■ Iterator 클래스를 사용해 제너레이터 사용자 정의 함수를 만들고 스트리밍하는 방법을 보여준다.
※ OPENAI_API_KEY 환경 변수 값은 .env 파일에 정의한다.
▶ main.py
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from typing import Iterator, List from dotenv import load_dotenv from langchain_core.prompts import ChatPromptTemplate from langchain_openai import ChatOpenAI from langchain_core.output_parsers import StrOutputParser load_dotenv() def splitIntoList(iterator : Iterator[str]) -> Iterator[List[str]]: buffer = "" for chunkString in iterator: buffer += chunkString while "," in buffer: commaIndex = buffer.index(",") yield [buffer[:commaIndex].strip()] buffer = buffer[commaIndex + 1:] yield [buffer.strip()] chatPromptTemplate = ChatPromptTemplate.from_template("Write a comma-separated list of 5 animals similar to: {animal}. Do not include numbers") chatOpenAI = ChatOpenAI() runnableSequence = chatPromptTemplate | chatOpenAI | StrOutputParser() | splitIntoList for chunkList in runnableSequence.stream({"animal" : "bear"}): print(chunkList, flush = True) """ ['lion'] ['tiger'] ['wolf'] ['fox'] ['raccoon'] """ |
▶ 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 dataclasses-json==0.6.7 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==0.2.5 langchain-community==0.2.5 langchain-core==0.2.9 langchain-openai==0.1.8 langchain-text-splitters==0.2.1 langsmith==0.1.81 marshmallow==3.21.3 multidict==6.0.5 mypy-extensions==1.0.0 numpy==1.26.4 openai==1.35.3 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==8.4.1 tiktoken==0.7.0 tqdm==4.66.4 typing-inspect==0.9.0 typing_extensions==4.12.2 urllib3==2.2.2 yarl==1.9.4 |
※ pip install python-dotenv langchain langchain_openai 명령을 실행했다.