Source code for langchain.agents.output_parsers.xml

from typing import Union

from langchain_core.agents import AgentAction, AgentFinish

from langchain.agents import AgentOutputParser

[docs]class XMLAgentOutputParser(AgentOutputParser): """Parses tool invocations and final answers in XML 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. ``` <tool>search</tool> <tool_input>what is 2 + 2</tool_input> ``` 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. ``` <final_answer>Foo</final_answer> ``` """
[docs] def parse(self, text: str) -> Union[AgentAction, AgentFinish]: if "</tool>" in text: tool, tool_input = text.split("</tool>") _tool = tool.split("<tool>")[1] _tool_input = tool_input.split("<tool_input>")[1] if "</tool_input>" in _tool_input: _tool_input = _tool_input.split("</tool_input>")[0] return AgentAction(tool=_tool, tool_input=_tool_input, log=text) elif "<final_answer>" in text: _, answer = text.split("<final_answer>") if "</final_answer>" in answer: answer = answer.split("</final_answer>")[0] return AgentFinish(return_values={"output": answer}, log=text) else: raise ValueError
[docs] def get_format_instructions(self) -> str: raise NotImplementedError
@property def _type(self) -> str: return "xml-agent"