■ create_react_agent 함수의 state_modifier 인자를 사용해 시스템 메시지를 설정하는 방법을 보여준다.
※ OPENAI_API_KEY 환경 변수 값은 .env 파일에 정의한다.
▶ main.py
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from dotenv import load_dotenv from langchain_openai import ChatOpenAI from langchain_core.tools import tool from langchain_core.prompts import ChatPromptTemplate from langgraph.prebuilt.chat_agent_executor import AgentState from langgraph.prebuilt import create_react_agent load_dotenv() chatOpenAI = ChatOpenAI(model = "gpt-4o") @tool def magicFunction(input : int) -> int: """Applies a magic function to an input.""" return input + 2 toolList = [magicFunction] chatPromptTemplate = ChatPromptTemplate.from_messages( [ ("system" , "You are a helpful assistant. Respond only in Spanish."), ("placeholder", "{messages}") ] ) def modifyStateMessageList(agentState : AgentState): chatPromptValue = chatPromptTemplate.invoke({"messages" : agentState["messages"]}) messageList = chatPromptValue.to_messages() finalMessageList = messageList + [("user", "Also say 'Pandamonium!' after the answer.")] return finalMessageList compiledStateGraph = create_react_agent(chatOpenAI, toolList, state_modifier = modifyStateMessageList) query = "what is the value of magic_function(3)?" responseAddableValuesDict = compiledStateGraph.invoke({"messages": [("human", query)]}) print({"input" : query, "output" : responseAddableValuesDict["messages"][-1].content}) """ {'input': 'what is the value of magic_function(3)?', 'output': 'El valor de magic_function(3) es 5. ¡Pandamonium!'} """ |
▶ requirements.txt
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aiohappyeyeballs==2.4.3 aiohttp==3.10.9 aiosignal==1.3.1 annotated-types==0.7.0 anyio==4.6.0 async-timeout==4.0.3 attrs==24.2.0 certifi==2024.8.30 charset-normalizer==3.4.0 distro==1.9.0 exceptiongroup==1.2.2 frozenlist==1.4.1 greenlet==3.1.1 h11==0.14.0 httpcore==1.0.6 httpx==0.27.2 idna==3.10 jiter==0.6.1 jsonpatch==1.33 jsonpointer==3.0.0 langchain==0.3.3 langchain-core==0.3.10 langchain-openai==0.2.2 langchain-text-splitters==0.3.0 langgraph==0.2.35 langgraph-checkpoint==2.0.1 langsmith==0.1.133 msgpack==1.1.0 multidict==6.1.0 numpy==1.26.4 openai==1.51.2 orjson==3.10.7 packaging==24.1 propcache==0.2.0 pydantic==2.9.2 pydantic_core==2.23.4 python-dotenv==1.0.1 PyYAML==6.0.2 regex==2024.9.11 requests==2.32.3 requests-toolbelt==1.0.0 sniffio==1.3.1 SQLAlchemy==2.0.35 tenacity==8.5.0 tiktoken==0.8.0 tqdm==4.66.5 typing_extensions==4.12.2 urllib3==2.2.3 yarl==1.14.0 |
※ pip install python-dotenv langchain langchain-openai langgraph 명령을 실행했다.