langchain.memory.chat_message_histories.streamlit.StreamlitChatMessageHistory

class langchain.memory.chat_message_histories.streamlit.StreamlitChatMessageHistory(key: str = 'langchain_messages')

Chat message history that stores messages in Streamlit session state.

Parameters

key – The key to use in Streamlit session state for storing messages.

Attributes

messages

Retrieve the current list of messages

Methods

__init__([key])
add_ai_message(message)	Convenience method for adding an AI message string to the store.
add_message(message)	Add a message to the session memory
add_user_message(message)	Convenience method for adding a human message string to the store.
clear()	Clear session memory

__init__(key: str = 'langchain_messages')

add_ai_message(message: str) → None

Convenience method for adding an AI message string to the store.

Parameters

message – The string contents of an AI message.

add_message(message: BaseMessage) → None

Add a message to the session memory

add_user_message(message: str) → None

Convenience method for adding a human message string to the store.

Parameters

message – The string contents of a human message.

clear() → None

Clear session memory

Examples using StreamlitChatMessageHistory

• Streamlit Chat Message History