SummarizerMixin#

class langchain.memory.summary.SummarizerMixin[source]#

Bases: BaseModel

Deprecated since version 0.2.12: Refer here for how to incorporate summaries of conversation history: https://langchain-ai.github.io/langgraph/how-tos/memory/add-summary-conversation-history/

Mixin for summarizer.

Create a new model by parsing and validating input data from keyword arguments.

Raises ValidationError if the input data cannot be parsed to form a valid model.

param prompt: BasePromptTemplate = PromptTemplate(input_variables=['new_lines', 'summary'], template='Progressively summarize the lines of conversation provided, adding onto the previous summary returning a new summary.\n\nEXAMPLE\nCurrent summary:\nThe human asks what the AI thinks of artificial intelligence. The AI thinks artificial intelligence is a force for good.\n\nNew lines of conversation:\nHuman: Why do you think artificial intelligence is a force for good?\nAI: Because artificial intelligence will help humans reach their full potential.\n\nNew summary:\nThe human asks what the AI thinks of artificial intelligence. The AI thinks artificial intelligence is a force for good because it will help humans reach their full potential.\nEND OF EXAMPLE\n\nCurrent summary:\n{summary}\n\nNew lines of conversation:\n{new_lines}\n\nNew summary:')#

param summary_message_cls: Type[BaseMessage] = <class 'langchain_core.messages.system.SystemMessage'>#

async apredict_new_summary(messages: List[BaseMessage], existing_summary: str) → str[source]#

Parameters:

Return type:

str

predict_new_summary(messages: List[BaseMessage], existing_summary: str) → str[source]#

Parameters:

Return type:

str