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Get elements of ActionInput on newlines (#889)

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The re.DOTALL flag in Python's re (regular expression) module makes the
. (dot) metacharacter match newline characters as well as any other
character.

Without re.DOTALL, the . metacharacter only matches any character except
for a newline character. With re.DOTALL, the . metacharacter matches any
character, including newline characters.
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Samantha Whitmore 2023-02-04 20:42:25 -08:00 committed by GitHub
parent 1614c5f5fd
commit 32b11101d3
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langchain/agents/mrkl/base.py
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@ -40,7 +40,7 @@ def get_action_and_input(llm_output: str) -> Tuple[str, str]:
if FINAL_ANSWER_ACTION in llm_output: if FINAL_ANSWER_ACTION in llm_output:
return "Final Answer", llm_output.split(FINAL_ANSWER_ACTION)[-1].strip() return "Final Answer", llm_output.split(FINAL_ANSWER_ACTION)[-1].strip()
regex = r"Action: (.*?)\nAction Input: (.*)" regex = r"Action: (.*?)\nAction Input: (.*)"
match = re.search(regex, llm_output) match = re.search(regex, llm_output, re.DOTALL)
if not match: if not match:
raise ValueError(f"Could not parse LLM output: `{llm_output}`") raise ValueError(f"Could not parse LLM output: `{llm_output}`")
action = match.group(1).strip() action = match.group(1).strip()