Store implements the key-value stores and storage helpers.
Module provides implementations of various key-value stores that conform to a simple key-value interface.
The primary goal of these storages is to support implementation of caching.
General LangChain exception.
Abstract interface for a key-value store.
This is an interface that's meant to abstract away the details of different key-value stores. It provides a simple interface for getting, setting, and deleting key-value pairs.
The basic methods are mget, mset, and mdelete for getting, setting, and
deleting multiple key-value pairs at once. The yield_keys method is used to
iterate over keys that match a given prefix.
The async versions of these methods are also provided, which are meant to be used in
async contexts. The async methods are named with an a prefix, e.g., amget,
amset, amdelete, and ayield_keys.
By default, the amget, amset, amdelete, and ayield_keys methods are
implemented using the synchronous methods. If the store can natively support async
operations, it should override these methods.
By design the methods only accept batches of keys and values, and not single keys or values. This is done to force user code to work with batches which will usually be more efficient by saving on round trips to the store.
In-memory implementation of the BaseStore using a dictionary.
In-memory store for any type of data.
In-memory store for bytes.
Raised when a key is invalid; e.g., uses incorrect characters.
