{"id":2094,"date":"2024-11-04T17:24:05","date_gmt":"2024-11-04T09:24:05","guid":{"rendered":"http:\/\/blog.xtaa.cn\/?p=2094"},"modified":"2024-11-04T17:24:05","modified_gmt":"2024-11-04T09:24:05","slug":"langgraph-studio%ef%bc%9a%e5%8f%af%e8%a7%86%e5%8c%96%e8%b0%83%e8%af%95%e5%9f%ba%e4%ba%8elanggraph%e6%9e%84%e5%bb%ba%e7%9a%84ai%e6%99%ba%e8%83%bd%e4%bd%93","status":"publish","type":"post","link":"http:\/\/blog.xtaa.cn\/index.php\/2024\/11\/04\/langgraph-studio%ef%bc%9a%e5%8f%af%e8%a7%86%e5%8c%96%e8%b0%83%e8%af%95%e5%9f%ba%e4%ba%8elanggraph%e6%9e%84%e5%bb%ba%e7%9a%84ai%e6%99%ba%e8%83%bd%e4%bd%93\/","title":{"rendered":"LangGraph Studio\uff1a\u53ef\u89c6\u5316\u8c03\u8bd5\u57fa\u4e8eLangGraph\u6784\u5efa\u7684AI\u667a\u80fd\u4f53"},"content":{"rendered":"\n<p>\u4e4b\u524d\u6211\u4eec\u5728\u7b2c\u4e00\u65f6\u95f4\u4ecb\u7ecd\u8fc7\u4f7f\u7528LangChain\u7684LangGraph\u5f00\u53d1\u590d\u6742\u7684RAG\u6216\u8005Agent\u5e94\u7528\uff0c\u968f\u7740\u7248\u672c\u7684\u8fed\u4ee3\uff0cLangGraph\u5df2\u7ecf\u6210\u4e3a\u53ef\u4ee5\u72ec\u7acb\u4e8eLangChain\u6838\u5fc3\uff0c\u7528\u4e8e\u5f00\u53d1\u591a\u6b65\u9aa4\u3001\u9762\u5411\u590d\u6742\u4efb\u52a1\u3001\u652f\u6301\u5faa\u73af\u7684AI\u667a\u80fd\u4f53\u7684\u5f3a\u5927\u6846\u67b6\u3002<\/p>\n\n\n\n<p>\u8fd1\u671fLangGraph\u63a8\u51fa\u4e86\u4e00\u4e2a\u4f7f\u5f97\u590d\u6742AI\u667a\u80fd\u4f53\u5f00\u53d1\u66f4\u52a0\u9ad8\u6548\u7684\u5de5\u5177\uff1aLangGraph 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class=\"wp-block-list\">\n<li>\u56de\u987eLangGraph\u5e76\u521b\u5efa\u6d4b\u8bd5\u667a\u80fd\u4f53<\/li>\n<\/ol>\n\n\n\n<p>LangGraph\u662f\u7528\u4e8e\u6784\u5efa\u57fa\u4e8eLLM\u7684\u590d\u6742\u667a\u80fd\u4f53\u7684\u5e95\u5c42\u6846\u67b6\uff08\u6ce8\u610fLangGraph\u5e76\u975e\u7c7b\u4f3c\u4e8eCoze\u8fd9\u6837\u7684\u4f4e\u4ee3\u7801Agent\u6784\u5efa\u5e73\u53f0\uff09\uff0c\u5b83\u7684\u786e\u66f4\u590d\u6742\u4f46\u4e5f\u66f4\u5f3a\u5927\uff08\u4e0e\u5176\u7c7b\u4f3c\u7684\u662f\u53e6\u4e00\u5bb6\u4e3b\u6d41\u6846\u67b6LlamaIndex\u63a8\u51fa\u7684Workflows\uff09\u3002\u4e3b\u8981\u7279\u70b9\u6709\uff1a<\/p>\n\n\n\n<p>**\u57fa\u4e8e\u56fe\u7ed3\u6784\u5b9a\u4e49\u7684AI\u5de5\u4f5c\u6d41<br>**<\/p>\n\n\n\n<p>**\u652f\u6301\u590d\u6742\u7684\u5faa\u73af\u4e0e\u6761\u4ef6\u5206\u652f<br>**<\/p>\n\n\n\n<p>**\u7ec6\u7c92\u5ea6\u7684\u667a\u80fd\u4f53\u63a7\u5236\uff0c\u800c\u975e\u667a\u80fd\u4f53\u201c\u9ed1\u76d2\u5b50\u201d<br>**<\/p>\n\n\n\n<p>\u667a\u80fd\u4f53\u72b6\u6001\u7684\u6301\u4e45\u5316\uff0c\u53ef\u5355\u6b65\u63a7\u5236\u3001\u6682\u505c\u4e0e\u6062\u590d<\/p>\n\n\n\n<p>\u652f\u6301\u591a\u667a\u80fd\u4f53\u5f00\u53d1\u3001\u4eba\u673a\u4ea4\u4e92\u5de5\u4f5c\u6d41<\/p>\n\n\n\n<p>\u73b0\u5728\u8ba9\u6211\u4eec\u53c2\u8003\u5b98\u65b9\u5e94\u7528\u6784\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u6d4b\u8bd5\u667a\u80fd\u4f53\uff0c\u8fd9\u4e2a\u667a\u80fd\u4f53\u7684Graph\u56fe\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p>\u8fd9\u662f\u4e00\u4e2a\u975e\u5e38\u7b80\u5355\u7684\u667a\u80fd\u4f53\uff0c\u6d41\u7a0b\u63cf\u8ff0\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p>\u7528\u6237\u8f93\u5165\u95ee\u9898<\/p>\n\n\n\n<p>\u8c03\u7528LLM\u83b7\u5f97\u95ee\u9898\u7b54\u6848\uff0c\u5e76\u51b3\u5b9a\u662f\u5426\u9700\u8981\u8c03\u7528\u641c\u7d22\u5de5\u5177<\/p>\n\n\n\n<p>\u5982\u679c\u9700\u8981\uff0c\u5219\u8c03\u7528\u641c\u7d22\u5f15\u64ce\u83b7\u5f97\u7ed3\u679c\uff0c\u5e76\u8fd4\u56de\u7ed9LLM\u7ee7\u7eed<\/p>\n\n\n\n<p>\u5982\u679c\u4e0d\u518d\u9700\u8981\u641c\u7d22\uff0c\u5219\u7ed9\u51fa\u7b54\u6848\uff0c\u6d41\u7a0b\u7ed3\u675f<\/p>\n\n\n\n<p>\u73b0\u5728\u4f7f\u7528LangGraph\u5b9e\u73b0\u8fd9\u4e2a\u667a\u80fd\u4f53\uff1a<\/p>\n\n\n\n<p>\u3010\u5b9a\u4e49State\u3011<\/p>\n\n\n\n<p>\u5b9a\u4e49\u5728\u5de5\u4f5c\u6d41\u4e2d\u4f20\u9012\u4e0e\u4fdd\u6301\u7684\u201c\u72b6\u6001\u201d\u6570\u636e\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3a\u5168\u5c40\u5171\u4eab\u6570\u636e\uff1a<\/p>\n\n\n\n<p><br><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from typing import TypedDict,TypedDict, Annotated, Sequence   from langgraph.graph import StateGraph, END   from langgraph.graph import add_messages   from langchain_core.messages import BaseMessage   from langchain_openai import ChatOpenAI   from langgraph.prebuilt import ToolNode   from langchain_community.tools.tavily_search import TavilySearchResults      class AgentState(TypedDict):`        `messages: Annotated&#91;Sequence&#91;BaseMessage], add_messages]<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\n\n\n\n<strong>\u3010\u5b9a\u4e49Node\u3011<\/strong><\/code><\/pre>\n\n\n\n<p>\u5b9a\u4e49\u4e00\u4e2a\u5de5\u4f5c\u6d41\u4e2d\u7684\u5904\u7406\u8282\u70b9\uff0c\u8fd9\u91cc\u4e3b\u8981\u6709\u4e24\u4e2a\uff1aLLM\u8c03\u7528\u4e0e\u641c\u7d22\u5f15\u64ce\u8c03\u7528\u3002\u53e6\u5916\u5b9a\u4e49\u4e00\u4e2a\u8f85\u52a9\u5224\u65ad\u65b9\u6cd5\uff0c\u7528\u6765\u51b3\u5b9a\u662f\u5426\u9700\u8981\u8c03\u7528\u641c\u7d22\u5f15\u64ce\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u8c03\u7528\u641c\u7d22\u5f15\u64ce\u7684\u5de5\u5177\u8282\u70b9\uff0c\u5229\u7528ToolNode\u6784\u5efa  \ntools = &#91;TavilySearchResults(max_results=1)]  \ntool_node = ToolNode(tools)  \n  \n# \u8c03\u7528\u5927\u6a21\u578b  \ndef call_llm(state):  \n    messages = state&#91;\"messages\"]  \n    messages = &#91;{\"role\": \"system\", \"content\": \"\u4f60\u662f\u4e00\u4e2a\u4e2d\u6587\u667a\u80fd\u5c0f\u52a9\u624b\u3002\"}] + messages  \n    model = ChatOpenAI(temperature=0, model_name=\"gpt-4o-mini\")  \n    model = model.bind_tools(tools)  \n    response = model.invoke(messages)  \n    return {\"messages\": &#91;response]}  \n  \n# \u4e00\u4e2a\u8f85\u52a9\u65b9\u6cd5\uff1a\u5224\u65ad\u662f\u5426\u9700\u8981\u8c03\u7528\u5de5\u5177  \ndef should_continue(state):  \n    messages = state&#91;\"messages\"]  \n    last_message = messages&#91;-1]  \n  \n    #\u6839\u636e\u5927\u6a21\u578b\u7684\u53cd\u9988\u6765\u51b3\u5b9a\u662f\u7ed3\u675f\uff0c\u8fd8\u662f\u8c03\u7528\u5de5\u5177  \n    if not last_message.tool_calls:  \n        return \"end\"  \n    else:  \n        return \"continue\"<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>\u3010\u5b9a\u4e49Graph\u3011<\/strong><\/p>\n\n\n\n<p>\u73b0\u5728\u4f60\u53ef\u4ee5\u5b9a\u4e49Graph &#8211; \u4e5f\u5c31\u662f\u667a\u80fd\u4f53\u7684\u5de5\u4f5c\u6d41\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u5b9a\u4e49\u4e00\u4e2agraph  \nworkflow = StateGraph(AgentState)  \n  \n# \u589e\u52a0\u4e24\u4e2a\u8282\u70b9  \nworkflow.add_node(\"llm\", call_llm)  \nworkflow.add_node(\"search\", tool_node)  \n  \n# \u786e\u5b9a\u5165\u53e3  \nworkflow.set_entry_point(\"llm\")  \n  \n# \u4e00\u4e2a\u6761\u4ef6\u8fb9\uff0c\u5373\u4ecellm\u8282\u70b9\u51fa\u6765\u7684\u4e24\u4e2a\u5206\u652f\u53ca\u6761\u4ef6  \nworkflow.add_conditional_edges(  \n    \"llm\",  \n    should_continue,  \n    {  \n        \"continue\": \"search\",  \n        \"end\": END,  \n    },  \n)  \n  \n# search\u8c03\u7528\u540e\u8fd4\u56dellm  \nworkflow.add_edge(\"search\", \"llm\")  \n  \n#\u7f16\u8bd1  \ngraph = workflow.compile()  \n  \n#\u672c\u5730\u6d4b\u8bd5\u4ee3\u7801  \nif __name__ == \"__main__\":  \n    while True:  \n        user_input = input(\"User: \")  \n        print(\"User: \"+ user_input)  \n        if user_input.lower() in &#91;\"quit\", \"exit\", \"q\"]:  \n            print(\"Goodbye!\")  \n            break  \n          \n        response = graph.invoke({\"messages\": &#91;(\"user\", user_input)]})  \n        print(response&#91;\"messages\"]&#91;-1].content)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u52a0\u4e0a\u4e86\u672c\u5730\u6d4b\u8bd5\u4ee3\u7801\uff0c\u521b\u5efa\u5b8c\u6210\u540e\u53ef\u4ee5\u5728\u672c\u5730\u8fd0\u884c\u6d4b\u8bd5\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>LangGraph Studio\u662f\u4ec0\u4e48\uff1f<\/li>\n<\/ol>\n\n\n\n<p>LangGraph Studio\u662fLangChain\u63a8\u51fa\u7684\u4e13\u95e8\u7528\u4e8e\u590d\u6742\u667a\u80fd\u4f53\u4e0eRAG\u5e94\u7528\u53ef\u89c6\u5316\u3001\u4ea4\u4e92\u4e0e\u8c03\u8bd5\u7684\u684c\u9762\u96c6\u6210\u5f00\u53d1\u73af\u5883\u3002\u501f\u52a9\u4e8eLangGraph Studio\uff0c\u4f60\u53ef\u4ee5\u975e\u5e38\u76f4\u89c2\u7684\u89c2\u5bdf\u6240\u521b\u5efa\u7684AI\u667a\u80fd\u4f53\u7684\u5de5\u4f5c\u6d41\u7a0b\uff0c\u5e76\u4e0e\u5176\u8fdb\u884c\u4ea4\u4e92\u6765\u8c03\u8bd5\u5b83\u7684\u591a\u6b65\u9aa4\u4efb\u52a1\uff0c\u76d1\u63a7\u5404\u4e2a\u6b65\u9aa4\u7684\u72b6\u6001\u4e0e\u8f93\u5165\u8f93\u51fa\uff0c\u4ece\u800c\u66f4\u5feb\u7684\u53d1\u73b0\u6545\u969c\u4e0e\u4fee\u590d\u3002<\/p>\n\n\n\n<p>\u9700\u8981\u6ce8\u610f\u7684\u51e0\u70b9\u662f\uff1a<\/p>\n\n\n\n<p>LangGraph Studio\u4e0d\u662f\u4e00\u4e2a\u5feb\u901f\u521b\u5efaLangGraph\u667a\u80fd\u4f53\u7684\u5f00\u53d1\u5e73\u53f0\uff08\u81f3\u5c11\u76ee\u524d\u8fd8\u4e0d\u662f\uff09\u3002<\/p>\n\n\n\n<p>LangGraph Studio\u7684\u8c03\u8bd5\u662f\u9488\u5bf9LangGraph\u667a\u80fd\u4f53\u7684Cloud\u90e8\u7f72\u6a21\u5f0f\uff0c\u5373\uff1a\u5c06\u667a\u80fd\u4f53\u90e8\u7f72\u5728\u72ec\u7acb\u7684API Server\u4e2d\uff0c\u5e76\u901a\u8fc7API\u8c03\u7528\u667a\u80fd\u4f53\u3002<\/p>\n\n\n\n<p>\u4f7f\u7528\u65f6\uff0cLangGraph Studio\u4f1a\u628a\u4f60\u7684\u667a\u80fd\u4f53\u6253\u5305\u6210docker image\uff0c\u5e76\u5728\u672c\u5730\u542f\u52a8\u6d4b\u8bd5\u7684API Server\u3002\u539f\u7406\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n\n<p>LangGraph Studio\u4f7f\u7528\u9700\u8981LangSmith\u7684\u8d26\u53f7\uff0c\u53ef\u4ee5\u53bbLangSmith\u514d\u8d39\u6ce8\u518c\uff0c\u5e76\u83b7\u5f97LangSmith\u7684API_Key\u3002<\/p>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u7528LangGraph Studio\u5728\u672c\u5730\u52a0\u8f7d\u667a\u80fd\u4f53<\/li>\n<\/ol>\n\n\n\n<p>\u3010\u51c6\u5907\u5de5\u4f5c\uff1aDocker\u5b89\u88c5\u3011<\/p>\n\n\n\n<p>\u7531\u4e8eLangGraph Studio\u9700\u8981\u542f\u52a8\u4e00\u4e2aDocker\u4f5c\u4e3aAPI Server\uff0c\u56e0\u6b64\u4f9d\u8d56\u4e8eDocker Engine\uff0c\u8bf7\u9996\u5148\u5b89\u88c5Docker 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