mirror of
https://github.com/Mintplex-Labs/langchain-python.git
synced 2026-08-27 01:15:22 -04:00
Harrison Chase
27 lines
978 B
Python
27 lines
978 B
Python
import re
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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.conversational.prompt import FORMAT_INSTRUCTIONS
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from langchain.schema import AgentAction, AgentFinish, OutputParserException
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class ConvoOutputParser(AgentOutputParser):
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ai_prefix: str = "AI"
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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 f"{self.ai_prefix}:" in text:
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return AgentFinish(
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{"output": text.split(f"{self.ai_prefix}:")[-1].strip()}, text
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)
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regex = r"Action: (.*?)[\n]*Action Input: (.*)"
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match = re.search(regex, text)
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if not match:
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raise OutputParserException(f"Could not parse LLM output: `{text}`")
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action = match.group(1)
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action_input = match.group(2)
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return AgentAction(action.strip(), action_input.strip(" ").strip('"'), text)
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