output_parsers

Parses tool invocations and final answers in JSON format.

Expects output to be in one of two formats.

If the output signals that an action should be taken, should be in the below format. This will result in an AgentAction being returned.

{"action": "search", "action_input": "2+2"}

If the output signals that a final answer should be given, should be in the below format. This will result in an AgentFinish being returned.

{"action": "Final Answer", "action_input": "4"}

Parses a message into agent action/finish.

Is meant to be used with OpenAI models, as it relies on the specific function_call parameter from OpenAI to convey what tools to use.

If a function_call parameter is passed, then that is used to get the tool and tool input.

If one is not passed, then the AIMessage is assumed to be the final output.

Parses ReAct-style LLM calls that have a single tool input in json format.

Expects output to be in one of two formats.

If the output signals that an action should be taken, should be in the below format. This will result in an AgentAction being returned.

Thought: agent thought here
Action:

{ "action": "search", "action_input": "what is the temperature in SF" }

If the output signals that a final answer should be given, should be in the below format. This will result in an AgentFinish being returned.

Thought: agent thought here
Final Answer: The temperature is 100 degrees

Parses ReAct-style LLM calls that have a single tool input.

Expects output to be in one of two formats.

If the output signals that an action should be taken, should be in the below format. This will result in an AgentAction being returned.

Thought: agent thought here
Action: search
Action Input: what is the temperature in SF?

If the output signals that a final answer should be given, should be in the below format. This will result in an AgentFinish being returned.

Thought: agent thought here
Final Answer: The temperature is 100 degrees

Parses self-ask style LLM calls.

Expects output to be in one of two formats.

If the output signals that an action should be taken, should be in the below format. This will result in an AgentAction being returned.

Thoughts go here...
Follow up: what is the temperature in SF?

If the output signals that a final answer should be given, should be in the below format. This will result in an AgentFinish being returned.

Thoughts go here...
So the final answer is: The temperature is 100 degrees

Parses a message into agent actions/finish.

If a tool_calls parameter is passed, then that is used to get the tool names and tool inputs.

If one is not passed, then the AIMessage is assumed to be the final output.

Parses tool invocations and final answers from XML-formatted agent output.

This parser extracts structured information from XML tags to determine whether an agent should perform a tool action or provide a final answer. It includes built-in escaping support to safely handle tool names and inputs containing XML special characters.