mirror of
https://github.com/Mintplex-Labs/langchain-python.git
synced 2026-08-27 09:21:30 -04:00
Harrison Chase
27 lines
920 B
Python
27 lines
920 B
Python
import json
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from typing import Union
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from langchain.agents.agent import AgentOutputParser
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from langchain.agents.chat.prompt import FORMAT_INSTRUCTIONS
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from langchain.schema import AgentAction, AgentFinish, OutputParserException
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FINAL_ANSWER_ACTION = "Final Answer:"
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class ChatOutputParser(AgentOutputParser):
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def get_format_instructions(self) -> str:
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return FORMAT_INSTRUCTIONS
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def parse(self, text: str) -> Union[AgentAction, AgentFinish]:
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if FINAL_ANSWER_ACTION in text:
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return AgentFinish(
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{"output": text.split(FINAL_ANSWER_ACTION)[-1].strip()}, text
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)
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try:
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action = text.split("```")[1]
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response = json.loads(action.strip())
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return AgentAction(response["action"], response["action_input"], text)
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except Exception:
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raise OutputParserException(f"Could not parse LLM output: {text}")
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