LLMSingleActionAgent

class langchain.agents.agent.LLMSingleActionAgent

Bases: BaseSingleActionAgent

Deprecated since version 0.1.0: Use new agent constructor methods like create_react_agent, create_json_agent, create_structured_chat_agent, etc.

Base class for single action agents.

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

Raises [ValidationError][pydantic_core.ValidationError] if the input data cannot be validated to form a valid model.

self is explicitly positional-only to allow self as a field name.

param llm_chain: LLMChain [Required]

LLMChain to use for agent.

param output_parser: AgentOutputParser [Required]

Output parser to use for agent.

param stop: List[str] [Required]

List of strings to stop on.

async aplan(intermediate_steps: List[Tuple[AgentAction, str]], callbacks: list[BaseCallbackHandler] | BaseCallbackManager | None = None, **kwargs: Any) → AgentAction | AgentFinish

Async given input, decided what to do.

Parameters:

• intermediate_steps (List[Tuple[AgentAction, str]]) – Steps the LLM has taken to date, along with observations.

• callbacks (list[BaseCallbackHandler] | BaseCallbackManager | None) – Callbacks to run.

• **kwargs (Any) – User inputs.

Returns:

Action specifying what tool to use.

Return type:

AgentAction | AgentFinish

classmethod from_llm_and_tools(llm: BaseLanguageModel, tools: Sequence[BaseTool], callback_manager: BaseCallbackManager | None = None, **kwargs: Any) → BaseSingleActionAgent

Construct an agent from an LLM and tools.

Parameters:

• llm (BaseLanguageModel) – Language model to use.

• tools (Sequence[BaseTool]) – Tools to use.

• callback_manager (BaseCallbackManager | None) – Callback manager to use.

• kwargs (Any) – Additional arguments.

Returns:

Agent object.

Return type:

BaseSingleActionAgent

get_allowed_tools() → List[str] | None

Return type:

List[str] | None

plan(intermediate_steps: List[Tuple[AgentAction, str]], callbacks: list[BaseCallbackHandler] | BaseCallbackManager | None = None, **kwargs: Any) → AgentAction | AgentFinish

Given input, decided what to do.

Parameters:

• intermediate_steps (List[Tuple[AgentAction, str]]) – Steps the LLM has taken to date, along with the observations.

• callbacks (list[BaseCallbackHandler] | BaseCallbackManager | None) – Callbacks to run.

• **kwargs (Any) – User inputs.

Returns:

Action specifying what tool to use.

Return type:

AgentAction | AgentFinish

return_stopped_response(early_stopping_method: str, intermediate_steps: List[Tuple[AgentAction, str]], **kwargs: Any) → AgentFinish

Return response when agent has been stopped due to max iterations.

Parameters:

• early_stopping_method (str) – Method to use for early stopping.

• intermediate_steps (List[Tuple[AgentAction, str]]) – Steps the LLM has taken to date, along with observations.

• **kwargs (Any) – User inputs.

Returns:

Agent finish object.

Return type:

AgentFinish

Raises:

ValueError – If early_stopping_method is not supported.

save(file_path: Path | str) → None

Save the agent.

Parameters:

file_path (Path | str) – Path to file to save the agent to.

Return type:

None

Example: .. code-block:: python

# If working with agent executor agent.agent.save(file_path=”path/agent.yaml”)

tool_run_logging_kwargs() → Dict

Return logging kwargs for tool run.

Return type:

Dict

property input_keys: List[str]

Return the input keys.

Returns:

List of input keys.

property return_values: List[str]

Return values of the agent.