■ RetryOutputParser 클래스를 사용해 파싱 오류 발생시 모델을 다시 실행해 새로운 출력을 얻어 재시도하는 방법을 보여준다.
※ OPENAI_API_KEY 환경 변수 값은 .env 파일에 정의한다.
▶ main.py
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from dotenv import load_dotenv from langchain_core.pydantic_v1 import BaseModel from langchain_core.pydantic_v1 import Field from langchain_core.output_parsers import PydanticOutputParser from langchain_core.prompts import PromptTemplate from langchain_openai import OpenAI from langchain.output_parsers import RetryOutputParser from langchain_core.runnables import RunnableParallel from langchain_core.runnables import RunnableLambda load_dotenv() class Action(BaseModel): action : str = Field(description = "action to take" ) action_input : str = Field(description = "input to the action") pydanticOutputParser = PydanticOutputParser(pydantic_object = Action) promptTemplate = PromptTemplate( template = "Answer the user query.\n{format_instructions}\n{query}\n", input_variables = ["query"], partial_variables = {"format_instructions": pydanticOutputParser.get_format_instructions()} ) openAI = OpenAI(temperature = 0) completionRunnableSequence = promptTemplate | openAI retryOutputParser = RetryOutputParser.from_llm(parser = pydanticOutputParser, llm = openAI) executeRunnableSequence = RunnableParallel(completion = completionRunnableSequence, prompt_value = promptTemplate) \ | RunnableLambda(lambda x : retryOutputParser.parse_with_prompt(**x)) action = executeRunnableSequence.invoke({"query" : "who is leo di caprios gf?"}) print(action) """ action='search' action_input='leo di caprios gf' """ |
▶ requirements.txt
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aiohttp==3.9.5 aiosignal==1.3.1 annotated-types==0.7.0 anyio==4.4.0 async-timeout==4.0.3 attrs==23.2.0 certifi==2024.6.2 charset-normalizer==3.3.2 distro==1.9.0 exceptiongroup==1.2.1 frozenlist==1.4.1 greenlet==3.0.3 h11==0.14.0 httpcore==1.0.5 httpx==0.27.0 idna==3.7 jsonpatch==1.33 jsonpointer==3.0.0 langchain==0.2.6 langchain-core==0.2.10 langchain-openai==0.1.10 langchain-text-splitters==0.2.2 langsmith==0.1.82 multidict==6.0.5 numpy==1.26.4 openai==1.35.4 orjson==3.10.5 packaging==24.1 pydantic==2.7.4 pydantic_core==2.18.4 python-dotenv==1.0.1 PyYAML==6.0.1 regex==2024.5.15 requests==2.32.3 sniffio==1.3.1 SQLAlchemy==2.0.31 tenacity==8.4.2 tiktoken==0.7.0 tqdm==4.66.4 typing_extensions==4.12.2 urllib3==2.2.2 yarl==1.9.4 |
※ pip install python-dotenv langchain langchain-openai 명령을 실행했다.