{"id":101254,"date":"2026-09-06T13:57:10","date_gmt":"2026-09-06T05:57:10","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/101254.html"},"modified":"2026-09-06T13:57:10","modified_gmt":"2026-09-06T05:57:10","slug":"langchain-agent-01-%e5%a4%a7%e6%a8%a1%e5%9e%8b%e4%b8%ba%e4%bb%80%e4%b9%88%e9%9c%80%e8%a6%81-agent%ef%bc%9acreate_agent-%e4%b8%8e%e4%b8%80%e6%ac%a1%e5%a4%a9%e6%b0%94%e9%97%ae%e7%ad%94","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/101254.html","title":{"rendered":"[LangChain Agent] 01 \u5927\u6a21\u578b\u4e3a\u4ec0\u4e48\u9700\u8981 Agent\uff1acreate_agent \u4e0e\u4e00\u6b21\u5929\u6c14\u95ee\u7b54"},"content":{"rendered":"

\u4e00\u3001\u672c\u7bc7\u8981\u89e3\u51b3\u4ec0\u4e48\u95ee\u9898<\/h3>\n

\u4e0a\u4e00\u5957\u4e13\u680f\u628a RAG \u8d70\u901a\u4e86：\u79c1\u6709\u6587\u6863\u5207\u5757\u3001\u5411\u91cf\u5316\u3001\u68c0\u7d22，\u518d\u585e\u8fdb\u63d0\u793a\u8bcd\u8ba9\u5927\u6a21\u578b\u56de\u7b54\u3002\u68c0\u7d22\u89e3\u51b3\u7684\u662f\u300c\u6a21\u578b\u6ca1\u770b\u8fc7\u4f60\u7684\u8d44\u6599\u300d\u3002<\/p>\n

\u771f\u6b63\u4e0a\u7ebf\u4e4b\u540e，\u8fd8\u4f1a\u649e\u4e0a\u53e6\u4e00\u7c7b\u9700\u6c42：\u7528\u6237\u4e0d\u662f\u53ea\u8981\u4e00\u6bb5\u6587\u5b57，\u800c\u662f\u8981\u67e5\u4e00\u4e0b\u73b0\u5728\u7684\u5929\u6c14\u3001\u8bfb\u4e00\u4e0b\u80a1\u4ef7\u3001\u7b97\u4e00\u4e2a BMI\u3002\u8fd9\u4e9b\u4fe1\u606f\u4e0d\u5728\u77e5\u8bc6\u5e93\u91cc，\u4e5f\u4e0d\u8be5\u5199\u6b7b\u5728 Prompt \u91cc，\u5b83\u4eec\u6765\u81ea\u51fd\u6570\u3001\u63a5\u53e3\u3001\u6570\u636e\u5e93\u3002<\/p>\n

\u672c\u7bc7\u53ea\u628a\u7b2c\u4e00\u5757\u5730\u57fa\u6253\u5b9e：<\/p>\n

Agent（\u667a\u80fd\u4f53）\u662f\u4ec0\u4e48\u3001\u4e3a\u4ec0\u4e48 RAG \u4e0d\u591f\u3001create_agent \u600e\u4e48\u7528\u4e09\u4e2a\u53c2\u6570\u8dd1\u901a\u4e00\u6b21\u5929\u6c14\u95ee\u7b54\u3002<\/p>\n<\/p>\n

1.1 \u5b66\u4e60\u76ee\u6807<\/h4>\n
  • \n

    \u80fd\u7528\u4e00\u53e5\u8bdd\u8bf4\u6e05 Agent \u548c RAG\u3001Chain \u7684\u5dee\u522b<\/p>\n<\/li>\n

  • \n

    \u7406\u89e3 create_agent \u7684\u4e09\u4ef6\u5957：\u6a21\u578b\u3001\u5de5\u5177\u3001\u7cfb\u7edf\u63d0\u793a<\/p>\n<\/li>\n

  • \n

    \u4f1a\u7528 @tool \u628a\u666e\u901a Python \u51fd\u6570\u4ea4\u7ed9\u667a\u80fd\u4f53<\/p>\n<\/li>\n

  • \n

    \u80fd\u8bfb\u61c2 invoke \u8fd4\u56de\u503c\u91cc\u90a3\u4e32 messages <\/p>\n<\/li>\n

    <\/h4>\n

    1.2 \u4e00\u53e5\u516c\u5f0f<\/h4>\n

    Agent = LLM（\u5927\u8111）+ Tools（\u624b）+ \u5faa\u73af（\u5148\u60f3\u518d\u505a\u518d\u770b）<\/p>\n

    RAG \u662f\u300c\u5148\u627e\u8d44\u6599\u518d\u751f\u6210\u300d\u3002Agent \u662f\u300c\u5148\u5224\u65ad\u8981\u4e0d\u8981\u52a8\u624b，\u52a8\u624b\u540e\u518d\u6839\u636e\u7ed3\u679c\u8bf4\u8bdd\u300d\u3002<\/p>\n<\/p>\n

    \u4e8c\u3001\u4ece RAG \u5230 Agent<\/h3>\n

    <\/h4>\n

    2.1 RAG \u5df2\u7ecf\u89e3\u51b3\u4e86\u4ec0\u4e48<\/h4>\n\n\u95ee\u9898RAG \u7684\u505a\u6cd5<\/tr>\n\n\n\n\n\n
    \u77e5\u8bc6\u8fc7\u65f6<\/td>\n\u79bb\u7ebf\u628a\u65b0\u6587\u6863\u5199\u5165\u5411\u91cf\u5e93<\/td>\n<\/tr>\n
    \u4e0d\u61c2\u884c\u4e1a\u9ed1\u8bdd<\/td>\n\u68c0\u7d22\u4f01\u4e1a\u5185\u90e8\u624b\u518c\u518d\u751f\u6210<\/td>\n<\/tr>\n
    \u5bb9\u6613\u5e7b\u89c9<\/td>\n\u7b54\u6848\u5fc5\u987b\u57fa\u4e8e\u68c0\u7d22\u7247\u6bb5<\/td>\n<\/tr>\n
    \u79c1\u6709\u6570\u636e\u4e0d\u80fd\u62ff\u53bb\u5fae\u8c03<\/td>\n\u8d44\u6599\u653e\u672c\u5730，\u53ea\u5728\u63d0\u95ee\u65f6\u53d6\u51fa\u51e0\u6bb5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u8fd9\u4e9b\u80fd\u529b\u4ecd\u7136\u6709\u7528\u3002\u540e\u9762\u505a Agent \u65f6，\u68c0\u7d22\u672c\u8eab\u4e5f\u53ef\u4ee5\u53d8\u6210\u5176\u4e2d\u4e00\u628a\u5de5\u5177，\u800c\u4e0d\u662f\u552f\u4e00\u901a\u8def\u3002<\/p>\n

    <\/h4>\n

    2.2 RAG \u8fd8\u505a\u4e0d\u5230\u4ec0\u4e48<\/h4>\n

    \u7528\u6237\u95ee\u300c\u660e\u5929\u6df1\u5733\u7684\u5929\u6c14\u5982\u4f55\u300d，\u5411\u91cf\u5e93\u91cc\u901a\u5e38\u6ca1\u6709\u660e\u5929\u7684\u9884\u62a5\u3002\u4f60\u5c31\u7b97\u628a\u53bb\u5e74\u7684\u6c14\u8c61\u8bf4\u660e\u68c0\u7d22\u51fa\u6765，\u6a21\u578b\u4e5f\u53ea\u80fd\u590d\u8ff0\u65e7\u6587\u672c，\u4e0d\u80fd\u53bb\u8c03\u5929\u6c14\u63a5\u53e3\u3002<\/p>\n

    \u518d\u6781\u7aef\u4e00\u70b9：\u7528\u6237\u8bf4\u300c\u5e2e\u6211\u7b97 BMI\u300d\u3002\u68c0\u7d22\u80fd\u7ffb\u5230\u516c\u5f0f，\u4f46\u5f53\u524d\u8eab\u9ad8\u4f53\u91cd\u4e0d\u5728\u6587\u6863\u91cc，\u5fc5\u987b\u8c03\u7528\u4e1a\u52a1\u51fd\u6570\u3002<\/p>\n

    \u6240\u4ee5：<\/p>\n

      \n
    • \n

      RAG：\u7ed9\u6a21\u578b\u770b\u8d44\u6599<\/p>\n<\/li>\n

    • \n

      Agent：\u7ed9\u6a21\u578b\u4e00\u53cc\u624b，\u8ba9\u5b83\u81ea\u5df1\u51b3\u5b9a\u4f55\u65f6\u4f38\u624b<\/p>\n<\/li>\n<\/ul>\n

      <\/h4>\n

      2.3 \u4e09\u79cd\u5f62\u6001\u5bf9\u6bd4<\/h4>\n\n\u666e\u901a LLMRAGAgent<\/tr>\n\n\n\n\n\n
      \u8f93\u5165<\/td>\n\u7528\u6237\u4e00\u53e5\u8bdd<\/td>\n\u7528\u6237\u95ee\u9898 + \u68c0\u7d22\u7247\u6bb5<\/td>\n\u7528\u6237\u95ee\u9898 + \u53ef\u7528\u5de5\u5177\u5217\u8868<\/td>\n<\/tr>\n
      \u8fc7\u7a0b<\/td>\n\u4e00\u6b21\u751f\u6210<\/td>\n\u68c0\u7d22\u4e00\u6b21，\u751f\u6210\u4e00\u6b21<\/td>\n\u53ef\u80fd\u591a\u8f6e：\u601d\u8003 \u2192 \u8c03\u5de5\u5177 \u2192 \u518d\u601d\u8003<\/td>\n<\/tr>\n
      \u8f93\u51fa<\/td>\n\u6587\u672c<\/td>\n\u57fa\u4e8e\u8d44\u6599\u7684\u6587\u672c<\/td>\n\u6587\u672c，\u4ee5\u53ca\u4e2d\u95f4\u4ea7\u751f\u7684\u5de5\u5177\u8c03\u7528<\/td>\n<\/tr>\n
      \u5178\u578b\u5931\u8d25<\/td>\n\u4e0d\u61c2\u79c1\u6709\u77e5\u8bc6<\/td>\n\u8d44\u6599\u91cc\u6ca1\u6709\u300c\u73b0\u5728\u300d\u300c\u6211\u7684\u300d<\/td>\n\u5de5\u5177\u63cf\u8ff0\u542b\u7cca，\u8c03\u9519\u6216\u6f0f\u8c03<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u8bfe\u4ef6\u4ee3\u7801\u628a Agent \u7684\u7b2c\u4e00\u8bfe\u538b\u5230 20 \u591a\u884c：\u4e0d\u95ee\u6846\u67b6\u53f2，\u5148\u8ba9\u6a21\u578b\u771f\u7684\u53bb\u8c03\u4e00\u4e2a\u51fd\u6570\u3002<\/p>\n<\/p>\n

      \u4e09\u3001Agent \u6807\u51c6\u5de5\u4f5c\u6d41<\/h3>\n

      \u4e00\u6b21\u5e26\u5de5\u5177\u7684\u95ee\u7b54，\u5e95\u5c42\u4e0d\u662f\u300c\u6a21\u578b\u76f4\u63a5\u628a\u5929\u6c14\u8bf4\u51fa\u6765\u300d，\u800c\u662f\u4e00\u5f20\u5f88\u77ed\u7684\u5faa\u73af：<\/p>\n

      \u7528\u6237\u6d88\u606f
      \n \u2502
      \n \u25bc
      \n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
      \n\u2502 LLM \u601d\u8003 \u2502 \u8981\u4e0d\u8981\u7528\u5de5\u5177？\u7528\u54ea\u4e00\u4e2a？\u53c2\u6570\u662f\u4ec0\u4e48？
      \n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2518
      \n \u2502 \u9700\u8981\u5de5\u5177
      \n \u25bc
      \n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
      \n\u2502 \u6267\u884c Tool \u2502 \u8dd1\u4f60\u5199\u7684 Python \u51fd\u6570
      \n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2518
      \n \u2502 \u89c2\u5bdf\u7ed3\u679c
      \n \u25bc
      \n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
      \n\u2502 LLM \u518d\u601d\u8003 \u2502 \u62ff\u5de5\u5177\u8fd4\u56de\u503c\u7ec4\u7ec7\u6700\u7ec8\u56de\u7b54
      \n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n

      LangChain 1.x \u628a\u8fd9\u5f20\u5faa\u73af\u6536\u8fdb\u4e00\u4e2a\u5165\u53e3：create_agent\u3002\u4f60\u4e0d\u518d\u624b\u5199\u300c\u5148 bind_tools\u3001\u518d\u89e3\u6790 tool_calls\u3001\u518d\u62fc ToolMessage\u300d\u90a3\u4e00\u957f\u4e32\u6837\u677f，\u53ea\u8981\u4ea4\u51fa\u5927\u8111\u3001\u5de5\u5177\u6e05\u5355\u3001\u4eba\u8bbe\u3002<\/p>\n<\/p>\n

      3.1 \u4e09\u4ef6\u5957<\/h4>\n\n\u53c2\u6570\u4ee3\u7801\u91cc\u7684\u89d2\u8272\u672c\u8bfe\u53d6\u503c<\/tr>\n\n\n\n\n
      model<\/td>\n\u667a\u80fd\u4f53\u7684\u5927\u8111<\/td>\nChatTongyi(model="qwen3-max")<\/td>\n<\/tr>\n
      tools<\/td>\n\u80fd\u8c03\u7528\u7684\u51fd\u6570\u5217\u8868<\/td>\n[get_weather]<\/td>\n<\/tr>\n
      system_prompt<\/td>\n\u4eba\u8bbe\u4e0e\u7eaa\u5f8b<\/td>\n\u300c\u4f60\u662f\u4e00\u4e2a\u804a\u5929\u52a9\u624b，\u53ef\u4ee5\u56de\u7b54\u7528\u6237\u95ee\u9898\u3002\u300d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u5c11\u4efb\u4f55\u4e00\u4ef6\u90fd\u4f1a\u53d8\u5473：\u6ca1\u6709\u5de5\u5177，\u5b83\u53ea\u662f\u804a\u5929\u6a21\u578b；\u6ca1\u6709\u7cfb\u7edf\u63d0\u793a，\u5b83\u4ecd\u80fd\u8dd1，\u4f46\u98ce\u683c\u548c\u7ea6\u675f\u5168\u9760\u9ed8\u8ba4；\u6ca1\u6709\u8db3\u591f\u5f3a\u7684\u6a21\u578b，\u5b83\u751a\u81f3\u4e0d\u4f1a\u53d1\u51fa\u5408\u6cd5\u7684\u5de5\u5177\u8c03\u7528\u3002<\/p>\n

      <\/h4>\n

      3.2 \u5faa\u73af\u4ec0\u4e48\u65f6\u5019\u505c<\/h4>\n

      \u6a21\u578b\u67d0\u4e00\u8f6e\u51b3\u5b9a\u4e0d\u518d\u8c03\u7528\u5de5\u5177，\u53ea\u4ea7\u51fa\u5bf9\u7528\u6237\u7684\u81ea\u7136\u8bed\u8a00，\u5faa\u73af\u5c31\u7ed3\u675f\u3002invoke \u4f1a\u628a\u6574\u6bb5\u8f68\u8ff9\u88c5\u8fdb res["messages"]，\u4ece\u5934\u5230\u5c3e\u90fd\u80fd\u56de\u653e\u3002<\/p>\n<\/p>\n

      \u56db\u3001create_agent \u521d\u4f53\u9a8c<\/h3>\n

      \u5bf9\u7167\u6587\u4ef6：P5_Agent\u667a\u80fd\u4f53\/01Agent\u667a\u80fd\u4f53\u521d\u4f53\u9a8c.py\u3002<\/p>\n

      <\/h4>\n

      4.1 \u5bfc\u5165\u4e0e\u6a21\u578b<\/h4>\n

      from langchain.agents import create_agent
      \nfrom langchain_community.chat_models.tongyi import ChatTongyi
      \nfrom langchain_core.tools import tool<\/p>\n

      \u4e09\u884c\u5404\u7ba1\u4e00\u5c42：<\/p>\n

        \n
      • \n

        create_agent：\u7ec4\u88c5\u667a\u80fd\u4f53（LangChain 1.x \u7684\u6807\u51c6\u5165\u53e3）<\/p>\n<\/li>\n

      • \n

        ChatTongyi：\u901a\u4e49\u5343\u95ee\u804a\u5929\u6a21\u578b，\u548c RAG \u4e13\u680f\u7528\u7684\u662f\u540c\u4e00\u5957\u793e\u533a\u96c6\u6210<\/p>\n<\/li>\n

      • \n

        tool：\u628a\u666e\u901a\u51fd\u6570\u767b\u8bb0\u6210\u6a21\u578b\u80fd\u300c\u770b\u89c1\u300d\u7684\u5de5\u5177<\/p>\n<\/li>\n<\/ul>\n

        \u5927\u8111\u8fd9\u4e00\u884c，\u6ce8\u91ca\u5199\u5f97\u5f88\u76f4\u767d：<\/p>\n

        model=ChatTongyi(model="qwen3-max"), # \u667a\u80fd\u4f53\u7684\u5927\u8111LLM<\/p>\n

        qwen3-max \u8981\u80fd\u7a33\u5b9a\u4ea7\u51fa tool call\u3002\u6559\u5b66\u73af\u5883\u6cbf\u7528\u963f\u91cc\u4e91\u5bc6\u94a5\u5373\u53ef，\u548c\u524d\u9762\u8c03\u7528\u901a\u4e49\u5343\u95ee\u7684\u65b9\u5f0f\u4e00\u81f4\u3002<\/p>\n

        <\/h4>\n

        4.2 \u7528 @tool \u58f0\u660e\u5de5\u5177<\/h4>\n

        @tool(description="\u67e5\u8be2\u5929\u6c14")
        \ndef get_weather() -> str:
        \n return "\u6674\u5929"<\/p>\n

        \u8fd9\u91cc\u6709\u4e09\u4e2a\u503c\u5f97\u76ef\u4f4f\u7684\u7ec6\u8282\u3002<\/p>\n

        4.2.1 description \u662f\u7ed9\u6a21\u578b\u770b\u7684\u8bf4\u660e\u4e66<\/h5>\n

        \u6a21\u578b\u770b\u4e0d\u89c1\u51fd\u6570\u4f53，\u53ea\u770b\u89c1\u540d\u5b57\u548c\u63cf\u8ff0\u3002description="\u67e5\u8be2\u5929\u6c14" \u51b3\u5b9a\u4e86\u5b83\u4f1a\u4e0d\u4f1a\u5728\u300c\u660e\u5929\u6df1\u5733\u7684\u5929\u6c14\u5982\u4f55\u300d\u8fd9\u79cd\u95ee\u9898\u4e0a\u4f38\u624b\u3002\u63cf\u8ff0\u5199\u7cca\u4e86，\u6a21\u578b\u53ef\u80fd\u76f4\u63a5\u778e\u7f16\u5929\u6c14，\u5de5\u5177\u5c31\u6210\u4e86\u6446\u8bbe\u3002<\/p>\n

        4.2.2 \u8fd4\u56de\u503c\u4f1a\u88ab\u5f53\u6210\u300c\u89c2\u5bdf\u300d<\/h5>\n

        \u51fd\u6570\u8fd4\u56de "\u6674\u5929"，\u4e0b\u4e00\u8f6e\u6a21\u578b\u770b\u5230\u7684\u4e0d\u662f\u4f60\u7684 Python \u53d8\u91cf，\u800c\u662f\u4e00\u6761\u5de5\u5177\u6d88\u606f：\u5929\u6c14\u5de5\u5177\u8bf4，\u7ed3\u679c\u662f\u6674\u5929\u3002\u6700\u7ec8\u56de\u7b54\u662f\u6a21\u578b\u6839\u636e\u8fd9\u6761\u89c2\u5bdf\u7ec4\u7ec7\u51fa\u6765\u7684，\u4e0d\u662f return \u76f4\u63a5\u6253\u5370\u7ed9\u7528\u6237\u3002<\/p>\n

        4.2.3 \u672c\u8bfe\u5de5\u5177\u6545\u610f\u6ca1\u6709\u57ce\u5e02\u53c2\u6570<\/h5>\n

        get_weather() \u4e0d\u63a5\u6536\u57ce\u5e02，\u4e5f\u4e0d\u67e5\u771f\u5b9e\u63a5\u53e3，\u6c38\u8fdc\u8fd4\u56de\u300c\u6674\u5929\u300d\u3002\u8fd9\u662f\u6559\u5b66\u6869，\u7528\u6765\u8bc1\u660e：\u6a21\u578b\u4f1a\u4e0d\u4f1a\u8c03\u7528\u5de5\u5177，\u800c\u4e0d\u662f\u8bc1\u660e\u6c14\u8c61 API \u600e\u4e48\u7b7e\u3002<\/p>\n<\/p>\n

        4.3 \u7ec4\u88c5\u667a\u80fd\u4f53<\/h4>\n

        agent = create_agent(
        \n model=ChatTongyi(model="qwen3-max"), # \u667a\u80fd\u4f53\u7684\u5927\u8111LLM
        \n tools=[get_weather], # \u5411\u667a\u80fd\u4f53\u63d0\u4f9b\u5de5\u5177\u5217\u8868
        \n system_prompt="\u4f60\u662f\u4e00\u4e2a\u804a\u5929\u52a9\u624b，\u53ef\u4ee5\u56de\u7b54\u7528\u6237\u95ee\u9898\u3002",
        \n)<\/p>\n

        tools \u5fc5\u987b\u662f\u5217\u8868\u3002\u54ea\u6015\u53ea\u6709\u4e00\u628a\u5de5\u5177，\u4e5f\u8981\u5199\u6210 [get_weather]\u3002\u540e\u9762\u80a1\u4ef7\u3001BMI \u90fd\u662f\u5f80\u8fd9\u4e2a\u5217\u8868\u91cc\u52a0\u51fd\u6570，\u7ec4\u88c5\u65b9\u5f0f\u4e0d\u53d8\u3002<\/p>\n

        system_prompt \u672c\u8bfe\u5199\u5f97\u5f88\u677e\u3002\u7b2c 02\u300103 \u7bc7\u4f1a\u628a\u5b83\u6536\u7d27：\u5148\u8981\u6c42\u300c\u544a\u77e5\u601d\u8003\u8fc7\u7a0b\u300d，\u518d\u8981\u6c42\u300c\u4e25\u683c ReAct\u3001\u6bcf\u8f6e\u53ea\u8c03\u4e00\u4e2a\u5de5\u5177\u300d\u3002\u540c\u4e00\u5957 create_agent，\u7eaa\u5f8b\u5168\u5199\u5728\u8fd9\u53e5\u8bdd\u91cc\u3002<\/p>\n

        <\/h4>\n

        4.4 invoke \u4e00\u6b21\u5929\u6c14\u95ee\u7b54<\/h4>\n

        res = agent.invoke(
        \n {
        \n "messages": [
        \n {"role": "user", "content": "\u660e\u5929\u6df1\u5733\u7684\u5929\u6c14\u5982\u4f55？"},
        \n ]
        \n }
        \n)<\/p>\n

        \u8c03\u7528\u7ea6\u5b9a：<\/p>\n

      • \n

        \u5165\u53c2\u662f\u72b6\u6001\u5b57\u5178，\u4e0d\u662f\u88f8\u5b57\u7b26\u4e32<\/p>\n<\/li>\n

      • \n

        \u7528\u6237\u95ee\u9898\u653e\u5728 messages \u91cc，\u7528 OpenAI \u98ce\u683c\u7684 role \/ content \u5373\u53ef<\/p>\n<\/li>\n

      • \n

        invoke \u963b\u585e\u5230\u6574\u8f6e\u5faa\u73af\u7ed3\u675f，\u4e00\u6b21\u6027\u8fd4\u56de\u6700\u7ec8\u72b6\u6001<\/p>\n<\/li>\n

        \u548c RAG \u4e13\u680f\u91cc model.invoke("\u4f60\u597d") \u4e0d\u540c：Agent \u7684\u8f93\u5165\u8f93\u51fa\u90fd\u4ee5 messages \u4e3a\u4e2d\u5fc3\u3002\u540e\u9762 stream\u3001\u4e2d\u95f4\u4ef6\u8bfb\u7684\u90fd\u662f\u8fd9\u4efd\u72b6\u6001\u3002<\/p>\n<\/p>\n

        \u4e94\u3001\u8fd4\u56de\u503c\u91cc\u7684\u6d88\u606f\u94fe\u8def<\/h3>\n

        <\/h4>\n

        5.1 \u4e3a\u4ec0\u4e48\u8981\u904d\u5386 messages<\/h4>\n

        for msg in res["messages"]:
        \n print(type(msg).__name__, msg.content)<\/p>\n

        res \u4e0d\u662f\u4e00\u53e5\u6700\u7ec8\u7b54\u6848，\u800c\u662f\u6574\u6bb5\u5bf9\u8bdd\u8f68\u8ff9\u3002\u53ea\u6253\u5370\u6700\u540e\u4e00\u4e2a content，\u4f60\u53ea\u80fd\u770b\u5230\u300c\u660e\u5929\u6df1\u5733\u6674\u5929，\u9002\u5408\u2026\u2026\u300d，\u770b\u4e0d\u5230\u4e2d\u95f4\u5230\u5e95\u8c03\u6ca1\u8c03\u5de5\u5177\u3002<\/p>\n

        \u8bfe\u7a0b\u9009\u62e9\u6253\u5370 type(msg).__name__ \u548c msg.content，\u5c31\u662f\u4e3a\u4e86\u628a\u7c7b\u578b\u548c\u6b63\u6587\u5e76\u6392\u51fa\u6765：\u54ea\u4e00\u6761\u662f\u4eba\u8bf4\u7684，\u54ea\u4e00\u6761\u662f\u6a21\u578b\u8bf4\u7684，\u54ea\u4e00\u6761\u662f\u5de5\u5177\u56de\u7684\u3002<\/p>\n

        <\/h4>\n

        5.2 \u4e00\u6b21\u5178\u578b\u8f68\u8ff9<\/h4>\n

        \u7528\u6237\u95ee\u5929\u6c14\u4e14\u6a21\u578b\u9009\u62e9\u7528\u5de5\u5177\u65f6，messages \u901a\u5e38\u957f\u8fd9\u6837：<\/p>\n\n\u987a\u5e8f\u7c7b\u578bcontent \u91cc\u5e38\u89c1\u5185\u5bb9\u989d\u5916\u5b57\u6bb5<\/tr>\n\n\n\n\n\n
        1<\/td>\nHumanMessage<\/td>\n\u660e\u5929\u6df1\u5733\u7684\u5929\u6c14\u5982\u4f55？<\/td>\n\u65e0<\/td>\n<\/tr>\n
        2<\/td>\nAIMessage<\/td>\n\u53ef\u80fd\u4e3a\u7a7a，\u6216\u5f88\u77ed\u7684\u8fc7\u6e21\u8bed<\/td>\ntool_calls：\u8981\u8c03 get_weather<\/td>\n<\/tr>\n
        3<\/td>\nToolMessage<\/td>\n\u6674\u5929<\/td>\n\u5bf9\u5e94\u4e0a\u4e00\u6b21 tool call \u7684 id<\/td>\n<\/tr>\n
        4<\/td>\nAIMessage<\/td>\n\u7efc\u5408\u540e\u7684\u81ea\u7136\u8bed\u8a00\u56de\u7b54<\/td>\n\u4e0d\u518d\u5e26 tool_calls<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        \u8bfb\u4ee3\u7801\u65f6\u53ef\u4ee5\u6309\u8fd9\u53e5\u8bdd\u8bb0：<\/p>\n

        \u4eba\u63d0\u95ee \u2192 \u6a21\u578b\u7533\u8bf7\u5de5\u5177 \u2192 \u5de5\u5177\u56de\u89c2\u5bdf \u2192 \u6a21\u578b\u7ed9\u7ed3\u8bba\u3002<\/p>\n

        \u7b2c 2 \u6761 AIMessage \u7684 content \u7ecf\u5e38\u662f\u7a7a\u7684，\u4fe1\u606f\u5728 tool_calls \u91cc\u3002\u6240\u4ee5\u7b2c 02 \u7bc7\u4f1a\u4e13\u95e8\u5224\u65ad latest_message.tool_calls，\u5426\u5219\u4f60\u4f1a\u8bef\u4ee5\u4e3a\u300c\u6a21\u578b\u6ca1\u8bf4\u8bdd\u300d\u3002<\/p>\n

        <\/h4>\n

        5.3 \u548c\u76f4\u63a5 chat \u7684\u5dee\u522b<\/h4>\n

        \u5982\u679c\u628a\u540c\u4e00\u53e5\u300c\u660e\u5929\u6df1\u5733\u7684\u5929\u6c14\u5982\u4f55\u300d\u4e22\u7ed9\u88f8\u7684 ChatTongyi.invoke，\u6a21\u578b\u4f1a\u6839\u636e\u8bad\u7ec3\u6570\u636e\u7f16\u4e00\u6bb5\u9884\u62a5，\u4e0d\u4f1a\u6267\u884c\u4f60\u7684 return "\u6674\u5929"\u3002<\/p>\n

        \u52a0\u4e0a Agent \u4e4b\u540e，\u300c\u6674\u5929\u300d\u8fd9\u4e24\u4e2a\u5b57\u6765\u81ea\u4f60\u7684\u51fd\u6570\u3002\u6a21\u578b\u8d1f\u8d23\u7684\u662f：\u8bc6\u522b\u8fd9\u662f\u5929\u6c14\u95ee\u9898\u3001\u9009\u51fa get_weather\u3001\u628a\u5de5\u5177\u7ed3\u679c\u8bf4\u6210\u4eba\u8bdd\u3002\u8d23\u4efb\u5207\u5f00\u4e86：<\/p>\n

          \n
        • \n

          \u5de5\u5177：\u63d0\u4f9b\u4e8b\u5b9e（\u672c\u8bfe\u662f\u6869\u6570\u636e）<\/p>\n<\/li>\n

        • \n

          \u6a21\u578b：\u51b3\u5b9a\u4f55\u65f6\u8c03\u7528\u3001\u5982\u4f55\u63aa\u8f9e<\/p>\n<\/li>\n<\/ul>\n

          \u8fd9\u5c31\u662f\u667a\u80fd\u4f53\u76f8\u5bf9\u300c\u4f1a\u804a\u5929\u7684\u6a21\u578b\u300d\u771f\u6b63\u591a\u51fa\u6765\u7684\u90a3\u4e00\u5c42\u3002<\/p>\n<\/p>\n

          \u516d\u3001\u672c\u7bc7\u5c0f\u7ed3<\/h3>\n
        • \n

          RAG \u89e3\u51b3\u300c\u770b\u8d44\u6599\u300d，Agent \u89e3\u51b3\u300c\u52a8\u624b\u300d<\/p>\n<\/li>\n

        • \n

          create_agent \u53ea\u8981\u6a21\u578b\u3001\u5de5\u5177\u3001\u7cfb\u7edf\u63d0\u793a\u4e09\u4ef6\u5957<\/p>\n<\/li>\n

        • \n

          @tool(description=…) \u7684\u63cf\u8ff0\u662f\u6a21\u578b\u9009\u5de5\u5177\u7684\u552f\u4e00\u8bf4\u660e\u4e66<\/p>\n<\/li>\n

        • \n

          invoke \u8fd4\u56de\u7684\u662f\u5b8c\u6574 messages，\u8bf7\u6309\u7c7b\u578b\u628a\u8f68\u8ff9\u8bfb\u5b8c，\u4e0d\u8981\u53ea\u770b\u6700\u540e\u4e00\u53e5<\/p>\n<\/li>\n<\/p>\n<\/p>\n<\/p>\n<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

          \u4e00\u3001\u672c\u7bc7\u8981\u89e3\u51b3\u4ec0\u4e48\u95ee\u9898\u4e0a\u4e00\u5957\u4e13\u680f\u628a RAG \u8d70\u901a\u4e86：\u79c1\u6709\u6587\u6863\u5207\u5757\u3001\u5411\u91cf\u5316\u3001\u68c0\u7d22，\u518d\u585e\u8fdb\u63d0\u793a\u8bcd\u8ba9\u5927\u6a21\u578b\u56de\u7b54\u3002\u68c0\u7d22\u89e3\u51b3\u7684\u662f\u300c\u6a21\u578b\u6ca1\u770b\u8fc7\u4f60\u7684\u8d44\u6599\u300d\u3002\u771f\u6b63\u4e0a\u7ebf\u4e4b\u540e，\u8fd8\u4f1a\u649e\u4e0a\u53e6\u4e00\u7c7b\u9700\u6c42：\u7528\u6237\u4e0d\u662f\u53ea\u8981\u4e00\u6bb5\u6587\u5b57，\u800c\u662f\u8981\u67e5\u4e00\u4e0b\u73b0\u5728\u7684\u5929\u6c14\u3001\u8bfb\u4e00\u4e0b\u80a1\u4ef7\u3001\u7b97\u4e00\u4e2a BMI\u3002\u8fd9\u4e9b\u4fe1\u606f\u4e0d\u5728\u77e5\u8bc6\u5e93\u91cc，\u4e5f\u4e0d\u8be5\u5199\u6b7b\u5728 Prompt \u91cc，\u5b83\u4eec\u6765\u81ea\u51fd\u6570\u3001\u63a5\u53e3\u3001\u6570\u636e\u5e93\u3002\u672c\u7bc7\u53ea\u628a\u7b2c\u4e00\u5757\u5730\u57fa\u6253\u5b9e：Agent&<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[997],"topic":[],"class_list":["post-101254","post","type-post","status-publish","format-standard","hentry","category-server","tag-langchain"],"yoast_head":"\n[LangChain Agent] 01 \u5927\u6a21\u578b\u4e3a\u4ec0\u4e48\u9700\u8981 Agent\uff1acreate_agent \u4e0e\u4e00\u6b21\u5929\u6c14\u95ee\u7b54 - 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