■ @chain 데코레이터를 사용해 도구 내에서 실행 가능 항목 호출시 실행 가능 항목에 콜백을 전파하는 방법을 보여준다.
▶ main.py
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import asyncio from langchain_core.runnables import RunnableLambda from langchain_core.runnables import chain async def main(): def reverseWord(word : str): return word[::-1] runnableLambda = RunnableLambda(reverseWord) @chain async def reverseDoubleTool(word : str): return await runnableLambda.ainvoke(word) * 2 async for eventDictionary in reverseDoubleTool.astream_events("1234", version = "v2"): print(eventDictionary) asyncio.run(main()) """ {'event': 'on_chain_start', 'data': {'input': '1234'}, 'name': 'reverseDoubleTool', 'tags': [], 'run_id': '98e36f75-91ed-4f81-90a9-8a8fe1769a6f', 'metadata': {}, 'parent_ids': []} {'event': 'on_chain_stream', 'run_id': '98e36f75-91ed-4f81-90a9-8a8fe1769a6f', 'name': 'reverseDoubleTool', 'tags': [], 'metadata': {}, 'data': {'chunk': '43214321'}, 'parent_ids': []} {'event': 'on_chain_end', 'data': {'output': '43214321'}, 'run_id': '98e36f75-91ed-4f81-90a9-8a8fe1769a6f', 'name': 'reverseDoubleTool', 'tags': [], 'metadata': {}, 'parent_ids': []} """ |
▶ requirements.txt
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aiohttp==3.9.5 aiosignal==1.3.1 annotated-types==0.7.0 async-timeout==4.0.3 attrs==23.2.0 certifi==2024.6.2 charset-normalizer==3.3.2 frozenlist==1.4.1 greenlet==3.0.3 idna==3.7 jsonpatch==1.33 jsonpointer==3.0.0 langchain==0.2.5 langchain-core==0.2.8 langchain-text-splitters==0.2.1 langsmith==0.1.79 multidict==6.0.5 numpy==1.26.4 orjson==3.10.5 packaging==24.1 pydantic==2.7.4 pydantic_core==2.18.4 PyYAML==6.0.1 requests==2.32.3 SQLAlchemy==2.0.30 tenacity==8.4.1 typing_extensions==4.12.2 urllib3==2.2.2 yarl==1.9.4 |
※ pip install langchain 명령을 실행했다.