chat_message_histories

Chat message history stores a history of the message interactions in a chat.

Class hierarchy:

BaseChatMessageHistory --> <name>ChatMessageHistory  # Examples: FileChatMessageHistory, PostgresChatMessageHistory

Main helpers:

AIMessage, HumanMessage, BaseMessage

Classes

chat_message_histories.cassandra.CassandraChatMessageHistory(...)	Chat message history that is backed by Cassandra.
chat_message_histories.cosmos_db.CosmosDBChatMessageHistory(...)	Chat message history backed by Azure CosmosDB.
chat_message_histories.dynamodb.DynamoDBChatMessageHistory(...)	Chat message history that stores history in AWS DynamoDB.
chat_message_histories.file.FileChatMessageHistory(...)	Chat message history that stores history in a local file.
chat_message_histories.firestore.FirestoreChatMessageHistory(...)	Chat message history backed by Google Firestore.
chat_message_histories.kafka.ConsumeStartPosition(value)	Consume start position for Kafka consumer to get chat history messages.
chat_message_histories.kafka.KafkaChatMessageHistory(...)	Chat message history stored in Kafka.
chat_message_histories.momento.MomentoChatMessageHistory(...)	Chat message history cache that uses Momento as a backend.
chat_message_histories.neo4j.Neo4jChatMessageHistory(...)	Chat message history stored in a Neo4j database.
chat_message_histories.redis.RedisChatMessageHistory(...)	Chat message history stored in a Redis database.
chat_message_histories.rocksetdb.RocksetChatMessageHistory(...)	Uses Rockset to store chat messages.
chat_message_histories.singlestoredb.SingleStoreDBChatMessageHistory(...)	Chat message history stored in a SingleStoreDB database.
chat_message_histories.sql.BaseMessageConverter()	Convert BaseMessage to the SQLAlchemy model.
chat_message_histories.sql.DefaultMessageConverter(...)	The default message converter for SQLChatMessageHistory.
chat_message_histories.sql.SQLChatMessageHistory(...)	Chat message history stored in an SQL database.
chat_message_histories.streamlit.StreamlitChatMessageHistory([key])	Chat message history that stores messages in Streamlit session state.
chat_message_histories.tidb.TiDBChatMessageHistory(...)	Represents a chat message history stored in a TiDB database.
chat_message_histories.upstash_redis.UpstashRedisChatMessageHistory(...)	Chat message history stored in an Upstash Redis database.
chat_message_histories.xata.XataChatMessageHistory(...)	Chat message history stored in a Xata database.
chat_message_histories.zep.SearchScope(value)	Scope for the document search.
chat_message_histories.zep.SearchType(value)	Enumerator of the types of search to perform.
chat_message_histories.zep.ZepChatMessageHistory(...)	Chat message history that uses Zep as a backend.
chat_message_histories.zep_cloud.ZepCloudChatMessageHistory(...)	Chat message history that uses Zep Cloud as a backend.

Functions

chat_message_histories.kafka.ensure_topic_exists(...)	Create topic if it doesn't exist, and return the number of partitions.
chat_message_histories.sql.create_message_model(...)	Create a message model for a given table name.
chat_message_histories.zep_cloud.condense_zep_memory_into_human_message(...)	Condense Zep memory into a human message.
chat_message_histories.zep_cloud.get_zep_message_role_type(role)	Get the Zep role type from the role string.

Deprecated classes

chat_message_histories.astradb.AstraDBChatMessageHistory(*, ...)
chat_message_histories.elasticsearch.ElasticsearchChatMessageHistory(...)
chat_message_histories.mongodb.MongoDBChatMessageHistory(...)
chat_message_histories.postgres.PostgresChatMessageHistory(...)