forked from Archives/langchain
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
24 lines
889 B
Python
24 lines
889 B
Python
import re
|
|
from typing import Union
|
|
|
|
from langchain.agents.agent import AgentOutputParser
|
|
from langchain.schema import AgentAction, AgentFinish
|
|
|
|
FINAL_ANSWER_ACTION = "Final Answer:"
|
|
|
|
|
|
class MRKLOutputParser(AgentOutputParser):
|
|
def parse(self, text: str) -> Union[AgentAction, AgentFinish]:
|
|
if FINAL_ANSWER_ACTION in text:
|
|
return AgentFinish(
|
|
{"output": text.split(FINAL_ANSWER_ACTION)[-1].strip()}, text
|
|
)
|
|
# \s matches against tab/newline/whitespace
|
|
regex = r"Action\s*\d*\s*:(.*?)\nAction\s*\d*\s*Input\s*\d*\s*:[\s]*(.*)"
|
|
match = re.search(regex, text, re.DOTALL)
|
|
if not match:
|
|
raise ValueError(f"Could not parse LLM output: `{text}`")
|
|
action = match.group(1).strip()
|
|
action_input = match.group(2)
|
|
return AgentAction(action, action_input.strip(" ").strip('"'), text)
|