Sequence[Tuple[K, V]]) – A sequence of key-value pairs.

abstract yield_keys(*, prefix: Optional[str] = None) Union[Iterator[K], Iterator[str]][source]¶

Get an iterator over keys that match the given prefix.

Parameters

prefix (str) – The prefix to match.

Returns

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[K | str]