{"id":94,"date":"2026-03-08T16:55:36","date_gmt":"2026-03-08T08:55:36","guid":{"rendered":"https:\/\/sunsyblog.cn\/?p=94"},"modified":"2026-03-08T16:55:39","modified_gmt":"2026-03-08T08:55:39","slug":"agent%e5%ad%a6%e4%b9%a0%e7%ac%94%e8%ae%b0%ef%bc%88langchain%ef%bc%89","status":"publish","type":"post","link":"https:\/\/sunsyblog.cn\/index.php\/2026\/03\/08\/agent%e5%ad%a6%e4%b9%a0%e7%ac%94%e8%ae%b0%ef%bc%88langchain%ef%bc%89\/","title":{"rendered":"Agent\u5b66\u4e60\u7b14\u8bb0\uff08Langchain\uff09"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><strong>Agent\u4ecb\u7ecd<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u4ec0\u4e48\u662fAgent<\/strong><\/h3>\n\n\n\n<p>Agent\uff08\u667a\u80fd\u4f53\uff09\u7684\u6838\u5fc3\u5b9a\u4e49\u662f\uff1a<strong>\u80fd\u591f\u81ea\u4e3b\u611f\u77e5\u73af\u5883\u3001\u505a\u51fa\u51b3\u7b56\u3001\u6267\u884c\u884c\u52a8\uff0c\u4ee5\u5b8c\u6210\u7279\u5b9a\u76ee\u6807\u7684\u7a0b\u5e8f \/ \u7cfb\u7edf<\/strong>\u3002<\/p>\n\n\n\n<p>\u5728LangChain\u6846\u67b6\u4e2d\uff0cAgent\uff08\u667a\u80fd\u4f53\uff09\u662f\u4e00\u4e2a\u9ad8\u7ea7\u7ec4\u4ef6\uff0c\u5b83\u901a\u8fc7\u5c06\u5927\u578b\u8bed\u8a00\u6a21\u578b\uff08LLM\uff09\u4e0e\u4e00\u7cfb\u5217\u5916\u90e8\u5de5\u5177\uff08Tools\uff09\u76f8\u7ed3\u5408\uff0c\u6784\u5efa\u4e86\u4e00\u4e2a\u80fd\u591f\u81ea\u4e3b\u63a8\u7406\u5e76\u6267\u884c\u590d\u6742\u4efb\u52a1\u7684\u667a\u80fd\u7cfb\u7edf\u3002\u5176\u6838\u5fc3\u601d\u60f3\u662f\u5229\u7528LLM\u4f5c\u4e3a\u63a8\u7406\u5f15\u64ce\uff08Reasoning Engine\uff09\uff0c\u8ba9\u6a21\u578b\u80fd\u591f\u52a8\u6001\u5730\u51b3\u5b9a\u4e3a\u89e3\u51b3\u7528\u6237\u95ee\u9898\u6240\u9700\u91c7\u53d6\u7684\u884c\u52a8\u5e8f\u5217\uff0c\u5305\u62ec\u9009\u62e9\u4f55\u79cd\u5de5\u5177\u3001\u4ee5\u4f55\u79cd\u987a\u5e8f\u8c03\u7528\uff0c\u5e76\u8fed\u4ee3\u5730\u5904\u7406\u5de5\u5177\u8fd4\u56de\u7684\u7ed3\u679c\uff0c\u76f4\u81f3\u4efb\u52a1\u5b8c\u6210\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"517\" height=\"579\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960122-3e432f49-4a9f-4a04-a537-277b7bbc46ce.jpg\" alt=\"\" class=\"wp-image-95\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960122-3e432f49-4a9f-4a04-a537-277b7bbc46ce.jpg 517w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960122-3e432f49-4a9f-4a04-a537-277b7bbc46ce-268x300.jpg 268w\" sizes=\"auto, (max-width: 517px) 100vw, 517px\" \/><\/figure>\n\n\n\n<p>\u7b80\u5355\u6765\u8bf4\uff0c\u4e00\u4e2aAgent\u4e0d\u518d\u4ec5\u4ec5\u662f\u751f\u6210\u6587\u672c\u7684\u6a21\u578b\uff0c\u800c\u662f\u4e00\u4e2a\u5177\u5907\u201c\u601d\u8003-\u884c\u52a8-\u89c2\u5bdf\u201d\u5faa\u73af\u7684\u81ea\u4e3b\u5de5\u4f5c\u8005\u3002\u5f53\u7528\u6237\u63d0\u51fa\u4e00\u4e2a\u590d\u6742\u9700\u6c42\u65f6\uff0cAgent\u4f1a\u50cf\u4eba\u7c7b\u4e00\u6837\uff0c\u5148\u7406\u89e3\u4efb\u52a1\u3001\u89c4\u5212\u6b65\u9aa4\u3001\u4f7f\u7528\u5408\u9002\u7684\u5de5\u5177\uff08\u5982\u641c\u7d22\u7f51\u7edc\u3001\u67e5\u8be2\u6570\u636e\u5e93\u3001\u6267\u884c\u8ba1\u7b97\uff09\u83b7\u53d6\u4fe1\u606f\uff0c\u6700\u540e\u7efc\u5408\u6240\u6709\u4fe1\u606f\u7ed9\u51fa\u6700\u7ec8\u7b54\u6848\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Agent\u539f\u7406\u4e0e\u6267\u884c\u6d41\u7a0b<\/strong><\/h3>\n\n\n\n<p>Agent\u7684\u6838\u5fc3\u5de5\u4f5c\u539f\u7406\u9075\u5faaReAct\uff08Reasoning + Acting\uff0c\u63a8\u7406+\u884c\u52a8\uff09\u6846\u67b6\uff0c\u5373\u5728\u4e00\u4e2a\u5faa\u73af\u4e2d\u4ea4\u66ff\u8fdb\u884c\u63a8\u7406\u548c\u884c\u52a8\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u4f1a\u6d89\u53ca\u5230\u6a21\u578b\u3001\u5de5\u5177\u3001\u8bb0\u5fc6\u3001\u4e2d\u95f4\u4ef6\u7b49\u6838\u5fc3\u7ec4\u4ef6\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5177\u4f53\u7684ReAct\u5faa\u73af\u793a\u4f8b\uff0c\u6f14\u793aAgent\u5982\u4f55\u89e3\u51b3\u201c\u627e\u51fa\u5f53\u524d\u6700\u6d41\u884c\u7684\u65e0\u7ebf\u8033\u673a\u5e76\u68c0\u67e5\u5e93\u5b58\u201d\u7684\u4efb\u52a1\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"833\" height=\"654\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960122-e76fc57b-db6d-4477-b140-61f1a111f997.jpg\" alt=\"\" class=\"wp-image-97\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960122-e76fc57b-db6d-4477-b140-61f1a111f997.jpg 833w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960122-e76fc57b-db6d-4477-b140-61f1a111f997-300x236.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960122-e76fc57b-db6d-4477-b140-61f1a111f997-768x603.jpg 768w\" sizes=\"auto, (max-width: 833px) 100vw, 833px\" \/><\/figure>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>\u8f93\u5165\u89e3\u6790\u4e0e\u521d\u59cb\u63a8\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<p><strong>\u8f93\u5165<\/strong>\uff1a\u7528\u6237\u67e5\u8be2\uff1a\u201c\u627e\u51fa\u5f53\u524d\u6700\u6d41\u884c\u7684\u65e0\u7ebf\u8033\u673a\u5e76\u68c0\u67e5\u5e93\u5b58\u201d\u3002<\/p>\n\n\n\n<p><strong>\u63a8\u7406<\/strong>\uff1aLLM\u5206\u6790\u4efb\u52a1\u540e\u8ba4\u4e3a\uff1a\u201c\u8981\u627e\u51fa\u2018\u6700\u6d41\u884c\u2019\u7684\u4ea7\u54c1\uff0c\u9700\u8981\u6700\u65b0\u7684\u5e02\u573a\u4fe1\u606f\uff0c\u6211\u5e94\u8be5\u5148\u4f7f\u7528\u641c\u7d22\u5de5\u5177\u3002\u201d<\/p>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u7b2c\u4e00\u6b21\u884c\u52a8\u4e0e\u89c2\u5bdf<\/strong><\/li>\n<\/ol>\n\n\n\n<p><strong>\u884c\u52a8<\/strong>\uff1aAgent\u8c03\u7528search_products\u5de5\u5177\uff0c\u53c2\u6570\u4e3a\u201cwireless headphones\u201d\u3002<\/p>\n\n\n\n<p><strong>\u89c2\u5bdf<\/strong>\uff1a\u5de5\u5177\u8fd4\u56de\u7ed3\u679c\uff1a\u201c\u627e\u52305\u6b3e\u5339\u914d\u4ea7\u54c1\u3002Top\u7ed3\u679c\uff1aWH-1000XM5, ...\u201d<\/p>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u8fed\u4ee3\u63a8\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<p><strong>\u63a8\u7406<\/strong>\uff1aLLM\u6839\u636e\u641c\u7d22\u7ed3\u679c\u5206\u6790\uff1a\u201cWH-1000XM5\u662f\u6392\u540d\u7b2c\u4e00\u7684\u578b\u53f7\u3002\u73b0\u5728\u9700\u8981\u786e\u8ba4\u5176\u5e93\u5b58\u72b6\u6001\u624d\u80fd\u56de\u7b54\u7528\u6237\u95ee\u9898\u3002\u201d<\/p>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u7b2c\u4e8c\u6b21\u884c\u52a8\u4e0e\u89c2\u5bdf<\/strong><\/li>\n<\/ol>\n\n\n\n<p><strong>\u884c\u52a8<\/strong>\uff1aAgent\u8c03\u7528check_inventory\u5de5\u5177\uff0c\u53c2\u6570\u4e3a\u201cWH-1000XM5\u201d\u3002<\/p>\n\n\n\n<p><strong>\u89c2\u5bdf<\/strong>\uff1a\u5de5\u5177\u8fd4\u56de\uff1a\u201c\u4ea7\u54c1WH-1000XM5\uff1a\u5e93\u5b5810\u4ef6\u3002\u201d<\/p>\n\n\n\n<ol start=\"5\" class=\"wp-block-list\">\n<li><strong>\u6700\u7ec8\u8f93\u51fa<\/strong><\/li>\n<\/ol>\n\n\n\n<p><strong>\u63a8\u7406<\/strong>\uff1aLLM\u7efc\u5408\u6240\u6709\u4fe1\u606f\u540e\u8ba4\u4e3a\uff1a\u201c\u5df2\u83b7\u5f97\u6240\u9700\u4fe1\u606f\uff0c\u53ef\u4ee5\u751f\u6210\u6700\u7ec8\u7b54\u6848\u3002\u201d<\/p>\n\n\n\n<p><strong>\u884c\u52a8<\/strong>\uff1a\u6a21\u578b\u751f\u6210\u6700\u7ec8\u7b54\u6848\uff0c\u4e0d\u518d\u8c03\u7528\u5de5\u5177\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>LLM\u3001LLM\u5de5\u5177\u8c03\u7528\u4e0eAgent\u533a\u522b<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">\u5bf9\u6bd4\u89d2\u5ea6<\/td><td class=\"has-text-align-center\" data-align=\"center\">LLM<\/td><td class=\"has-text-align-center\" data-align=\"center\">LLM+\u5de5\u5177\u8c03\u7528<\/td><td class=\"has-text-align-center\" data-align=\"center\">Agent\u5de5\u5177\u8c03\u7528<\/td><\/tr><tr><td>\u672c\u8d28\u5b9a\u4f4d<\/td><td>\u6587\u672c\u751f\u6210\u5668\uff0c\u57fa\u4e8e\u8bad\u7ec3\u6570\u636e\u751f\u6210\u8fde\u8d2f\u6587\u672c<\/td><td>\u589e\u5f3a\u578bLLM\uff0c\u901a\u8fc7\u51fd\u6570\u8c03\u7528\u6269\u5c55\u80fd\u529b\u8fb9\u754c<\/td><td>\u4e00\u4e2a\u5177\u5907\u89c4\u5212\u548c\u6267\u884c\u80fd\u529b\u7684\u667a\u80fd\u7cfb\u7edf\uff0c\u4ee5\u4efb\u52a1\u95ed\u73af\u4e3a\u76ee\u6807<\/td><\/tr><tr><td>\u6838\u5fc3\u529f\u80fd<\/td><td>\u8bed\u8a00\u7406\u89e3\u3001\u6587\u672c\u751f\u6210\u3001\u77e5\u8bc6\u95ee\u7b54<\/td><td>\u57fa\u7840\u5de5\u5177\u8c03\u7528\u3001\u5b9e\u65f6\u6570\u636e\u83b7\u53d6\u3001\u7b80\u5355\u64cd\u4f5c\u6267\u884c<\/td><td>\u591a\u6b65\u89c4\u5212\u3001\u5de5\u5177\u7f16\u6392\u3001\u72b6\u6001\u7ba1\u7406\u3001\u9519\u8bef\u6062\u590d<\/td><\/tr><tr><td>\u5de5\u4f5c\u6a21\u5f0f<\/td><td>\u5355\u6b21\u4ea4\u4e92\uff0c\u9759\u6001\u54cd\u5e94<\/td><td>\u5355\u8f6e\u201c\u8bf7\u6c42-\u8c03\u7528-\u54cd\u5e94\u201d<\/td><td>\u591a\u8f6e\u201c\u611f\u77e5-\u89c4\u5212-\u6267\u884c-\u53cd\u9988\u201d\u5faa\u73af\uff08ReAct\u6846\u67b6\uff09<\/td><\/tr><tr><td>\u7cfb\u7edf\u67b6\u6784<\/td><td>\u5355\u4e00\u6a21\u578b\u63a5\u53e3<\/td><td>\u6a21\u578b+\u5de5\u5177\u7ed1\u5b9a+\u624b\u52a8\u6267\u884c\u5faa\u73af<\/td><td>LLM+\u89c4\u5212+\u8bb0\u5fc6+\u5de5\u5177\u4f7f\u7528+\u9632\u62a4\u63aa\u65bd<\/td><\/tr><tr><td>\u72b6\u6001\u7ba1\u7406<\/td><td>\u9700\u5916\u90e8\u7ef4\u62a4\u72b6\u6001<\/td><td>\u9700\u5916\u90e8\u7ef4\u62a4\u72b6\u6001<\/td><td>\u5185\u7f6e\u8bb0\u5fc6\u7cfb\u7edf\uff0c\u652f\u6301\u77ed\u671f\/\u957f\u671f\u72b6\u6001\u7ba1\u7406<\/td><\/tr><tr><td>\u9519\u8bef\u5904\u7406<\/td><td>\u5931\u8d25\u5373\u7ec8\u6b62\uff0c\u65e0\u81ea\u52a8\u6062\u590d<\/td><td>\u5931\u8d25\u5373\u7ec8\u6b62\uff0c\u65e0\u81ea\u52a8\u6062\u590d<\/td><td>\u652f\u6301\u91cd\u8bd5\u3001\u56de\u6eda\u7b49\u6062\u590d\u673a\u5236<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Agent\u521b\u5efa\u4e0e\u8c03\u7528<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Agent\u521b\u5efa\u65b9\u5f0f<\/strong><\/h3>\n\n\n\n<p>\u6a21\u578b\u662f Agent \u7684\u201c\u5927\u8111\u201d\uff0c\u8d1f\u8d23\u51b3\u7b56\u548c\u63a8\u7406\u3002LangChain \u5728\u6a21\u578b\u914d\u7f6e\u4e0a\u63d0\u4f9b\u4e86\u6781\u5927\u7684\u7075\u6d3b\u6027\uff0c\u652f\u6301<strong>\u9759\u6001\u6a21\u578b<\/strong>\u548c<strong>\u52a8\u6001\u6a21\u578b<\/strong>\u4e24\u79cd\u65b9\u5f0f\uff0c\u4ee5\u9002\u5e94\u4e0d\u540c\u7684\u5e94\u7528\u573a\u666f\u548c\u6210\u672c\u8003\u91cf\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u9759\u6001\u6a21\u578b<\/strong><\/h4>\n\n\n\n<p>\u9759\u6001\u6a21\u578b\u5728 Agent \u521b\u5efa\u65f6\u4e00\u6b21\u6027\u914d\u7f6e\uff0c\u5728\u6574\u4e2a\u6267\u884c\u8fc7\u7a0b\u4e2d\u4fdd\u6301\u4e0d\u53d8\u3002\u8fd9\u662f\u6700\u7b80\u5355\u3001\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p>\u4ee3\u7801\u793a\u4f8b\uff1a\u4f7f\u7528\u521b\u5efa\u597d\u7684\u6a21\u578b\u6784\u5efaAgent\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\"\"\"\n\u521b\u5efa\u4e00\u4e2a\u9759\u6001\u6a21\u578b\u7684\u667a\u80fd\u4f53\n\"\"\"\nimport json\n\nfrom langchain.agents import create_agent\nfrom langchain.chat_models import init_chat_model\nfrom langchain.tools import tool\nfrom langgraph.graph.state import CompiledStateGraph\nfrom env_utils import DEEPSEEK_API_KEY, DEEPSEEK_BASE_URL\n\n\n@tool\ndef get_weather(city: str) -&gt; str:\n    \"\"\"\u83b7\u53d6\u6307\u5b9a\u57ce\u5e02\u7684\u5929\u6c14\u4fe1\u606f\u3002\"\"\"\n    return f\"{city}\u7684\u5929\u6c14\u4e3a\u6674\u6717\uff0c25\u00b0C\u3002\"\n\n# \u901a\u8fc7\u6a21\u578b\u5b9e\u4f8b\u521b\u5efa\uff0c\u53ef\u7cbe\u7ec6\u63a7\u5236\u53c2\u6570\ndeepseek_llm = init_chat_model(\n    model=\"deepseek-chat\",\n    model_provider=\"deepseek\",\n    api_key=DEEPSEEK_API_KEY,\n    base_url=DEEPSEEK_BASE_URL,\n)\n\nagent:CompiledStateGraph = create_agent(deepseek_llm, tools=&#91;get_weather])\n\nprint(type(agent)) # CompiledStateGraph\n\nresp : dict = agent.invoke( {\"messages\": &#91;{\"role\": \"user\", \"content\": \"\u67e5\u8be2\u5317\u4eac\u7684\u5929\u6c14\"}]})\nprint(type(resp)) # dict\nprint(resp)<\/code><\/pre>\n\n\n\n<p>\u6ce8\u610f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65b0\u7248langchain\u4e2d\uff081.0+\uff09\u521b\u5efa\u667a\u80fd\u4f53API\u505a\u4e86\u7edf\u4e00\uff0c\u7531 create_agent\u521b\u5efa agent\uff0ccreate_agent\u51fd\u6570\u8fd4\u56de\u7684\u672c\u8eab\u5c31\u662f\u4e00\u4e2a\u5177\u5907\u6267\u884c\u80fd\u529b\u7684\u5b9e\u4f53\uff0c\u8fd9\u4e2a\u5b9e\u4f53\u5185\u90e8\u57fa\u4e8e LangGraph \u6784\u5efa\u4e86\u4e00\u4e2a\u6267\u884c\u56fe\uff08Graph\uff09\u3002<\/li>\n\n\n\n<li>create_agent\u65b9\u6cd5\u4f20\u9012\u7684\u53c2\u6570\u4e3amodel\uff08Agent\u4f7f\u7528\u7684\u6a21\u578b\uff09\u548ctools\uff08Agent\u4f7f\u7528\u7684\u5de5\u5177\uff09\uff0c\u66f4\u591a\u53c2\u6570\u53c2\u8003\uff1a<a href=\"https:\/\/reference.langchain.com\/python\/langchain\/agents\/\" target=\"_blank\"  rel=\"nofollow\" >https:\/\/reference.langchain.com\/python\/langchain\/agents\/<\/a><\/li>\n\n\n\n<li>agent.invoke\u662f\u8c03\u7528Agent\uff0c\u4f20\u5165\u7684\u53c2\u6570\u4e3a\u56fa\u5b9a\u683c\u5f0f\uff1a\u201d {\"messages\": [{\"role\": \"...\", \"content\": \"...\"}]}\u201d<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u52a8\u6001\u6a21\u578b<\/strong><\/h4>\n\n\n\n<p>\u52a8\u6001\u6a21\u578b\u5141\u8bb8\u5728\u8fd0\u884c\u65f6\u6839\u636e\u5f53\u524d\u5bf9\u8bdd\u7684\u72b6\u6001\u6216\u4e0a\u4e0b\u6587\u667a\u80fd\u5730\u9009\u62e9\u4e0d\u540c\u7684\u6a21\u578b\uff0c\u8fd9\u5bf9\u4e8e\u4f18\u5316\u6210\u672c\u548c\u5904\u7406\u4e0d\u540c\u590d\u6742\u5ea6\u7684\u4efb\u52a1\u975e\u5e38\u6709\u7528\uff0c\u8fd9\u662f\u901a\u8fc7\u4e2d\u95f4\u4ef6\u673a\u5236\u5b9e\u73b0\u7684\uff0c\u5173\u4e8e\u4e2d\u95f4\u4ef6\u4ecb\u7ecd\u53c2\u8003\u201c\u4e2d\u95f4\u4ef6\u201d\u76f8\u5173\u7ae0\u8282\u3002<\/p>\n\n\n\n<p>\u4ee3\u7801\u793a\u4f8b\uff1a\u5f53\u5bf9\u8bdd\u6d88\u606f\u6570\u5927\u4e8e\u7b49\u4e8e3\u6761\u540e\uff0c\u4f7f\u7528\u590d\u6742\u6a21\u578b\uff0c\u5426\u5219\u4f7f\u7528\u7b80\u5355\u6a21\u578b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain.tools import tool\n\nfrom langchain.agents import create_agent\nfrom langchain.agents.middleware import wrap_model_call, ModelRequest, ModelResponse\nfrom langchain.chat_models import init_chat_model\n\nfrom env_utils import DEEPSEEK_API_KEY, DEEPSEEK_BASE_URL, DASHSCOPE_API_KEY, DASHSCOPE_BASE_URL\n\n# \u5b9a\u4e49\u4e24\u4e2a\u6a21\u578b\uff1a\u57fa\u7840\u7248\u548c\u9ad8\u7ea7\u7248\nbasic_model = init_chat_model(\n    model=\"deepseek-chat\",\n    model_provider=\"deepseek\",\n    api_key=DEEPSEEK_API_KEY,\n    base_url=DEEPSEEK_BASE_URL,\n)\n\nadvanced_model = init_chat_model(\n    model=\"qwen-plus\",\n    model_provider=\"openai\",\n    api_key=DASHSCOPE_API_KEY,\n    base_url=DASHSCOPE_BASE_URL,\n)\n\n# 1. \u5b9a\u4e49\u52a8\u6001\u6a21\u578b\u9009\u62e9\u4e2d\u95f4\u4ef6\n@wrap_model_call\ndef dynamic_model_selection(request: ModelRequest, handler) -&gt; ModelResponse:\n    \"\"\"\u6839\u636e\u5bf9\u8bdd\u6d88\u606f\u6570\u52a8\u6001\u9009\u62e9\u6a21\u578b\"\"\"\n    #\u83b7\u53d6\u5f53\u524d\u5bf9\u8bdd\u5185\u5bb9\n    # current_messages = request.state&#91;\"messages\"]\n    # print(f\"\u5f53\u524d\u5bf9\u8bdd\u5185\u5bb9: {current_messages}\")\n\n    # \u83b7\u53d6\u5f53\u524d\u5bf9\u8bdd\u6d88\u606f\u6570\n    message_count = len(request.state&#91;\"messages\"])\n\n    print(f\"\u5f53\u524d\u5bf9\u8bdd\u6d88\u606f\u6570: {message_count}\")\n\n    if message_count &gt;=3:\n        # \u5bf9\u8bdd\u6d88\u606f\u6570\u8d85\u8fc72\u6761\uff0c\u5207\u6362\u81f3\u66f4\u5f3a\u5927\u7684\u6a21\u578b\u5904\u7406\u590d\u6742\u5bf9\u8bdd\n        model = advanced_model\n    else:\n        model = basic_model\n\n    return handler(request.override(model=model))\n\n\n# 2.\u5b9a\u4e49\u5de5\u5177\n@tool\ndef get_current_location() -&gt; str:\n    \"\"\"\u83b7\u53d6\u5f53\u524d\u4f4d\u7f6e\u3002\"\"\"\n    return \"\u5f53\u524d\u4f4d\u7f6e\u4e3a\u5317\u4eac\u5e02\u3002\"\n\n@tool\ndef get_weather(city: str) -&gt; str:\n    \"\"\"\u83b7\u53d6\u6307\u5b9a\u57ce\u5e02\u7684\u5929\u6c14\u4fe1\u606f\u3002\"\"\"\n    return f\"{city}\u7684\u5929\u6c14\u4e3a\u6674\u6717\uff0c25\u00b0C\u3002\"\n\n# 2. \u521b\u5efaAgent\uff0c\u5e76\u4f20\u5165\u52a8\u6001\u6a21\u578b\u9009\u62e9\u4e2d\u95f4\u4ef6\nagent = create_agent(\n    model=basic_model,  # \u6b64\u5904\u8bbe\u7f6e\u4e00\u4e2a\u9ed8\u8ba4\u6a21\u578b\n    tools=&#91;get_current_location,get_weather],  # \u96c6\u6210\u5de5\u5177\n    system_prompt=\"\u4f60\u662f\u4e00\u4e2a\u52a9\u624b\uff0c\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u56de\u7b54\u5404\u79cd\u95ee\u9898\u3002\",\n    middleware=&#91;dynamic_model_selection]  # \u6302\u8f7d\u4e2d\u95f4\u4ef6\n)\n\n# \u6a21\u62df\u4e00\u4e2a\u5bf9\u8bdd\u7684\u8c03\u7528\uff0c\u5305\u542b\u83b7\u53d6\u5f53\u524d\u4f4d\u7f6e\u548c\u5929\u6c14\u4fe1\u606f\nprint(agent.invoke({\"messages\": &#91;{\"role\": \"user\", \"content\": \"\u83b7\u53d6\u5f53\u524d\u4f4d\u7f6e\uff0c\u5e76\u544a\u8bc9\u6211\u5929\u6c14\u60c5\u51b5\"}]}))<\/code><\/pre>\n\n\n\n<p>\u6ce8\u610f\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>@wrap_model_call \u6807\u8bb0\u7684\u65b9\u6cd5\u662f\u6a21\u578b\u9009\u62e9\u4e2d\u95f4\u4ef6\u65b9\u6cd5\uff0ccreate_agent\u65f6\u901a\u8fc7middleware\u53c2\u6570\u6307\u5b9a\u8be5\u65b9\u6cd5\u3002<\/li>\n\n\n\n<li>@wrap_model_call\u65b9\u6cd5\u4e2d\u7684\u4e24\u4e2a\u53c2\u6570\u542b\u4e49\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>request:ModelRequest,\u5c01\u88c5\u4e86\u5f53\u524d\u6a21\u578b\u8c03\u7528\u7684\u6240\u6709\u8bf7\u6c42\u4fe1\u606f\u3002<\/li>\n\n\n\n<li>handler:\u56de\u8c03\u51fd\u6570,\u4ee3\u8868\u540e\u7eed\u5904\u7406\u94fe\uff0c\u8c03\u7528\u5b83\u4f1a\u7ee7\u7eed\u6267\u884c\u6a21\u578b\u8c03\u7528\u6d41\u7a0b,\u901a\u8fc7 handler(request.override(...))\u4f20\u9012\u4fee\u6539\u540e\u7684\u8bf7\u6c42\u3002<\/li>\n<\/ul>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>agent.invoke()\u542f\u52a8\u4e86\u4e00\u4e2a\u590d\u6742\u7684\u3001\u53ef\u80fd\u5305\u542b\u591a\u6b21LLM\u8c03\u7528\u548c\u5de5\u5177\u8c03\u7528\u7684\u63a8\u7406\u5faa\u73af\u3002wrap_model_call\u5728\u8fd9\u4e2a\u5faa\u73af\u7684\u6bcf\u4e2a\u63a8\u7406\u6b65\u9aa4\uff08LLM\u8c03\u7528\uff09\u524d\u90fd\u4f1a\u88ab\u89e6\u53d1\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Agent\u8c03\u7528<\/strong><\/h3>\n\n\n\n<p>invoke\u662f Agent \u6700\u57fa\u672c\u7684\u540c\u6b65\u8c03\u7528\u65b9\u6cd5\uff0c\u5b83\u4f1a\u963b\u585e\u7a0b\u5e8f\u6267\u884c\u76f4\u5230\u8fd4\u56de\u6700\u7ec8\u7ed3\u679c\u3002<\/p>\n\n\n\n<p>\u793a\u610f\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>...\nagent :CompiledStateGraph = create_agent(deepseek_llm, tools=&#91;get_weather])\n\nprint(type(agent)) # CompiledStateGraph\n\nresp = agent.invoke( {\"messages\": &#91;{\"role\": \"user\", \"content\": \"\u67e5\u8be2\u5317\u4eac\u7684\u5929\u6c14\"}]})\n...<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u4ee3\u7801\u4e2d\uff0cinvoke\u4e2d\u4f20\u5165\u7684 {\"messages\": [{\"role\": \"user\", \"content\": \"\u67e5\u8be2\u5317\u4eac\u7684\u5929\u6c14\"}]}\u5bf9\u5e94\u7684\u662f invoke\u65b9\u6cd5\u4e2d\u7684 input\u53c2\u6570\uff0c\u8fd9\u79cd\u5199\u6cd5\u5728\u57fa\u4e8e\u6d88\u606f\uff08Message\uff09\u7684LangChain Agent\u4e2d\u662f\u4e00\u79cd\u6807\u51c6\u4e14\u5e38\u89c1\u7684\u8f93\u5165\u683c\u5f0f\uff0c\u5176\u6838\u5fc3\u8f93\u5165\u5c31\u662f\u4e00\u7cfb\u5217\u6d88\u606f\uff08messages\uff09\uff0c\u6bcf\u6761\u6d88\u606f\u901a\u5e38\u5305\u542b role\uff08\u5982 \"user\", \"assistant\", \"system\", \"tool\"\uff09\u548c \"content\"\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u4e5f\u53ef\u4ee5\u5728message\u5217\u8868\u7684\u5f00\u5934\u52a0\u5165\"system\"\u89d2\u8272\u7684\u6d88\u606f\u6765\u5b9a\u4e49Agent\u7684\u884c\u4e3a,\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain.agents import create_agent\nfrom langchain.tools import tool\nfrom langgraph.graph.state import CompiledStateGraph\n\nfrom init_llm import deepseek_llm\n\n\n@tool\ndef get_weather(city: str) -&gt; str:\n    \"\"\"\u83b7\u53d6\u6307\u5b9a\u57ce\u5e02\u7684\u5929\u6c14\u4fe1\u606f\u3002\"\"\"\n    return f\"{city}\u7684\u5929\u6c14\u4e3a\u6674\u6717\uff0c25\u00b0C\u3002\"\n\n\nagent :CompiledStateGraph = create_agent(deepseek_llm, tools=&#91;get_weather])\n\nresp = agent.invoke( {\n    \"messages\": &#91;\n        {\"role\": \"system\", \"content\": \"\u4f60\u662f\u4e00\u4e2a\u5929\u6c14\u67e5\u8be2\u52a9\u624b\uff0c\u53ea\u56de\u7b54\u5929\u6c14\u76f8\u5173\u7684\u95ee\u9898\uff0c\u5176\u4ed6\u95ee\u9898\u8bf7\u76f4\u63a5\u56de\u7b54\uff1a\u6211\u4e0d\u6e05\u695a\u8fd9\u95ee\u9898\u7b54\u6848\u3002\"},\n        {\"role\": \"user\", \"content\": \"100\u52a0\u4e0a50\u7b49\u4e8e\u591a\u5c11\uff1f\"}\n\n    ]\n})\n\nprint(resp)\nprint(resp&#91;\"messages\"]&#91;-1].content)<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u4ee3\u7801\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{'messages': &#91;SystemMessage(content='\u4f60\u662f\u4e00\u4e2a\u5929\u6c14\u67e5\u8be2\u52a9\u624b\uff0c\u53ea\u56de\u7b54\u5929\u6c14\u76f8\u5173\u7684\u95ee\u9898\uff0c\u5176\u4ed6\u95ee\u9898\u8bf7\u76f4\u63a5\u56de\u7b54\uff1a\u6211\u4e0d\u6e05\u695a\u8fd9\u95ee\u9898\u7b54\u6848\u3002', additional_kwargs={}, response_metadata={}, id='bfd2371c-b547-434a-82c5-57793405c9de'), HumanMessage(content='100\u52a0\u4e0a50\u7b49\u4e8e\u591a\u5c11\uff1f', additional_kwargs={}, response_metadata={}, id='60044614-ce2d-4574-be62-ce9c8e2b089a'), AIMessage(content='\u6211\u4e0d\u6e05\u695a\u8fd9\u95ee\u9898\u7b54\u6848\u3002', additional_kwargs={'refusal': None}, response_metadata={'token_usage': {'completion_tokens': 6, 'prompt_tokens': 328, 'total_tokens': 334, 'completion_tokens_details': None, 'prompt_tokens_details': {'audio_tokens': None, 'cached_tokens': 320}, 'prompt_cache_hit_tokens': 320, 'prompt_cache_miss_tokens': 8}, 'model_provider': 'deepseek', 'model_name': 'deepseek-chat', 'system_fingerprint': 'fp_eaab8d114b_prod0820_fp8_kvcache', 'id': 'f8fa9bba-acb9-44e2-a94c-a3e8d7a6783f', 'finish_reason': 'stop', 'logprobs': None}, id='lc_run--019bc7bb-e2e4-7393-9c4d-66edd3ff3dcf-0', tool_calls=&#91;], invalid_tool_calls=&#91;], usage_metadata={'input_tokens': 328, 'output_tokens': 6, 'total_tokens': 334, 'input_token_details': {'cache_read': 320}, 'output_token_details': {}})]}\n\n\u6211\u4e0d\u6e05\u695a\u8fd9\u95ee\u9898\u7b54\u6848\u3002<\/code><\/pre>\n\n\n\n<p>\u6211\u4eec\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5982\u4e0b\u65b9\u5f0f\u683c\u5f0f\u5316\u8f93\u51fa\u5de5\u5177\u8c03\u7528\u7ed3\u679c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u683c\u5f0f\u5316\u8f93\u51fa\u6240\u6709\u6d88\u606f\nfor msg in resp&#91;\"messages\"]:\n    msg.pretty_print()<\/code><\/pre>\n\n\n\n<p>pretty_print()\u662fLangChain\u6846\u67b6\u4e2d\u6d88\u606f\u5bf9\u8c61\uff08\u4f8b\u5982 HumanMessage, AIMessage, SystemMessage\u7b49\uff09\u81ea\u5e26\u7684\u4e00\u4e2a\u65b9\u6cd5\uff0c\u4e3b\u8981\u7528\u4e8e\u5728\u63a7\u5236\u53f0\u6216 Notebook \u73af\u5883\u4e2d\u7f8e\u5316\u5e76\u6253\u5370\u6d88\u606f\u7684\u5185\u5bb9\u548c\u5143\u6570\u636e\uff0c\u4f7f\u5176\u66f4\u6613\u4e8e\u9605\u8bfb\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0a\u4ee3\u7801\u6267\u884c\u540e\uff0c\u683c\u5f0f\u5316\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"919\" height=\"774\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960122-658e8a0b-d4b6-4a4d-a29a-5b0481d55c94.jpg\" alt=\"\" class=\"wp-image-96\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960122-658e8a0b-d4b6-4a4d-a29a-5b0481d55c94.jpg 919w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960122-658e8a0b-d4b6-4a4d-a29a-5b0481d55c94-300x253.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960122-658e8a0b-d4b6-4a4d-a29a-5b0481d55c94-768x647.jpg 768w\" sizes=\"auto, (max-width: 919px) 100vw, 919px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u63d0\u793a\u8bcd\uff08Prompt\uff09<\/strong><\/h2>\n\n\n\n<p>\u5728LangChain\u4e2d\uff0c\u63d0\u793a\u8bcd\u4e3aAgent\u63d0\u4f9b\u4e86\u4efb\u52a1\u80cc\u666f\u3001\u884c\u4e3a\u51c6\u5219\u548c\u64cd\u4f5c\u6307\u5357\u3002\u901a\u8fc7 system_prompt\u53c2\u6570\u8bbe\u7f6e\uff0c\u5b83\u672c\u8d28\u4e0a\u5b9a\u4e49\u4e86Agent\u7684\u201c\u89d2\u8272\u201d\u548c\u201c\u4f7f\u547d\u201d\u3002<\/p>\n\n\n\n<p>\u63d0\u793a\u8bcd\u8bbe\u7f6e\u6709\u4e24\u79cd\u65b9\u5f0f\uff1a\u57fa\u7840\u8bbe\u7f6e\u548c\u52a8\u6001\u8bbe\u7f6e\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u57fa\u7840\u63d0\u793a\u8bcd\u8bbe\u7f6e<\/strong><\/h4>\n\n\n\n<p>\u63d0\u793a\u8bcd\u57fa\u7840\u8bbe\u7f6e\u662f\u5728\u201ccreate_agent\u201d\u7684\u65f6\u5019\u4f20\u5165\u4e00\u4e2a\u53c2\u6570system_prompt\uff0c\u8fd9\u4e2a\u53c2\u6570\u53ef\u4ee5\u662fstr\u6216\u8005SystemMessage\u7c7b\u578b\u3002<\/p>\n\n\n\n<p><strong>\u6848\u4f8b\uff1a\u4f7f\u7528\u5b57\u7b26\u4e32\u548cSystemMessage\u8bbe\u7f6e\u7cfb\u7edf\u63d0\u793a\u8bcd\u3002<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain.agents import create_agent\nfrom langchain.agents.middleware import dynamic_prompt, ModelRequest\nfrom langchain_core.messages import SystemMessage\nfrom langchain_core.tools import BaseTool, tool\nfrom typing import TypedDict\nimport json\n\nfrom init_llm import deepseek_llm\n\n\n# \u5de5\u5177\uff1a\u5b9e\u73b0\u4e24\u6570\u76f8\u52a0\n@tool\ndef add_numbers(a: int, b: int) -&gt; str:\n    \"\"\"\u8ba1\u7b97\u5e76\u8fd4\u56de\u4e24\u4e2a\u6570\u7684\u548c\u3002\"\"\"\n    return f\"\u548c\u4e3a\uff1a{a + b}\"\n\nif __name__ == '__main__':\n    \"\"\"\u521b\u5efa\u5ba2\u670d\u52a9\u624bAgent\"\"\"\n    # \u521b\u5efa\u5e26\u6709\u52a8\u6001\u63d0\u793a\u8bcd\u4e2d\u95f4\u4ef6\u7684Agent\n    agent = create_agent(\n        model=deepseek_llm,\n        tools=&#91;add_numbers],# \u5de5\u5177\u5217\u8868\n        # system_prompt=\"\u4f60\u662f\u4e00\u4e2a\u6570\u5b66\u52a9\u624b\uff0c\u53ef\u4ee5\u5b9e\u73b0\u4e24\u6570\u76f8\u52a0\u3002\"\n        system_prompt = SystemMessage(content=\"\u4f60\u662f\u4e00\u4e2a\u6570\u5b66\u52a9\u624b\uff0c\u53ef\u4ee5\u5b9e\u73b0\u4e24\u6570\u76f8\u52a0\u3002\")\n    )\n\n    resp = agent.invoke(\n        {\"messages\": &#91;{\"role\": \"user\", \"content\": \"10\u52a0\u4e0a20\u518d\u52a0\u4e0a30\u662f\u591a\u5c11\uff1f\"}]},\n    )\n\n    print(\"resp:\",resp)\n    result = resp&#91;\"messages\"]&#91;-1].content\n    print(result)<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u52a8\u6001\u63d0\u793a\u8bcd\u8bbe\u7f6e<\/strong><\/h4>\n\n\n\n<p>\u5bf9\u4e8e\u9700\u8981\u6839\u636e\u8fd0\u884c\u65f6\u4e0a\u4e0b\u6587\u6216Agent\u72b6\u6001\u8c03\u6574\u63d0\u793a\u8bcd\u7684\u9ad8\u7ea7\u573a\u666f\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e2d\u95f4\u4ef6\uff08Middleware\uff09\u5b9e\u73b0\u52a8\u6001\u63d0\u793a\u8bcd\u3002\u4f8b\u5982\uff0c\u901a\u8fc7 @dynamic_prompt\u88c5\u9970\u5668\u521b\u5efa\u4e2d\u95f4\u4ef6\uff0c\u6839\u636e\u7528\u6237\u89d2\u8272\u751f\u6210\u4e0d\u540c\u7684\u7cfb\u7edf\u63d0\u793a\u3002<\/p>\n\n\n\n<p><strong>\u6848\u4f8b\uff1a\u6784\u5efa\u5ba2\u6237\u95ee\u9898\u5904\u7406\u7684Agent\uff0c\u5bf9\u4e8e\u666e\u901a\u7528\u6237\u548cVIP\u7528\u6237\u91c7\u7528\u4e0d\u540c\u7684\u63d0\u793a\u8bcd\u3002<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain.agents import create_agent\nfrom langchain.agents.middleware import dynamic_prompt, ModelRequest\nfrom langchain_core.tools import BaseTool, tool\nfrom typing import TypedDict\nimport json\n\nfrom init_llm import deepseek_llm\n\n\n# \u5de5\u51771\uff1a\u6a21\u62df\u67e5\u8be2\u8ba2\u5355\u4fe1\u606f\n@tool\ndef query_order_info(order_id: str) -&gt; str:\n    \"\"\"\u6839\u636e\u8ba2\u5355ID\u67e5\u8be2\u8ba2\u5355\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u5305\u62ec\u72b6\u6001\u3001\u5546\u54c1\u5217\u8868\u548c\u521b\u5efa\u65f6\u95f4\u3002\"\"\"\n    # \u6a21\u62df\u6570\u636e\u5e93\u67e5\u8be2\u7ed3\u679c\n    order_database = {\n        \"ORD123456\": {\"status\": \"\u5df2\u53d1\u8d27\", \"items\": &#91;\"\u624b\u673aX1\"], \"create_time\": \"2025-01-15\"},\n        \"ORD654321\": {\"status\": \"\u5f85\u4ed8\u6b3e\", \"items\": &#91;\"\u8033\u673aY1\"], \"create_time\": \"2025-01-18\"}\n    }\n    order_data = order_database.get(order_id)\n    if order_data:\n        return json.dumps(order_data, ensure_ascii=False)\n    else:\n        return f\"\u9519\u8bef\uff1a\u672a\u627e\u5230\u8ba2\u5355 {order_id}\u3002\"\n\n# \u5de5\u51772\uff1a\u6a21\u62df\u68c0\u7d22\u5e38\u89c1\u95ee\u9898\u89e3\u7b54\n@tool\ndef search_faq(keyword: str) -&gt; str:\n    \"\"\"\u6839\u636e\u5173\u952e\u8bcd\u4ece\u77e5\u8bc6\u5e93\u4e2d\u68c0\u7d22\u76f8\u5173\u7684\u653f\u7b56\u6761\u6b3e\u6216\u89e3\u51b3\u65b9\u6848\u3002\"\"\"\n    # \u6a21\u62dfFAQ\u77e5\u8bc6\u5e93\n    faq_knowledge_base = {\n        \"\u9000\u8d27\": \"\u652f\u63017\u5929\u65e0\u7406\u7531\u9000\u8d27\uff0c\u5546\u54c1\u9700\u5b8c\u597d\u4e14\u5305\u88c5\u9f50\u5168\u3002\",\n        \"\u4fdd\u4fee\": \"\u7535\u5b50\u4ea7\u54c1\u4eab\u53d71\u5e74\u514d\u8d39\u4fdd\u4fee\u670d\u52a1\u3002\",\n        \"\u53d1\u8d27\": \"\u4e0b\u5355\u540e48\u5c0f\u65f6\u5185\u53d1\u8d27\uff0c\u504f\u8fdc\u5730\u533a\u53ef\u80fd\u5ef6\u8fdf\u3002\"\n    }\n    # \u7b80\u5355\u5173\u952e\u8bcd\u5339\u914d\n    for topic, answer in faq_knowledge_base.items():\n        if topic in keyword:\n            return answer\n    return f\"\u672a\u627e\u5230\u4e0e'{keyword}'\u76f4\u63a5\u76f8\u5173\u7684\u653f\u7b56\uff0c\u8bf7\u5c1d\u8bd5\u5176\u4ed6\u5173\u952e\u8bcd\u6216\u8054\u7cfb\u4eba\u5de5\u5ba2\u670d\u3002\"\n\n# \u5b9a\u4e49\u8fd0\u884c\u65f6\u4e0a\u4e0b\u6587\u7684\u6570\u636e\u7ed3\u6784\nclass AgentContext(TypedDict):\n    query_type: str  # \u7528\u4e8e\u52a8\u6001\u5224\u65ad\u95ee\u9898\u7c7b\u578b\uff0c\u4f8b\u5982 'normal'\uff08\u666e\u901a\u7528\u6237\uff09 \u6216 'vip'\uff08vip\u7528\u6237\uff09\n\n# \u52a8\u6001\u63d0\u793a\u8bcd\u4e2d\u95f4\u4ef6\uff1a\u6839\u636e\u95ee\u9898\u7c7b\u578b\u8c03\u6574Agent\u7684\u201c\u89d2\u8272\u201d\u548c\u56de\u7b54\u7b56\u7565\n@dynamic_prompt\ndef dynamic_support_prompt(request: ModelRequest) -&gt; str:\n    \"\"\"\n    \u6839\u636e query_type \u751f\u6210\u4e0d\u540c\u7684\u7cfb\u7edf\u63d0\u793a\u8bcd\u3002\n    \"\"\"\n    # print(\"request:\", request)\n    query_type = request.runtime.context.get(\"query_type\", \"normal\")\n    base_instruction = \"\u4f60\u662f\u4e00\u540d\u4e13\u4e1a\u7684\u7535\u5546\u5ba2\u670d\u52a9\u624b\u3002\u8bf7\u6839\u636e\u5de5\u5177\u67e5\u8be2\u7ed3\u679c\uff0c\u51c6\u786e\u3001\u6e05\u6670\u5730\u56de\u7b54\u7528\u6237\u95ee\u9898\u3002\"\n\n    if query_type == \"vip\":\n        # \u9488\u5bf9\u590d\u6742\u6216\u9700\u8981\u5347\u7ea7\u5904\u7406\u7684\u95ee\u9898\n        return f\"\"\"{base_instruction}\n                \u5f53\u524d\u89d2\u8272\uff1a\u9ad8\u7ea7\u652f\u6301\u4e13\u5458\n                \u5de5\u4f5c\u8981\u6c42\uff1a\n                1.\u6df1\u5ea6\u5206\u6790\uff1a\u4ed4\u7ec6\u5206\u6790\u7528\u6237\u63cf\u8ff0\uff0c\u8bc6\u522b\u6f5c\u5728\u7684\u6839\u672c\u95ee\u9898\u3002\n                2.\u7cbe\u51c6\u5206\u7c7b\uff1a\u5c06\u95ee\u9898\u660e\u786e\u5f52\u7c7b\uff08\u5982\u201c\u7269\u6d41\u95ee\u9898\u201d\u3001\u201c\u4ea7\u54c1\u8d28\u91cf\u201d\u3001\u201c\u552e\u540e\u7533\u8bf7\u201d\uff09\u3002\n                3.\u65b9\u6848\u89c4\u5212\uff1a\u82e5\u5de5\u5177\u80fd\u89e3\u51b3\uff0c\u63d0\u4f9b\u5177\u4f53\u6b65\u9aa4\uff1b\u82e5\u9700\u4eba\u5de5\uff0c\u660e\u786e\u544a\u77e5\u540e\u7eed\u6d41\u7a0b\u3002\n                \u8bf7\u4f7f\u7528\u66f4\u4e13\u4e1a\u3001\u4e25\u8c28\u7684\u8bed\u8a00\u3002\n                \"\"\"\n    else:\n        # \u9488\u5bf9\u5e38\u89c4\u5ba2\u670d\u95ee\u9898\n        return f\"\"\"{base_instruction}\n                \u5f53\u524d\u89d2\u8272\uff1a\u4e00\u7ebf\u5ba2\u670d\u52a9\u624b\n                \u5de5\u4f5c\u8981\u6c42\uff1a\n                1.\u5feb\u901f\u54cd\u5e94\uff1a\u4f18\u5148\u4f7f\u7528\u5de5\u5177\u83b7\u53d6\u8ba2\u5355\/\u653f\u7b56\u4fe1\u606f\u3002\n                2.\u76f4\u63a5\u89e3\u7b54\uff1a\u5bf9\u4e8e\u660e\u786e\u95ee\u9898\uff08\u5982\u9000\u8d27\u3001\u7269\u6d41\uff09\uff0c\u76f4\u63a5\u7ed9\u51fa\u57fa\u4e8e\u77e5\u8bc6\u7684\u7b54\u6848\u3002\n                3.\u7b80\u6d01\u53cb\u597d\uff1a\u56de\u590d\u8981\u7b80\u5355\u660e\u4e86\uff0c\u907f\u514d\u590d\u6742\u672f\u8bed\u3002\n                \u4fdd\u6301\u53cb\u597d\u548c\u9ad8\u6548\u7684\u6c9f\u901a\u98ce\u683c\u3002\n                \"\"\"\n\nif __name__ == \"__main__\":\n    \"\"\"\u521b\u5efa\u5ba2\u670d\u52a9\u624bAgent\"\"\"\n    # \u521b\u5efa\u5e26\u6709\u52a8\u6001\u63d0\u793a\u8bcd\u4e2d\u95f4\u4ef6\u7684Agent\n    agent = create_agent(\n        model=deepseek_llm,\n        tools=&#91;query_order_info, search_faq], # \u5de5\u5177\u5217\u8868\n        middleware=&#91;dynamic_support_prompt],  # \u6302\u8f7d\u52a8\u6001\u63d0\u793a\u8bcd\u4e2d\u95f4\u4ef6\n        context_schema=AgentContext  # \u5173\u8054\u4e0a\u4e0b\u6587schema\n    )\n\n    \"\"\"\u6f14\u793a\u52a8\u6001\u63d0\u793a\u8bcd\u6548\u679c\"\"\"\n    # user_query = \"\u6211\u7684\u8ba2\u5355ORD123456\u8fd8\u6ca1\u6536\u5230\uff0c\u5305\u88c5\u7834\u635f\u4e86\u600e\u4e48\u529e\uff1f\"\n    user_query = \"\u6211\u7684\u8ba2\u5355ORD654321\u5df2\u7b7e\u6536\uff0c\u4f46\u662f\u7269\u54c1\u574f\u4e86\u600e\u4e48\u529e\uff1f\"\n    print(f\"\u7528\u6237\u95ee\u9898\uff1a{user_query}\\n\")\n\n    print(\"\u573a\u666f\u4e00\uff1a\u666e\u901a\u5ba2\u670d\u6a21\u5f0f (query_type: 'normal')\")\n    result_normal = agent.invoke(\n        {\"messages\": &#91;{\"role\": \"user\", \"content\": user_query}]},\n        context={\"query_type\": \"normal\"}  # \u6807\u51c6\u6a21\u5f0f\n    )\n\n    # print(\"result_normal:\", result_normal)\n    # \u63d0\u53d6Agent\u7684\u6700\u540e\u4e00\u6761\u56de\u590d\n    final_response_normal = result_normal&#91;\"messages\"]&#91;-1].content\n    print(final_response_normal)\n\n    print(\"\\n\" + \"=\"*50)\n\n    print(\"\u573a\u666f\u4e8c\uff1aVIP\u6a21\u5f0f (query_type: 'vip')\")\n    result_vip = agent.invoke(\n        {\"messages\": &#91;{\"role\": \"user\", \"content\": user_query}]},\n        context={\"query_type\": \"vip\"}\n    )\n    # print(\"result_vip:\", result_vip)\n    # \u63d0\u53d6Agent\u7684\u6700\u540e\u4e00\u6761\u56de\u590d\n    final_response_vip = result_vip&#91;\"messages\"]&#91;-1].content\n    print(final_response_vip)<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u4ee3\u7801\u4e2d\uff0c\u6ce8\u610f\u5982\u4e0b\u51e0\u70b9\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>\u9996\u5148\u5b9a\u4e492\u4e2a\u5de5\u5177\uff0c\u4e24\u4e2a\u5de5\u5177\u6a21\u62df\u5ba2\u670d\u7cfb\u7edf\u4e2d\u64cd\u4f5c<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>query_order_info\uff1a\u6839\u636e\u8ba2\u5355ID\u67e5\u8be2\u8ba2\u5355\u57fa\u672c\u4fe1\u606f\uff08\u5982\u72b6\u6001\u3001\u5546\u54c1\u3001\u521b\u5efa\u65f6\u95f4\uff09\u3002<\/li>\n\n\n\n<li>search_faq:\u4ece\u77e5\u8bc6\u5e93\u4e2d\u68c0\u7d22\u4e0e\u7528\u6237\u95ee\u9898\u76f8\u5173\u7684\u653f\u7b56\u6216\u89e3\u51b3\u65b9\u6848\uff08\u5982\u9000\u8d27\u6d41\u7a0b\u3001\u4fdd\u4fee\u671f\u9650\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u9488\u5bf9\u666e\u901a\u7528\u6237\u548cvip\u7528\u6237\u4f7f\u7528agent\u65f6\u91c7\u7528\u4e0d\u540c\u7684\u63d0\u793a\u8bcd\uff0c\u8fd9\u91cc\u4f7f\u7528\u52a8\u6001\u63d0\u793a\u8bcd\uff0c\u52a8\u6001\u63d0\u793a\u8bcd\u80fd\u6839\u636e\u8fd0\u884c\u65f6\u4e0a\u4e0b\u6587\uff08\u5982\u7528\u6237\u8eab\u4efd\u3001\u95ee\u9898\u7c7b\u578b\uff09\u5b9e\u65f6\u751f\u6210\u6700\u5408\u9002\u7684\u7cfb\u7edf\u63d0\u793a\u8bcd\uff0c\u5b9e\u73b0\u7cbe\u51c6\u5316\u3001\u4e2a\u6027\u5316\u56de\u590d\u3002\u52a8\u6001\u63d0\u793a\u8bcd\u901a\u8fc7\u201ccreate_agent\u201d\u65f6\u4f20\u5165\u6307\u5b9a\u81ea\u5df1\u5b9a\u4e49\u4e2d\u95f4\u4ef6\u51fd\u6570\u3002<\/li>\n\n\n\n<li>create_agent\u4e2dcontext_schema\u53c2\u6570\u4f5c\u7528\u662f\u5b9a\u4e49\u8fd0\u884c\u65f6\u4e0a\u4e0b\u6587\u6709\u54ea\u4e9b\u6570\u636e\uff0c\u662f\u4e00\u4e2aTypedDict\u7c7b\u578b\uff0c\u8fd9\u6837\u53ef\u4ee5\u6307\u5b9a\u6267\u884c\u5355\u6b21\u4efb\u52a1\u65f6\u53ef\u80fd\u9700\u8981\u7684\u52a8\u6001\u6570\u636e\uff08\u5982\u7528\u6237ID\uff0c\u7528\u6237\u7b49\u7ea7\uff09\u7b49\u3002\u5b9a\u4e49\u4e0a\u4e0b\u6587\u53ef\u4f7f\u7528\u54ea\u4e9b\u6570\u636e\u6b65\u9aa4\u5982\u4e0b\uff1a<\/li>\n<\/ol>\n\n\n\n<p>\u9996\u5148\u4f7f\u7528TypedDict\u5b9a\u4e49\u4e0a\u4e0b\u6587\u7684\u6570\u636e\u7ed3\u6784,\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class AgentContext(TypedDict):\n    query_type: str  # \u5b9a\u4e49\u4e00\u4e2a\u540d\u4e3a query_type\uff0c\u7c7b\u578b\u4e3a\u5b57\u7b26\u4e32\u7684\u5b57\u6bb5\n    # user_id: int    # \u53ef\u4ee5\u7ee7\u7eed\u6269\u5c55\u5176\u4ed6\u5b57\u6bb5\uff0c\u4f8b\u5982\u7528\u6237ID<\/code><\/pre>\n\n\n\n<p>\u7136\u540e\uff0c\u5728 create_agent\u65f6\u901a\u8fc7 context_schema\u53c2\u6570\u544a\u77e5Agent\u4f60\u6240\u5b9a\u4e49\u7684\u4e0a\u4e0b\u6587\u7ed3\u6784\uff0c\u6700\u540e\u5728\u8c03\u7528 agent.invoke\u65f6\uff0c\u901a\u8fc7 context\u53c2\u6570\u4f20\u5165\u7b26\u5408\u8be5\u7ed3\u6784\u7684\u5b9e\u9645\u6570\u636e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>result = agent.invoke(\n    {\"messages\": &#91;...]},\n    context={\"query_type\": \"vip\"}  # \u8fd9\u91cc\u4f20\u5165\u7684\u6570\u636e\u5fc5\u987b\u7b26\u5408 AgentContext \u7684\u5b9a\u4e49\n)<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Tools\u5de5\u5177<\/strong><\/h2>\n\n\n\n<p>\u5728LangChain\u4e2d\uff0c\u5de5\u5177\uff08Tools\uff09\u662f\u8d4b\u4e88\u5927\u8bed\u8a00\u6a21\u578b\u4e0e\u5916\u90e8\u4e16\u754c\u4ea4\u4e92\u80fd\u529b\u7684\u5173\u952e\u7ec4\u4ef6\u3002\u5b83\u4eec\u5b9e\u9645\u4e0a\u662f\u5177\u6709\u660e\u786e\u5b9a\u4e49\u8f93\u5165\u548c\u8f93\u51fa\u7684\u53ef\u8c03\u7528\u51fd\u6570\uff0c\u6a21\u578b\u80fd\u6839\u636e\u5bf9\u8bdd\u4e0a\u4e0b\u6587\u51b3\u5b9a\u4f55\u65f6\u8c03\u7528\u5de5\u5177\u4ee5\u53ca\u4f20\u9012\u54ea\u4e9b\u53c2\u6570\u3002\u5de5\u5177\u8ba9\u667a\u80fd\u4f53\u80fd\u591f\u83b7\u53d6\u5b9e\u65f6\u6570\u636e\u3001\u6267\u884c\u4ee3\u7801\u3001\u67e5\u8be2\u5916\u90e8\u6570\u636e\u5e93\u7b49\uff0c\u4ece\u800c\u7a81\u7834\u6a21\u578b\u81ea\u8eab\u77e5\u8bc6\u5c40\u9650\uff0c\u6784\u5efa\u529f\u80fd\u5f3a\u5927\u7684AI\u5e94\u7528\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u5de5\u5177\u521b\u5efa\u65b9\u5f0f<\/strong><\/h3>\n\n\n\n<p>\u521b\u5efa\u5de5\u5177\u6709\u4e09\u79cd\u6838\u5fc3\u65b9\u5f0f:\u4f7f\u7528@tool\u88c5\u9970\u5668\u521b\u5efa\u5de5\u5177\u3001\u4f7f\u7528Pydantic\u6a21\u578b\u5b9a\u4e49\u5de5\u5177\u3001\u4f7f\u7528Json Schema\u5b9a\u4e49\u5de5\u5177\u3002\u4e0b\u9762\u8fdb\u884c\u4ecb\u7ecd\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u4f7f\u7528@tool\u88c5\u9970\u5668\u5b9a\u4e49\u5de5\u5177<\/strong><\/h4>\n\n\n\n<p>\u4f7f\u7528@tool\u88c5\u9970\u5668\u5b9a\u4e49\u5de5\u5177\u662f\u6700\u76f4\u63a5\u7684\u5de5\u5177\u521b\u5efa\u65b9\u6cd5\uff0c\u80fd\u81ea\u52a8\u5c06\u666e\u901a Python \u51fd\u6570\u8f6c\u5316\u4e3a\u667a\u80fd\u4f53\u53ef\u8c03\u7528\u7684\u5de5\u5177\u3002<\/p>\n\n\n\n<p><strong>\u4f7f\u7528@tool\u88c5\u9970\u5668\u521b\u5efa\u5de5\u5177\u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\"\"\"\n@tool \u88c5\u9970\u5668\u521b\u5efa\u5de5\u5177\n\"\"\"\nfrom langchain.agents import create_agent\nfrom langchain_core.tools import tool\nfrom init_llm import deepseek_llm\n\n\n@tool(\"get_employee_info\")\ndef get_employee_info(employee_id: str) -&gt; str:\n    \"\"\"\n    \u6839\u636e\u5458\u5de5ID\u67e5\u8be2\u5458\u5de5\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u5305\u62ec\u59d3\u540d\u3001\u90e8\u95e8\u548c\u804c\u4f4d\u3002\n\n    Args:\n        employee_id (str): \u5458\u5de5\u7684\u552f\u4e00\u6807\u8bc6ID\uff0c\u4f8b\u5982 'E001'\n\n    Returns:\n        str: \u5305\u542b\u5458\u5de5\u8be6\u7ec6\u4fe1\u606f\u7684JSON\u5b57\u7b26\u4e32\n    \"\"\"\n    # \u6a21\u62df\u4e00\u4e2a\u7b80\u5355\u7684\u6570\u636e\u5e93\n    mock_employee_database = {\n        \"E001\": {\"name\": \"\u5f20\u4e09\", \"department\": \"\u6280\u672f\u90e8\", \"position\": \"\u9ad8\u7ea7\u8f6f\u4ef6\u5de5\u7a0b\u5e08\", \"email\": \"zhangsan@company.com\"},\n        \"E002\": {\"name\": \"\u674e\u56db\", \"department\": \"\u5e02\u573a\u90e8\", \"position\": \"\u5e02\u573a\u7ecf\u7406\", \"email\": \"lisi@company.com\"},\n        \"E003\": {\"name\": \"\u738b\u4e94\", \"department\": \"\u4eba\u529b\u8d44\u6e90\u90e8\", \"position\": \"\u62db\u8058\u4e13\u5458\", \"email\": \"wangwu@company.com\"}\n    }\n\n    print(f\"\u6b63\u5728\u67e5\u8be2\u6570\u636e\u5e93\uff0c\u5458\u5de5ID: {employee_id}\")\n\n    # \u67e5\u8be2\u6570\u636e\u5e93\n    employee_record = mock_employee_database.get(employee_id)\n\n    if employee_record:\n        # \u8fd4\u56de\u683c\u5f0f\u5316\u7684\u5458\u5de5\u4fe1\u606f\n        return employee_record\n    else:\n        return f\"\u672a\u627e\u5230ID\u4e3a {employee_id} \u7684\u5458\u5de5\u4fe1\u606f\"\n\n\n# \u521b\u5efaAgent\nagent = create_agent(\n    model=deepseek_llm,\n    tools=&#91;get_employee_info],\n    system_prompt=\"\u4f60\u662f\u4e00\u4e2a\u52a9\u624b\uff0c\u4f60\u53ef\u4ee5\u67e5\u8be2\u5458\u5de5\u7684\u8be6\u7ec6\u4fe1\u606f\u3002\",\n)\n\nresp = agent.invoke({\"messages\": &#91;{\"role\": \"user\", \"content\": \"\u8bf7\u5e2e\u6211\u67e5\u4e00\u4e0b\u5458\u5de5E001\u7684\u8be6\u7ec6\u4fe1\u606f\"}]})\n\nprint(\"resp\", resp)\n\nprint(resp&#91;\"messages\"]&#91;-1].content)<\/code><\/pre>\n\n\n\n<p>\u6ce8\u610f\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>@tool\u88c5\u9970\u5668\u521b\u5efa\u5de5\u5177\u9ed8\u8ba4\u7684\u540d\u79f0\u4e0e\u51fd\u6570\u540d\u76f8\u540c\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u201c@tool(\"get_employee_info\")\u201d\u6307\u5b9a\u65b0\u540d\u79f0\u3002<\/li>\n\n\n\n<li>@tool\u5b9a\u4e49\u5de5\u5177\u65f6\uff0c\u53ef\u4ee5\u5728\u51fd\u6570\u5185\u8fdb\u884c\u6ce8\u91ca\uff0c\u53ef\u4ee5\u4f7f\u7528python\u6ce8\u91ca\uff08\u65e0\u9700\u53c2\u6570\u548c\u8fd4\u56de\u503c\u8bf4\u660e\uff09\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528\u201cGoogle\u98ce\u683c\u201d\u5bf9\u5de5\u5177\u8fdb\u884c\u6ce8\u89e3\uff0c\u5373\u4f7f\u7528 Args:\u3001Returns:\u3001Raises:\u7b49\u5173\u952e\u5b57\uff0c\u8fd9\u79cd\u65b9\u5f0f\u53ef\u8bfb\u6027\u5f3a\u3002Agent\u901a\u8fc7\u5de5\u5177\u7684\u8fd9\u4e9b\u6ce8\u91ca\u6765\u7406\u89e3\u5de5\u5177\u7684\u7528\u9014\u548c\u8c03\u7528\u65f6\u673a\uff0c\u56e0\u6b64\u6e05\u6670\u3001\u51c6\u786e\u7684\u6587\u6863\u5b57\u7b26\u4e32\u662f\u5de5\u5177\u80fd\u88ab\u6b63\u786e\u8c03\u7528\u7684\u524d\u63d0\u3002<\/li>\n\n\n\n<li>\u4e5f\u53ef\u4ee5\u5728@tool\u5b9a\u4e49\u5de5\u5177\u65f6\u4f20\u5165description\u53c2\u6570\uff0c\u4f20\u5165description\u53c2\u6570\u540e\uff0c\u5b83\u4f1a\u5b8c\u5168\u66ff\u4ee3\u51fd\u6570\u7684\u6587\u6863\u5b57\u7b26\u4e32\u6210\u4e3a\u5de5\u5177\u7684\u552f\u4e00\u63cf\u8ff0\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>@tool(\"calculator\", description=\"Performs arithmetic calculations. Use this for any math problems.\")\ndef calc(expression: str) -&gt; str:\n    \"\"\"Evaluate mathematical expressions.\"\"\"\n    return str(eval(expression))<\/code><\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li>\u4e0d\u8981\u4f7f\u7528config\u6216runtime\u4f5c\u4e3a\u53c2\u6570\u540d\uff0c\u8fd9\u4e9b\u662fLangChain\u5185\u90e8\u4fdd\u7559\u7684<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u4f7f\u7528Pydantic\u6a21\u578b\u5b9a\u4e49\u5de5\u5177<\/strong><\/h4>\n\n\n\n<p>Pydantic \u6a21\u578b\u6a21\u5f0f\u7684\u4e3b\u8981\u4f18\u52bf\u5728\u4e8e\u80fd\u591f\u7cbe\u786e\u63a7\u5236\u5de5\u5177\u53c2\u6570\u7684\u683c\u5f0f\u548c\u9a8c\u8bc1\u89c4\u5219\uff0c\u8ba9\u5927\u6a21\u578b\u66f4\u51c6\u786e\u5730\u7406\u89e3\u5982\u4f55\u8c03\u7528\u5de5\u5177\u3002\u8fd9\u79cd\u65b9\u5f0f\u7279\u522b\u9002\u5408\u53c2\u6570\u590d\u6742\u3001\u6709\u7279\u5b9a\u7ea6\u675f\u6761\u4ef6\u7684\u4e1a\u52a1\u573a\u666f\u3002<\/p>\n\n\n\n<p><strong>\u4f7f\u7528Pydantic\u6a21\u578b\u5b9a\u4e49\u5de5\u5177\u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain.agents import create_agent\nfrom pydantic import BaseModel, Field, field_validator\nfrom typing import Literal, Optional\nfrom langchain_core.tools import tool\nimport json\nfrom init_llm import deepseek_llm\n\n\n# 1.\u5b9a\u4e49\u590d\u6742\u7684\u5de5\u5355\u67e5\u8be2\u53c2\u6570\u6a21\u578b\nclass TicketQueryInput(BaseModel):\n    \"\"\"\u5de5\u5355\u67e5\u8be2\u8f93\u5165\u53c2\u6570 - \u652f\u6301\u591a\u79cd\u7b5b\u9009\u6761\u4ef6\"\"\"\n    ticket_id: Optional&#91;str] = Field(\n        default=None,\n        description=\"\u5de5\u5355ID\"\n    )\n    assigner: Optional&#91;str] = Field(\n        default=None,\n        description=\"\u8d1f\u8d23\u4eba\u59d3\u540d\"\n    )\n    status: Optional&#91;Literal&#91;\"open\", \"in_progress\", \"resolved\", \"closed\"]] = Field(\n        default=None,\n        description=\"\u5de5\u5355\u72b6\u6001: open(\u5f85\u5904\u7406), in_progress(\u5904\u7406\u4e2d), resolved(\u5df2\u89e3\u51b3), closed(\u5df2\u5173\u95ed)\"\n    )\n    priority: Optional&#91;Literal&#91;\"low\", \"medium\", \"high\", \"urgent\"]] = Field(\n        default=None,\n        description=\"\u4f18\u5148\u7ea7: low(\u4f4e), medium(\u4e2d), high(\u9ad8), urgent(\u7d27\u6025)\"\n    )\n\n    @field_validator(\"ticket_id\")\n    def convert_ticket_id_to_upper(cls, v: Optional&#91;str]) -&gt; Optional&#91;str]:\n        \"\"\"\u5c06\u5de5\u5355ID\u8f6c\u6362\u4e3a\u5927\u5199\"\"\"\n        return v.upper() if v else None\n\n\n# 2. \u4f7f\u7528@tool\u88c5\u9970\u5668\u5b9a\u4e49\u5de5\u5177\uff0c\u5e76\u901a\u8fc7args_schema\u6307\u5b9a\u53c2\u6570\u6a21\u578b\n@tool(args_schema=TicketQueryInput)\ndef query_tickets(\n        ticket_id: Optional&#91;str] = None,\n        assigner: Optional&#91;str] = None,\n        status: Optional&#91;str] = None,\n        priority: Optional&#91;str] = None,\n) -&gt; str:\n    \"\"\"\n    \u67e5\u8be2\u5de5\u5355\u7cfb\u7edf\uff0c\u652f\u6301\u591a\u6761\u4ef6\u7b5b\u9009\u3002\n\n    \u6b64\u5de5\u5177\u7528\u4e8e\u4ece\u5de5\u5355\u7ba1\u7406\u7cfb\u7edf\u4e2d\u68c0\u7d22\u7b26\u5408\u7279\u5b9a\u6761\u4ef6\u7684\u5de5\u5355\u4fe1\u606f\u3002\n    \u81f3\u5c11\u9700\u8981\u63d0\u4f9b\u4e00\u4e2a\u7b5b\u9009\u6761\u4ef6\uff0c\u5426\u5219\u8fd4\u56de\u6700\u8fd1\u521b\u5efa\u7684\u5de5\u5355\u3002\n    \"\"\"\n    try:\n        # \u6a21\u62df\u4e00\u4e2a\u7b80\u5355\u7684\u5de5\u5355\u6570\u636e\u5e93\n        mock_tickets_db = &#91;\n            {\"ticket_id\": \"TK2025012001\", \"assigner\": \"\u5f20\u4e09\", \"title\": \"\u767b\u5f55\u9875\u9762\u52a0\u8f7d\u7f13\u6162\", \"status\": \"open\", \"priority\": \"low\"},\n            {\"ticket_id\": \"TK2025012002\", \"assigner\": \"\u674e\u56db\", \"title\": \"\u7528\u6237\u5934\u50cf\u4e0a\u4f20\u5931\u8d25\", \"status\": \"open\", \"priority\": \"medium\"},\n            {\"ticket_id\": \"TK2025011901\", \"assigner\": \"\u5f20\u4e09\", \"title\": \"\u652f\u4ed8\u6210\u529f\u901a\u77e5\u672a\u53d1\u9001\", \"status\": \"resolved\", \"priority\": \"high\"},\n            {\"ticket_id\": \"TK2025011902\", \"assigner\": \"\u9a6c\u516d\", \"title\": \"\u8ba2\u5355\u67e5\u8be2\u63a5\u53e3\u8fd4\u56de\u7a7a\u503c\", \"status\": \"closed\", \"priority\": \"high\"},\n        ]\n\n        filtered_tickets = mock_tickets_db\n\n        if ticket_id:\n            filtered_tickets = &#91;t for t in filtered_tickets if t&#91;\"ticket_id\"] == ticket_id]\n\n        if assigner:\n            filtered_tickets = &#91;t for t in filtered_tickets if t&#91;\"assigner\"] == assigner]\n\n        if status:\n            filtered_tickets = &#91;t for t in filtered_tickets if t&#91;\"status\"] == status]\n\n        if priority:\n            filtered_tickets = &#91;t for t in filtered_tickets if t&#91;\"priority\"] == priority]\n\n        if not filtered_tickets:\n            return \"\u672a\u627e\u5230\u7b26\u5408\u6761\u4ef6\u7684\u5de5\u5355\"\n\n        # \u683c\u5f0f\u5316\u8fd4\u56de\u7ed3\u679c\n        result = {\n            \"total_count\": len(filtered_tickets),\n            \"tickets\": filtered_tickets\n        }\n\n        return json.dumps(result, ensure_ascii=False, indent=2)\n\n    except Exception as e:\n        return f\"\u67e5\u8be2\u5de5\u5355\u65f6\u53d1\u751f\u9519\u8bef: {str(e)}\"\n\n\n# 3.\u521b\u5efa\u667a\u80fd\u4f53\nagent = create_agent(\n    model=deepseek_llm,\n    tools=&#91;query_tickets],\n    system_prompt=\"\u4f60\u662f\u4e00\u4e2a\u52a9\u624b\uff0c\u4f60\u53ef\u4ee5\u67e5\u8be2\u5de5\u5355\u7cfb\u7edf\u7684\u5de5\u5355\u4fe1\u606f\u3002\",\n)\n\n# 4. \u6d4b\u8bd5\u667a\u80fd\u4f53\n# 4.1 \u6d4b\u8bd5\u57fa\u672c\u529f\u80fd\n# response1 = agent.invoke({\"messages\": &#91;{\"role\": \"user\", \"content\": \"\u8bf7\u5e2e\u6211\u67e5\u4e00\u4e0bTK2025012001\u5de5\u5355\u7684\u8be6\u7ec6\u4fe1\u606f\"}]})\n# print(\"response1 content\", response1&#91;\"messages\"]&#91;-1].content)\n#\n# response2 = agent.invoke({\"messages\": &#91;{\"role\": \"user\", \"content\": \"\u8bf7\u5e2e\u6211\u67e5\u4e00\u4e0b\u5f20\u4e09\u8d1f\u8d23\u7684\u5de5\u5355\"}]})\n# print(\"response2 content\", response2&#91;\"messages\"]&#91;-1].content)\n#\n# response3 = agent.invoke({\"messages\": &#91;{\"role\": \"user\", \"content\": \"\u8bf7\u5e2e\u6211\u67e5\u4e00\u4e0b\u6240\u6709\u9ad8\u4f18\u5148\u7ea7\u7684\u5de5\u5355\"}]})\n# print(\"response3 content\", response3&#91;\"messages\"]&#91;-1].content)\n#\n# response4 = agent.invoke({\"messages\": &#91;{\"role\": \"user\", \"content\": \"\u8bf7\u5e2e\u6211\u67e5\u4e00\u4e0b\u6240\u6709\u5173\u95ed\u5de5\u5355\"}]})\n# print(\"response4 content\", response4&#91;\"messages\"]&#91;-1].content)\n\n\n# 4.2 \u6d4b\u8bd5 Pydantic \u53c2\u6570\u9a8c\u8bc1\nresponse5 = agent.invoke({\"messages\": &#91;{\"role\": \"user\", \"content\": \"\u8bf7\u5e2e\u6211\u67e5\u4e00\u4e0btk2025012001\u5de5\u5355\u7684\u8be6\u7ec6\u4fe1\u606f\"}]})\nprint(response5)\nprint(\"response5 content\", response5&#91;\"messages\"]&#91;-1].content)<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u4ee3\u7801\u6ce8\u610f\u5982\u4e0b\u95ee\u9898\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>\u8fd9\u79cd\u65b9\u5f0f\u5b9a\u4e49\u5de5\u5177\uff0c\u901a\u8fc7 @tool(args_schema=PydanticModelCls)\u5c06\u8fd9\u4e2a Pydantic \u6a21\u578b\u4e0e\u5de5\u5177\u51fd\u6570\u5173\u8054\u3002<\/li>\n\n\n\n<li>PydanticModelCls \u9700\u8981\u7ee7\u627f\u81ea BaseModel\u7684\u7c7b\uff0c\u4f7f\u7528\u7c7b\u578b\u63d0\u793a\uff08\u5982 str, int\uff09\u548c Field\u51fd\u6570\u6765\u58f0\u660e\u6bcf\u4e2a\u5b57\u6bb5\u7684\u540d\u79f0\u3001\u7c7b\u578b\u3001\u9ed8\u8ba4\u503c\u548c\u63cf\u8ff0\u3002\u6bcf\u4e2a\u5b57\u6bb5\u7684 description\u53c2\u6570\u81f3\u5173\u91cd\u8981\uff0c\u5b83\u76f4\u63a5\u5f71\u54cd\u5927\u6a21\u578b\u7406\u89e3\u53c2\u6570\u542b\u4e49\u7684\u80fd\u529b\u3002<\/li>\n\n\n\n<li>\u53ef\u4ee5\u5229\u7528 Pydantic \u7684\u7c7b\u578b\u7cfb\u7edf\u8fdb\u884c\u53c2\u6570\u9a8c\u8bc1\uff0c\u5f53\u5927\u6a21\u578b\u9700\u8981\u8c03\u7528\u5de5\u5177\u524d\uff0cPydantic \u4f1a\u81ea\u52a8\u9a8c\u8bc1\u53c2\u6570\u7684\u7c7b\u578b\u548c\u6709\u6548\u6027\u3002<\/li>\n\n\n\n<li>\u5728 convert_ticket_id_to_upper\u65b9\u6cd5\u4e2d\u7684 cls\uff0c\u4ee3\u8868\u7684\u662f \u8fd9\u4e2a Pydantic \u6a21\u578b\u7c7b\u672c\u8eab\uff0c\u5728\u8fd9\u91cc\u4e5f\u5c31\u662f TicketQueryInput\u8fd9\u4e2a\u7c7b\u3002@field_validator\u88c5\u9970\u5668\u5c06\u5bf9\u5e94\u65b9\u6cd5\u6807\u8bb0\u4e3a\u7c7b\u65b9\u6cd5\uff0c\u7c7b\u65b9\u6cd5\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u7ea6\u5b9a\u4fd7\u6210\u5730\u547d\u540d\u4e3a cls\uff0c\u5b83\u6307\u5411\u7c7b\u800c\u4e0d\u662f\u7c7b\u7684\u5b9e\u4f8b\u3002\u8fd9\u6837\uff0c\u5728\u9a8c\u8bc1\u903b\u8f91\u4e2d\u5982\u679c\u9700\u8981\u8bbf\u95ee\u7c7b\u7684\u5176\u4ed6\u5c5e\u6027\u6216\u65b9\u6cd5\uff0c\u5c31\u53ef\u4ee5\u901a\u8fc7 cls\u6765\u64cd\u4f5c\u3002<\/li>\n\n\n\n<li>json.dumps()\u662f Python \u6807\u51c6\u5e93 json\u6a21\u5757\u4e2d\u7684\u51fd\u6570\uff0c\u7528\u4e8e\u5c06 Python \u5bf9\u8c61\uff08\u5982\u5b57\u5178\u3001\u5217\u8868\uff09\u5e8f\u5217\u5316\u6210\u4e00\u4e2a JSON \u683c\u5f0f\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n<\/ol>\n\n\n\n<p>(1) ensure_ascii=False: \u8fd9\u4e2a\u53c2\u6570\u9ed8\u8ba4\u503c\u4e3a True\uff0c\u8868\u793a\u6240\u6709\u975e ASCII \u5b57\u7b26\uff08\u5982\u4e2d\u6587\uff09\u4f1a\u88ab\u8f6c\u6362\u6210 \\uXXXX\u5f62\u5f0f\u7684\u8f6c\u4e49\u5e8f\u5217\u3002\u8bbe\u7f6e\u4e3a False\u540e\uff0c\u4e2d\u6587\u3001\u8868\u60c5\u7b26\u53f7\u7b49\u5b57\u7b26\u5c31\u80fd\u5728 JSON \u5b57\u7b26\u4e32\u4e2d\u6b63\u5e38\u663e\u793a\uff0c\u800c\u4e0d\u662f\u4e00\u5806\u4e71\u7801\u3002<\/p>\n\n\n\n<p>(2) indent=2: \u8fd9\u4e2a\u53c2\u6570\u7528\u4e8e\u7f8e\u5316\u8f93\u51fa\uff0c\u4f7f\u751f\u6210\u7684 JSON \u5b57\u7b26\u4e32\u5177\u6709\u53ef\u8bfb\u6027\u3002\u6570\u5b57 2\u8868\u793a\u4f7f\u7528\u4e24\u4e2a\u7a7a\u683c\u4f5c\u4e3a\u7f29\u8fdb\u5c42\u7ea7\uff0c\u8ba9\u7ed3\u6784\u6e05\u6670\u53ef\u89c1\u3002\u5982\u679c\u4e0d\u9700\u8981\u683c\u5f0f\u5316\uff0c\u53ef\u8bbe\u4e3a None\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u4f7f\u7528Json Schema\u5b9a\u4e49\u5de5\u5177<\/strong><\/h4>\n\n\n\n<p>\u5728 LangChain \u4e2d\uff0c\u8fd8\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528 JSON Schema \u5b57\u5178\u6765\u5b9a\u4e49\u5de5\u5177\u7684\u53c2\u6570\u6a21\u5f0f\u3002\u8fd9\u79cd\u65b9\u5f0f\u63d0\u4f9b\u4e86\u6781\u5927\u7684\u7075\u6d3b\u6027\uff0c\u7279\u522b\u9002\u5408\u53c2\u6570\u7ed3\u6784\u9700\u8981\u52a8\u6001\u751f\u6210\u7684\u573a\u666f\u3002<\/p>\n\n\n\n<p><strong>\u4f7f\u7528JsonSchema\u5b9a\u4e49\u5de5\u5177\u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain.agents import create_agent\nfrom langchain_core.tools import tool\nimport json\nfrom init_llm import deepseek_llm\n\n# 1. \u76f4\u63a5\u4f7f\u7528JSON Schema\u5b57\u5178\u5b9a\u4e49\u590d\u6742\u7684\u67e5\u8be2\u53c2\u6570\nbook_query_schema = {\n    \"type\": \"object\",\n    \"properties\": {\n        \"title_keyword\": {\n            \"type\": \"string\",\n            \"description\": \"\u56fe\u4e66\u6807\u9898\u5173\u952e\u8bcd\uff0c\u652f\u6301\u6a21\u7cca\u5339\u914d\"\n        },\n        \"author\": {\n            \"type\": \"string\",\n            \"description\": \"\u56fe\u4e66\u4f5c\u8005\u59d3\u540d\"\n        },\n        \"category\": {\n            \"type\": \"string\",\n            \"enum\": &#91;\"\u6280\u672f\", \"\u6587\u5b66\", \"\u5386\u53f2\", \"\u79d1\u5b66\", \"\u7ecf\u6d4e\u5b66\", \"\u4f20\u8bb0\"],\n            \"description\": \"\u56fe\u4e66\u5206\u7c7b\"\n        }\n    },\n    \"required\": &#91;], # \u81f3\u5c11\u9700\u8981\u63d0\u4f9b\u6807\u9898\u5173\u952e\u8bcd\u3001\u4f5c\u8005\u6216\u5206\u7c7b\u4e2d\u7684\u4e00\u4e2a\u6761\u4ef6\uff0c\u6240\u4ee5\u8fd9\u91cc\u4e3a\u7a7a\n}\n\n# 2. \u4f7f\u7528@tool\u88c5\u9970\u5668\u5b9a\u4e49\u5de5\u5177\uff0c\u5e76\u901a\u8fc7args_schema\u6307\u5b9aJSON Schema\n@tool(args_schema=book_query_schema)\ndef query_books(title_keyword: str = None,\n                author: str = None,\n                category: str = None) -&gt; str:\n    \"\"\"\n    \u6839\u636e\u591a\u79cd\u6761\u4ef6\u67e5\u8be2\u4f01\u4e1a\u56fe\u4e66\u5e93\u4e2d\u7684\u56fe\u4e66\u4fe1\u606f\u3002\n\n    \u6b64\u5de5\u5177\u7528\u4e8e\u4ece\u4f01\u4e1a\u56fe\u4e66\u7ba1\u7406\u7cfb\u7edf\u4e2d\u68c0\u7d22\u56fe\u4e66\u3002\n    \u81f3\u5c11\u9700\u8981\u63d0\u4f9b\u6807\u9898\u5173\u952e\u8bcd\u3001\u4f5c\u8005\u6216\u5206\u7c7b\u4e2d\u7684\u4e00\u4e2a\u6761\u4ef6\u3002\n    \"\"\"\n    try:\n        # \u6a21\u62df\u4e00\u4e2a\u7b80\u5355\u7684\u56fe\u4e66\u6570\u636e\u5e93\n        mock_books_db = &#91;\n            {\"book_id\": \"BK1001\", \"title\": \"\u4eba\u5de5\u667a\u80fd\u5bfc\u8bba\", \"author\": \"\u5f20\u660e\", \"category\": \"\u6280\u672f\"},\n            {\"book_id\": \"BK1002\", \"title\": \"\u673a\u5668\u5b66\u4e60\u5b9e\u6218\", \"author\": \"\u674e\u534e\", \"category\": \"\u6280\u672f\"},\n            {\"book_id\": \"BK1003\", \"title\": \"\u4e2d\u56fd\u8fd1\u4ee3\u53f2\", \"author\": \"\u738b\u4f1f\", \"category\": \"\u5386\u53f2\"},\n            {\"book_id\": \"BK1004\", \"title\": \"\u7ea2\u697c\u68a6\", \"author\": \"\u66f9\u96ea\u82b9\", \"category\": \"\u6587\u5b66\"},\n            {\"book_id\": \"BK1005\", \"title\": \"\u7ecf\u6d4e\u5b66\u539f\u7406\", \"author\": \"\u5218\u5f3a\", \"category\": \"\u7ecf\u6d4e\u5b66\"},\n            {\"book_id\": \"BK1006\", \"title\": \"\u6587\u5b66\u5bfc\u8bba\", \"author\": \"\u5f20\u660e\", \"category\": \"\u6587\u5b66\"},\n            {\"book_id\": \"BK1007\", \"title\": \"Python\u7f16\u7a0b\u57fa\u7840\", \"author\": \"\u738b\u4e3d\", \"category\": \"\u6280\u672f\"}\n        ]\n\n        filtered_books = mock_books_db\n\n        # \u6839\u636e\u6761\u4ef6\u8fc7\u6ee4\u56fe\u4e66\n        if title_keyword:\n            filtered_books = &#91;book for book in filtered_books if title_keyword.lower() in book&#91;\"title\"].lower()]\n        if author:\n            filtered_books = &#91;book for book in filtered_books if book&#91;\"author\"] == author]\n        if category:\n            filtered_books = &#91;book for book in filtered_books if book&#91;\"category\"] == category]\n\n        if not filtered_books:\n            return \"\u672a\u627e\u5230\u7b26\u5408\u6761\u4ef6\u7684\u56fe\u4e66\u3002\"\n\n        # \u683c\u5f0f\u5316\u8fd4\u56de\u7ed3\u679c\n        result = {\n            \"total_count\": len(filtered_books),\n            \"books\": filtered_books\n        }\n\n        return json.dumps(result, ensure_ascii=False, indent=2)\n\n    except Exception as e:\n        return f\"\u67e5\u8be2\u56fe\u4e66\u65f6\u53d1\u751f\u9519\u8bef: {str(e)}\"\n\n\n# 3. \u521b\u5efa\u667a\u80fd\u4f53\nagent = create_agent(\n    model=deepseek_llm,\n    tools=&#91;query_books],\n    system_prompt=\"\u4f60\u662f\u4e00\u4e2a\u4f01\u4e1a\u56fe\u4e66\u7ba1\u7406\u5458\uff0c\u53ef\u4ee5\u5e2e\u52a9\u5458\u5de5\u67e5\u8be2\u56fe\u4e66\u4fe1\u606f\u3002\",\n)\n\n# 4. \u6d4b\u8bd5\u667a\u80fd\u4f53\n# \u6d4b\u8bd51\uff1a\u6309\u56fe\u4e66\u79cd\u7c7b\u7cbe\u786e\u67e5\u8be2\nresponse1 = agent.invoke({\"messages\": &#91;{\"role\": \"user\", \"content\": \"\u8bf7\u5e2e\u6211\u67e5\u4e00\u4e0b\u5386\u53f2\u7c7b\u56fe\u4e66\"}]})\nprint(\"=== \u6d4b\u8bd51\uff1a\u6309\u56fe\u4e66\u79cd\u7c7b\u7cbe\u786e\u67e5\u8be2 ===\")\nprint(response1&#91;\"messages\"]&#91;-1].content)\n\n# \u6d4b\u8bd52\uff1a\u591a\u6761\u4ef6\u7ec4\u5408\u67e5\u8be2\nresponse2 = agent.invoke({\"messages\": &#91;{\"role\": \"user\", \"content\": \"\u6211\u60f3\u627e\u5f20\u660e\u5199\u7684\u6280\u672f\u7c7b\u56fe\u4e66\"}]})\nprint(response2)\nprint(\"\\n=== \u6d4b\u8bd52\uff1a\u591a\u6761\u4ef6\u7ec4\u5408\u67e5\u8be2 ===\")\nprint(response2&#91;\"messages\"]&#91;-1].content)\n\n# \u6d4b\u8bd53\uff1a\u5173\u952e\u8bcd\u6a21\u7cca\u67e5\u8be2\nresponse3 = agent.invoke({\"messages\": &#91;{\"role\": \"user\", \"content\": \"\u641c\u7d22\u5305\u542b'Python'\u5173\u952e\u8bcd\u7684\u56fe\u4e66\"}]})\nprint(\"\\n=== \u6d4b\u8bd53\uff1a\u5173\u952e\u8bcd\u6a21\u7cca\u67e5\u8be2 ===\")\nprint(response3&#91;\"messages\"]&#91;-1].content)<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u4ee3\u7801\u6ce8\u610f\u5982\u4e0b\u95ee\u9898\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Json Schema\u5b9a\u4e49\u5de5\u5177\u65b9\u5f0f\u901a\u8fc7 @tool(args_schema=json_schema_dict)\u5c06\u4e00\u4e2a\u7b26\u5408 JSON Schema \u6807\u51c6\u7684\u5b57\u5178\u4e0e\u5de5\u5177\u51fd\u6570\u5173\u8054\u3002<\/li>\n\n\n\n<li>JSON Schema \u662f\u884c\u4e1a\u6807\u51c6\uff0c\u7528\u4e8e\u63cf\u8ff0 JSON \u6570\u636e\u7ed3\u6784\u548c\u9a8c\u8bc1\u89c4\u5219\u3002<\/li>\n<\/ol>\n\n\n\n<p>(1) type\uff1a\u5b9a\u4e49\u5f53\u524d\u6570\u636e\u8282\u70b9\u5fc5\u987b\u662f\u4ec0\u4e48\u6570\u636e\u7c7b\u578b\u3002\u5e38\u89c1\u7c7b\u578b\u6709 string, number, integer, boolean, object, array, null\u3002object\u5373\u662fjson\u5bf9\u8c61\u3002<\/p>\n\n\n\n<p>(2) properties\uff1a\u7528\u4e8e\u5b9a\u4e49JSON \u5bf9\u8c61\uff08Object\uff09\u4e2d\u53ef\u4ee5\u5305\u542b\u54ea\u4e9b\u5c5e\u6027\uff08\u952e\uff09\uff0c\u4ee5\u53ca\u6bcf\u4e2a\u5c5e\u6027\u5bf9\u5e94\u7684\u503c\u7c7b\u578b\u548c\u8bf4\u660e\u3002<\/p>\n\n\n\n<p>(3) required\uff1a\u5f53 type\u4e3a \"object\"\u65f6\u4f7f\u7528\uff0c\u662f\u4e00\u4e2a\u6570\u7ec4\uff0c\u5217\u51fa\u4e86\u5bf9\u8c61\u4e2d\u5fc5\u987b\u5b58\u5728\u7684\u5c5e\u6027\u540d\u3002\u672c\u6848\u4f8b\u4e2d\u6307\u5b9a\u4e3a\u7a7a\u8868\u793ajson\u5bf9\u8c61\u4e2d\u7684\u5c5e\u6027\u90fd\u662f\u975e\u5fc5\u987b\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u5de5\u5177\u521b\u5efa\u603b\u7ed3<\/strong><\/h4>\n\n\n\n<p>LangChain\u63d0\u4f9b\u7684\u4e09\u79cd\u6838\u5fc3\u7684\u5de5\u5177\u521b\u5efa\u65b9\u5f0f\u5bf9\u6bd4\u7279\u70b9\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>@tool\u88c5\u9970\u5668<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u5728\u51fd\u6570\u4e0a\u65b9\u6dfb\u52a0\u4e00\u4e2a\u88c5\u9970\u5668\uff0c\u5c31\u80fd\u5c06\u5176\u53d8\u6210\u667a\u80fd\u4f53\u53ef\u4ee5\u8c03\u7528\u7684\u5de5\u5177\u3002\u4f18\u52bf\u662f\u4ee3\u7801\u91cf\u6781\u5c11\uff0c\u975e\u5e38\u9002\u5408\u5feb\u901f\u9a8c\u8bc1\u60f3\u6cd5\u6216\u521b\u5efa\u53c2\u6570\u7b80\u5355\u7684\u5de5\u5177\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Pydantic \u6a21\u578b<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u5f53\u5de5\u5177\u7684\u53c2\u6570\u53d8\u5f97\u590d\u6742\uff0c\u9700\u8981\u679a\u4e3e\u503c\u3001\u8303\u56f4\u9650\u5236\u6216\u66f4\u590d\u6742\u7684\u4e1a\u52a1\u903b\u8f91\u9a8c\u8bc1\u65f6\uff0cPydantic \u6a21\u578b\u662f\u7406\u60f3\u9009\u62e9\u3002\u63d0\u4f9b\u5f3a\u5927\u7684\u7c7b\u578b\u68c0\u67e5\u548c\u6570\u636e\u9a8c\u8bc1\u3002\u53ef\u4ee5\u4f7f\u7528 Literal\u7c7b\u578b\u9650\u5b9a\u53c2\u6570\u4e3a\u56fa\u5b9a\u9009\u9879\uff0c\u6216\u7528 Field\u8bbe\u7f6e\u9ed8\u8ba4\u503c\u3001\u63cf\u8ff0\uff0c\u751a\u81f3\u7528 @field_validator\u5b9e\u73b0\u81ea\u5b9a\u4e49\u6821\u9a8c\u89c4\u5219\uff08\u5982\u5c06\u5de5\u5355ID\u8f6c\u4e3a\u5927\u5199\uff09\u3002\u975e\u5e38\u9002\u5408\u53c2\u6570\u7ed3\u6784\u7a33\u5b9a\u7684\u4f01\u4e1a\u5185\u90e8\u5de5\u5177\uff0c\u5982\u5de5\u5355\u67e5\u8be2\u3001\u5ba2\u6237\u4fe1\u606f\u7ba1\u7406\u7b49\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>JSON Schema<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u5de5\u5177\u53c2\u6570\u6a21\u5f0f\u53ef\u4ee5\u57fa\u4e8e\u6570\u636e\u5e93\u914d\u7f6e\u6216\u7528\u6237\u8f93\u5165\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u751f\u6210\uff0c\u53ef\u4ee5\u9009\u62e9\u8fd9\u79cd\u65b9\u5f0f\uff0c\u9002\u7528\u4e8e\u9700\u8981\u9ad8\u5ea6\u52a8\u6001\u884c\u4e3a\u7684\u5de5\u5177\uff0c\u6216\u4e0e\u5df2\u6709 JSON Schema \u5b9a\u4e49\u7684\u5916\u90e8\u7cfb\u7edf\u6253\u901a\u7684\u573a\u666f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u8c03\u7528\u5de5\u5177\u9519\u8bef\u5904\u7406<\/strong><\/h3>\n\n\n\n<p>\u8c03\u7528\u5de5\u5177\u9519\u8bef\u5904\u7406\u662f\u6307\u5f53\u667a\u80fd\u4f53\u8c03\u7528\u5916\u90e8\u5de5\u5177\uff08\u5982API\u3001\u6570\u636e\u5e93\u67e5\u8be2\u7b49\uff09\u9047\u5230\u5f02\u5e38\u65f6\uff0c\u7cfb\u7edf\u80fd\u591f\u4f18\u96c5\u5730\u6355\u83b7\u3001\u5904\u7406\u8fd9\u4e9b\u9519\u8bef\uff0c\u5e76\u5411\u5927\u6a21\u578b\u8fd4\u56de\u6709\u610f\u4e49\u7684\u9519\u8bef\u4fe1\u606f\uff0c\u800c\u4e0d\u662f\u8ba9\u672a\u5904\u7406\u7684\u5f02\u5e38\u76f4\u63a5\u4e2d\u65ad\u6574\u4e2a\u6d41\u7a0b\u3002<\/p>\n\n\n\n<p>\u5f53Agent\u8c03\u7528\u5de5\u5177\u5f02\u5e38\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528@wrap_tool_call\u4e2d\u95f4\u4ef6\u6765\u7075\u6d3b\u5904\u7406\u8c03\u7528\u5de5\u5177\u53d1\u751f\u7684\u5f02\u5e38\u9519\u8bef\uff0c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain.agents import create_agent\nfrom langchain.agents.middleware import wrap_tool_call\nfrom langchain.messages import ToolMessage\n\n\n@wrap_tool_call\ndef handle_tool_errors(request, handler):\n    \"\"\"\u4f7f\u7528\u81ea\u5b9a\u4e49\u6d88\u606f\u5904\u7406\u5de5\u5177\u6267\u884c\u9519\u8bef\"\"\"\n    try:\n        return handler(request)\n    except Exception as e:\n        # \u5411\u6a21\u578b\u8fd4\u56de\u81ea\u5b9a\u4e49\u9519\u8bef\u6d88\u606f\n        return ToolMessage(\n            content=f\"\u8c03\u7528\u5de5\u5177\u9519\u8bef:\u8bf7\u68c0\u67e5\u8f93\u5165\u53c2\u6570\u5e76\u91cd\u8bd5. ({str(e)})\",\n            tool_call_id=request.tool_call&#91;\"id\"]\n        )\n\nagent = create_agent(\n    model=\"gpt-4o\",\n    tools=&#91;search, get_weather],\n    middleware=&#91;handle_tool_errors]\n)<\/code><\/pre>\n\n\n\n<p>\u5f53\u5de5\u5177\u8c03\u7528\u5931\u8d25\u65f6\uff0cAgent\u5c06\u8fd4\u56de\u5e26\u6709\u81ea\u5b9a\u4e49\u9519\u8bef\u6d88\u606f\u7684ToolMessage\uff0cToolMessage\u5fc5\u987b\u4f20\u9012content\uff08\u5de5\u5177\u6267\u884c\u7684\u7ed3\u679c\u6216\u9519\u8bef\u4fe1\u606f\uff09\u548ctool_call_id\uff08\u6240\u8c03\u5de5\u5177\u552f\u4e00\u6807\u8bc6\u7b26\uff0c\u5c06\u6b64\u6d88\u606f\u4e0e\u5f15\u53d1\u6b64\u6b21\u8c03\u7528\u7684\u7279\u5b9a AIMessage\u4e2d\u7684\u5de5\u5177\u8c03\u7528\u5173\u8054\u8d77\u6765\uff09\u4e24\u4e2a\u6838\u5fc3\u53c2\u6570\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;\n    ...\n    ToolMessage(\n        content=\"\u8c03\u7528\u5de5\u5177\u9519\u8bef:\u8bf7\u68c0\u67e5\u8f93\u5165\u53c2\u6570\u5e76\u91cd\u8bd5\u3002({str(e)})\",\n        tool_call_id=\"...\"\n    ),\n    ...\n]<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u4e2d\u95f4\u4ef6\u7684\u6267\u884c\u65f6\u673a\u5982\u4e0b\uff1a\u7528\u6237\u63d0\u95ee \u2192 LLM\u5206\u6790\u5e76\u51b3\u5b9a\u8c03\u7528\u5de5\u5177 \u2192 LangChain\u51c6\u5907\u5de5\u5177\u8c03\u7528\u53c2\u6570 \u2192 \u9519\u8bef\u5904\u7406\u4e2d\u95f4\u4ef6\u4ecb\u5165 \u2192 \u5b9e\u9645\u5de5\u5177\u6267\u884c \u2192 \u7ed3\u679c\/\u9519\u8bef\u8fd4\u56de\u3002\u6240\u4ee5@wrap_tool_call\u4e2d\u95f4\u63a5\u6267\u884c\u6d41\u7a0b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>\u5f53Agent\u9700\u8981\u8c03\u7528\u5de5\u5177\u65f6\uff0c\u6267\u884c\u6d41\u7a0b\u4f1a\u5148\u7ecf\u8fc7\u6240\u6709\u6ce8\u518c\u7684 wrap_tool_call\u4e2d\u95f4\u4ef6\u3002<\/li>\n\n\n\n<li>\u6bcf\u4e2a\u4e2d\u95f4\u4ef6\u90fd\u53ef\u4ee5\u9009\u62e9\u76f4\u63a5\u5904\u7406\u8bf7\u6c42\uff0c\u6216\u8005\u5c06\u8bf7\u6c42\u901a\u8fc7\u201chandler(request)\u201d\u4f20\u9012\u7ed9\u4e0b\u4e00\u4e2a\u5904\u7406\u7a0b\u5e8f,\u4e0b\u4e00\u4e2a\u5904\u7406\u7a0b\u5e8f\u5c31\u662f\u6267\u884c\u5de5\u5177\u3002<\/li>\n\n\n\n<li>\u6700\u7ec8\u5230\u8fbe\u5b9e\u9645\u7684\u5de5\u5177\u6267\u884c\u5c42\uff0c\u7136\u540e\u7ed3\u679c\u518d\u9006\u5e8f\u8fd4\u56de\u3002<\/li>\n<\/ol>\n\n\n\n<p><strong>\u6848\u4f8b\u4e00\uff1a\u6a21\u62df\u8c03\u7528\u80a1\u7968\u5de5\u5177\u53d1\u751f\u8bbf\u95ee\u9519\u8bef\uff0c\u4f7f\u7528@wrap_tool_call\u8fdb\u884c\u9519\u8bef\u5904\u7406\u3002<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain.agents import create_agent\nfrom langchain.agents.middleware import wrap_tool_call\nfrom langchain.messages import ToolMessage\nfrom langchain_core.tools import tool\nimport requests\n\nfrom init_llm import deepseek_llm\n\n\n# \u5b9a\u4e49\u53ef\u80fd\u5931\u8d25\u7684\u5de5\u5177\uff1a\u80a1\u7968\u67e5\u8be2\u5de5\u5177\n@tool\ndef get_stock_price(symbol: str) -&gt; str:\n    \"\"\"\n    \u83b7\u53d6\u6307\u5b9a\u80a1\u7968\u4ee3\u7801\u7684\u5f53\u524d\u4ef7\u683c\n    Arg:\n        symbol: \u80a1\u7968\u4ee3\u7801\uff08\u4f8b\u5982\uff1aTCEHY\uff09\n    Returns:\n        \u80a1\u7968\u5f53\u524d\u4ef7\u683c\uff08\u4f8b\u5982\uff1a\"\u80a1\u7968 TCEHY \u5f53\u524d\u4ef7\u683c\u4e3a 123.45\"\uff09\n    \"\"\"\n    print(f\"=====\u8c03\u7528\u80a1\u7968\u67e5\u8be2\u5de5\u5177: {symbol}\")\n    try:\n        # \u6a21\u62df\u53ef\u80fd\u5931\u8d25\u7684API\u8c03\u7528\n        response = requests.get(f\"https:\/\/api.example.com\/stocks\/{symbol}\", timeout=1)\n        return f\"\u80a1\u7968 {symbol} \u5f53\u524d\u4ef7\u683c\u4e3a {response&#91;'price']}\"\n    except requests.exceptions.RequestException as e:\n        print(f\"=====\u67e5\u8be2\u80a1\u7968\u6570\u636e\u5931\u8d25: {str(e)}\")\n        raise Exception(f\"\u67e5\u8be2\u80a1\u7968\u6570\u636e\u5931\u8d25: {str(e)}\")\n\n# \u81ea\u5b9a\u4e49\u9519\u8bef\u5904\u7406\u4e2d\u95f4\u4ef6\n@wrap_tool_call\ndef handle_tool_errors(request, handler):\n    \"\"\"\u5904\u7406\u5de5\u5177\u6267\u884c\u9519\u8bef\u7684\u81ea\u5b9a\u4e49\u4e2d\u95f4\u4ef6\"\"\"\n    print(f\"=====\u8c03\u7528\u5904\u7406\u9519\u8befhandle: {request}\")\n    try:\n        return handler(request)\n    except Exception as e:\n        print(f\"=====\u5de5\u5177\u6267\u884c\u9519\u8bef: {str(e)}\")\n        # \u8fd4\u56de\u7ed3\u6784\u5316\u7684\u9519\u8bef\u4fe1\u606f\u7ed9\u6a21\u578b\n        return ToolMessage(\n            content=f\"\u5de5\u5177\u6267\u884c\u9519\u8bef\uff1a{str(e)}\u3002\u8bf7\u68c0\u67e5\u80a1\u7968\u4ee3\u7801\u662f\u5426\u6b63\u786e\u6216\u7a0d\u540e\u91cd\u8bd5\u3002\", # \u9519\u8bef\u4fe1\u606f\n            tool_call_id=request.tool_call&#91;\"id\"] # \u4ece\u8bf7\u6c42\u4e2d\u83b7\u53d6\u5de5\u5177\u8c03\u7528ID\n        )\n\n# \u521b\u5efa\u667a\u80fd\u4f53\u5e76\u6ce8\u518c\u9519\u8bef\u5904\u7406\u4e2d\u95f4\u4ef6\nagent = create_agent(\n    model=deepseek_llm,\n    tools=&#91;get_stock_price],\n    middleware=&#91;handle_tool_errors],\n    system_prompt=\"\u4f60\u662f\u4e00\u4e2a\u80a1\u7968\u67e5\u8be2\u52a9\u624b\uff0c\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u67e5\u8be2\u80a1\u7968\u4ef7\u683c\u4fe1\u606f\u3002\"\n)\n\n# \u8c03\u7528\u667a\u80fd\u4f53\nresponse = agent.invoke({\"messages\": &#91;{\"role\": \"user\", \"content\": \"\u67e5\u8be2\u80a1\u7968 TCEHY \u7684\u5f53\u524d\u4ef7\u683c\"}]})\nprint(f\"=====\u8c03\u7528\u667a\u80fd\u4f53\u54cd\u5e94: {response}\")\nprint(response&#91;\"messages\"]&#91;-1].content)<\/code><\/pre>\n\n\n\n<p>\u4ee3\u7801\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1597\" height=\"518\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-afd8b30c-a9f1-48d4-ae13-8a4b2ce767fd.jpg\" alt=\"\" class=\"wp-image-98\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-afd8b30c-a9f1-48d4-ae13-8a4b2ce767fd.jpg 1597w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-afd8b30c-a9f1-48d4-ae13-8a4b2ce767fd-300x97.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-afd8b30c-a9f1-48d4-ae13-8a4b2ce767fd-1024x332.jpg 1024w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-afd8b30c-a9f1-48d4-ae13-8a4b2ce767fd-768x249.jpg 768w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-afd8b30c-a9f1-48d4-ae13-8a4b2ce767fd-1536x498.jpg 1536w\" sizes=\"auto, (max-width: 1597px) 100vw, 1597px\" \/><\/figure>\n\n\n\n<p><strong>\u6848\u4f8b\u4e8c\uff1a\u901a\u8fc7\u5927\u6a21\u578b\u67e5\u8be2\/\u66f4\u65b0\u5de5\u5355\u64cd\u4f5c\uff0c\u4f7f\u7528@wrap_tool_call\u5904\u7406\u9519\u8bef\u3002<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain.agents import create_agent\nfrom langchain.agents.middleware import wrap_tool_call\nfrom langchain.messages import ToolMessage\nfrom langchain_core.tools import tool, ToolException\nimport json\nimport random\n\nfrom init_llm import deepseek_llm\n\n# \u6a21\u62df\u5de5\u5355\u6570\u636e\u5e93\nTICKET_DATABASE = {\n    \"T001\": {\"title\": \"\u767b\u5f55\u95ee\u9898\", \"status\": \"\u5904\u7406\u4e2d\", \"assignee\": \"\u5f20\u4e09\"},\n    \"T002\": {\"title\": \"\u652f\u4ed8\u5931\u8d25\", \"status\": \"\u5df2\u89e3\u51b3\", \"assignee\": \"\u674e\u56db\"},\n    \"T003\": {\"title\": \"\u9875\u9762\u52a0\u8f7d\u6162\", \"status\": \"\u5f85\u5904\u7406\", \"assignee\": \"\u738b\u4e94\"}\n}\n\n\n@tool\ndef query_ticket(ticket_id: str) -&gt; str:\n    \"\"\"\n    \u6839\u636e\u5de5\u5355ID\u67e5\u8be2\u5de5\u5355\u8be6\u60c5\n    Args:\n        ticket_id (str): \u5de5\u5355ID\n    Returns:\n        str: \u5de5\u5355\u8be6\u60c5\u7684JSON\u5b57\u7b26\u4e32\n    \"\"\"\n    # \u6a21\u62df\u7f51\u7edc\u4e0d\u7a33\u5b9a\uff1a50%\u6982\u7387\u5931\u8d25\n    if random.random() &lt; 0.5:\n        raise ConnectionError(\"\u6570\u636e\u5e93\u8fde\u63a5\u8d85\u65f6\uff0c\u8bf7\u7a0d\u540e\u91cd\u8bd5\")\n\n    if ticket_id not in TICKET_DATABASE:\n        raise ToolException(f\"\u5de5\u5355ID {ticket_id} \u4e0d\u5b58\u5728\")\n\n    ticket = TICKET_DATABASE&#91;ticket_id]\n    return json.dumps(ticket, ensure_ascii=False, indent=2)\n\n\n@tool\ndef update_ticket_status(ticket_id: str, new_status: str) -&gt; str:\n    \"\"\"\n    \u66f4\u65b0\u5de5\u5355\u72b6\u6001\n    Args:\n        ticket_id (str): \u5de5\u5355ID\n        new_status (str): \u5de5\u5355\u65b0\u72b6\u6001\n    Returns:\n        str: \u66f4\u65b0\u6210\u529f\u7684\u6d88\u606f\n    \"\"\"\n    valid_statuses = &#91;\"\u5f85\u5904\u7406\", \"\u5904\u7406\u4e2d\", \"\u5df2\u89e3\u51b3\", \"\u5df2\u5173\u95ed\"]\n\n    if ticket_id not in TICKET_DATABASE:\n        raise ToolException(f\"\u5de5\u5355ID {ticket_id} \u4e0d\u5b58\u5728\")\n\n    if new_status not in valid_statuses:\n        raise ToolException(f\"\u72b6\u6001\u5fc5\u987b\u662f: {', '.join(valid_statuses)}\")\n\n    # \u6a21\u62df\u6743\u9650\u68c0\u67e5\u5931\u8d25\n    if new_status == \"\u5df2\u5173\u95ed\" and random.random() &lt; 0.2:\n        raise PermissionError(\"\u6743\u9650\u4e0d\u8db3\uff1a\u53ea\u6709\u7ba1\u7406\u5458\u53ef\u4ee5\u5173\u95ed\u5de5\u5355\")\n\n    TICKET_DATABASE&#91;ticket_id]&#91;\"status\"] = new_status\n    return f\"\u5de5\u5355 {ticket_id} \u72b6\u6001\u5df2\u66f4\u65b0\u4e3a: {new_status}\"\n\n\n# \u5206\u5c42\u9519\u8bef\u5904\u7406\u4e2d\u95f4\u4ef6\n@wrap_tool_call\ndef intelligent_error_handler(request, handler):\n    \"\"\"\u667a\u80fd\u9519\u8bef\u5904\u7406\uff1a\u6839\u636e\u9519\u8bef\u7c7b\u578b\u8fd4\u56de\u4e0d\u540c\u7684\u6307\u5bfc\u4fe1\u606f\"\"\"\n    try:\n        return handler(request)\n    except ConnectionError as e:\n        return ToolMessage(\n            content=f\"\u7cfb\u7edf\u6682\u65f6\u7e41\u5fd9\uff1a{str(e)}\u3002\u5efa\u8bae\u60a8\u7a0d\u540e\u91cd\u8bd5\u6b64\u64cd\u4f5c\u3002\",\n            tool_call_id=request.tool_call&#91;\"id\"]\n        )\n    except PermissionError as e:\n        return ToolMessage(\n            content=f\"\u6743\u9650\u9650\u5236\uff1a{str(e)}\u3002\u5982\u9700\u6267\u884c\u6b64\u64cd\u4f5c\uff0c\u8bf7\u8054\u7cfb\u7ba1\u7406\u5458\u3002\",\n            tool_call_id=request.tool_call&#91;\"id\"]\n        )\n    except ToolException as e:\n        return ToolMessage(\n            content=f\"\u8f93\u5165\u9a8c\u8bc1\u5931\u8d25\uff1a{str(e)}\u3002\u8bf7\u68c0\u67e5\u8f93\u5165\u53c2\u6570\u662f\u5426\u6b63\u786e\u3002\",\n            tool_call_id=request.tool_call&#91;\"id\"]\n        )\n    except Exception as e:\n        return ToolMessage(\n            content=f\"\u610f\u5916\u9519\u8bef\uff1a{str(e)}\u3002\u6280\u672f\u56e2\u961f\u5df2\u6536\u5230\u901a\u77e5\uff0c\u8bf7\u7a0d\u540e\u91cd\u8bd5\u3002\",\n            tool_call_id=request.tool_call&#91;\"id\"]\n        )\n\n\n# \u521b\u5efa\u667a\u80fd\u4f53\nagent = create_agent(\n    model=deepseek_llm,\n    tools=&#91;query_ticket, update_ticket_status],\n    middleware=&#91;intelligent_error_handler],\n    system_prompt=\"\"\"\u4f60\u662f\u4f01\u4e1a\u5ba2\u670d\u5de5\u5355\u7cfb\u7edf\u52a9\u624b\uff0c\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u67e5\u8be2\u548c\u66f4\u65b0\u5de5\u5355\u72b6\u6001\u3002\n    \u5f53\u5de5\u5177\u8c03\u7528\u5931\u8d25\u65f6\uff0c\u4f60\u4f1a\u6536\u5230\u660e\u786e\u7684\u9519\u8bef\u63d0\u793a\uff0c\u8bf7\u6839\u636e\u9519\u8bef\u7c7b\u578b\u7ed9\u4e88\u7528\u6237\u76f8\u5e94\u7684\u6307\u5bfc\u3002\"\"\"\n)\n\n\n# \u6d4b\u8bd5\u7528\u4f8b\ndef test_error():\n    \"\"\"\u6d4b\u8bd5\u5404\u79cd\u9519\u8bef\u573a\u666f\"\"\"\n    test_cases = &#91;\n        \"\u67e5\u8be2\u5de5\u5355T999\u7684\u8be6\u60c5\",  # \u4e0d\u5b58\u5728\u7684\u5de5\u5355ID\n        \"\u628a\u5de5\u5355T001\u72b6\u6001\u66f4\u65b0\u4e3a\u5b8c\u7ed3\u72b6\u6001\",  # \u65e0\u6548\u72b6\u6001\n        \"\u67e5\u8be2\u5de5\u5355T001\u7684\u8be6\u60c5\",  # \u6b63\u5e38\u67e5\u8be2\uff08\u53ef\u80fd\u89e6\u53d1\u968f\u673a\u9519\u8bef\uff09\n        \"\u5173\u95ed\u5de5\u5355T002\"  # \u6743\u9650\u76f8\u5173\u64cd\u4f5c\n    ]\n\n    for query in test_cases:\n        try:\n            print(\"=\" * 50)\n            response = agent.invoke({\n                \"messages\": &#91;{\"role\": \"user\", \"content\": query}]\n            })\n\n            print(f\"\u7528\u6237\u67e5\u8be2: {query}\")\n            # \u63d0\u53d6\u6700\u540e\u4e00\u6761\u6d88\u606f\u5185\u5bb9\n            result = response&#91;\"messages\"]&#91;-1]\n            print(f\"\u52a9\u624b\u56de\u590d: {result.content}\")\n\n\n        except Exception as e:\n            print(f\"\u7cfb\u7edf\u5f02\u5e38: {e}\")\n\n\nif __name__ == \"__main__\":\n    test_error()<\/code><\/pre>\n\n\n\n<p>\u4ee3\u7801\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>==================================================\n\u7528\u6237\u67e5\u8be2: \u67e5\u8be2\u5de5\u5355T999\u7684\u8be6\u60c5\n\u52a9\u624b\u56de\u590d: \u62b1\u6b49\uff0c\u67e5\u8be2\u5de5\u5355T999\u65f6\u9047\u5230\u4e86\u7cfb\u7edf\u7e41\u5fd9\u7684\u95ee\u9898\uff0c\u6570\u636e\u5e93\u8fde\u63a5\u8d85\u65f6\u4e86\u3002\u8fd9\u53ef\u80fd\u662f\u7531\u4e8e\uff1a\n\n1. \u6570\u636e\u5e93\u670d\u52a1\u5668\u6682\u65f6\u8fc7\u8f7d\n2. \u7f51\u7edc\u8fde\u63a5\u95ee\u9898\n3. \u7cfb\u7edf\u7ef4\u62a4\u4e2d\n\n\u5efa\u8bae\u60a8\uff1a\n- \u7a0d\u7b49\u51e0\u5206\u949f\u540e\u91cd\u8bd5\u67e5\u8be2\n- \u5982\u679c\u95ee\u9898\u6301\u7eed\u5b58\u5728\uff0c\u53ef\u80fd\u9700\u8981\u8054\u7cfb\u7cfb\u7edf\u7ba1\u7406\u5458\u68c0\u67e5\u6570\u636e\u5e93\u72b6\u6001\n\n\u60a8\u5e0c\u671b\u6211\u7a0d\u540e\u518d\u5e2e\u60a8\u67e5\u8be2\uff0c\u8fd8\u662f\u6709\u5176\u4ed6\u5de5\u5355\u9700\u8981\u5904\u7406\uff1f\n==================================================\n\u7528\u6237\u67e5\u8be2: \u628a\u5de5\u5355T001\u72b6\u6001\u66f4\u65b0\u4e3a\u5b8c\u7ed3\u72b6\u6001\n\u52a9\u624b\u56de\u590d: \u73b0\u5728\u6211\u770b\u5230\u5de5\u5355T001\u7684\u5f53\u524d\u72b6\u6001\u662f\"\u5904\u7406\u4e2d\"\u3002\u6839\u636e\u9519\u8bef\u63d0\u793a\uff0c\u53ef\u7528\u7684\u72b6\u6001\u9009\u9879\u662f\uff1a\u5f85\u5904\u7406\u3001\u5904\u7406\u4e2d\u3001\u5df2\u89e3\u51b3\u3001\u5df2\u5173\u95ed\u3002\u60a8\u8bf4\u7684\"\u5b8c\u7ed3\u72b6\u6001\"\u5e94\u8be5\u5bf9\u5e94\"\u5df2\u89e3\u51b3\"\u6216\"\u5df2\u5173\u95ed\"\u72b6\u6001\u3002\n\n\u8bf7\u95ee\u60a8\u5e0c\u671b\u5c06\u5de5\u5355T001\u66f4\u65b0\u4e3a\u54ea\u4e2a\u72b6\u6001\uff1f\n1. **\u5df2\u89e3\u51b3** - \u8868\u793a\u95ee\u9898\u5df2\u7ecf\u89e3\u51b3\uff0c\u4f46\u53ef\u80fd\u8fd8\u9700\u8981\u7528\u6237\u786e\u8ba4\n2. **\u5df2\u5173\u95ed** - \u8868\u793a\u5de5\u5355\u5df2\u7ecf\u5b8c\u5168\u7ed3\u675f\n\n\u8bf7\u544a\u8bc9\u6211\u60a8\u5e0c\u671b\u4f7f\u7528\u54ea\u4e2a\u72b6\u6001\uff0c\u6211\u5c06\u4e3a\u60a8\u66f4\u65b0\u3002\n==================================================\n\u7528\u6237\u67e5\u8be2: \u67e5\u8be2\u5de5\u5355T001\u7684\u8be6\u60c5\n\u52a9\u624b\u56de\u590d: \u6839\u636e\u67e5\u8be2\u7ed3\u679c\uff0c\u5de5\u5355T001\u7684\u8be6\u60c5\u5982\u4e0b\uff1a\n\n**\u5de5\u5355ID:** T001\n**\u6807\u9898:** \u767b\u5f55\u95ee\u9898\n**\u72b6\u6001:** \u5904\u7406\u4e2d\n**\u8d1f\u8d23\u4eba:** \u5f20\u4e09\n\n\u8fd9\u662f\u4e00\u4e2a\u5173\u4e8e\u767b\u5f55\u95ee\u9898\u7684\u5de5\u5355\uff0c\u76ee\u524d\u72b6\u6001\u4e3a\"\u5904\u7406\u4e2d\"\uff0c\u7531\u5f20\u4e09\u8d1f\u8d23\u5904\u7406\u3002\n==================================================\n\u7528\u6237\u67e5\u8be2: \u5173\u95ed\u5de5\u5355T002\n\u52a9\u624b\u56de\u590d: \u76ee\u524d\u7cfb\u7edf\u6682\u65f6\u7e41\u5fd9\uff0c\u6570\u636e\u5e93\u8fde\u63a5\u8d85\u65f6\u4e86\u3002\u5efa\u8bae\u60a8\u7a0d\u7b49\u4e00\u4f1a\u513f\u518d\u5c1d\u8bd5\u5173\u95ed\u5de5\u5355T002\u3002\n\n\u60a8\u53ef\u4ee5\uff1a\n1. \u7b49\u5f85\u51e0\u5206\u949f\u540e\u518d\u6b21\u5c1d\u8bd5\n2. \u6216\u8005\u8054\u7cfb\u7cfb\u7edf\u7ba1\u7406\u5458\u786e\u8ba4\u6570\u636e\u5e93\u8fde\u63a5\u72b6\u6001\n\n\u5982\u679c\u60a8\u77e5\u9053\u5de5\u5355T002\u7684\u5f53\u524d\u72b6\u6001\uff0c\u6211\u53ef\u4ee5\u76f4\u63a5\u5c1d\u8bd5\u5e2e\u60a8\u66f4\u65b0\u72b6\u6001\u4e3a\"\u5df2\u5173\u95ed\"\u3002\u60a8\u77e5\u9053\u8fd9\u4e2a\u5de5\u5355\u76ee\u524d\u7684\u72b6\u6001\u5417\uff1f<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Agent\u7ed3\u6784\u5316\u8f93\u51fa<\/strong><\/h2>\n\n\n\n<p>\u7ed3\u6784\u5316\u8f93\u51fa\u662fLangChain Agent\u7684\u6838\u5fc3\u529f\u80fd\u4e4b\u4e00\uff0c\u5b83\u5141\u8bb8Agent\u4ee5\u7279\u5b9a\u3001\u53ef\u9884\u6d4b\u7684\u683c\u5f0f\u8fd4\u56de\u6570\u636e\uff0c\u800c\u4e0d\u662f\u4f20\u7edf\u7684\u81ea\u7136\u8bed\u8a00\u54cd\u5e94\u3002\u901a\u8fc7\u7ed3\u6784\u5316\u8f93\u51fa\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u76f4\u63a5\u83b7\u5f97JSON\u5bf9\u8c61\u3001Pydantic\u6a21\u578b\u6216\u6570\u636e\u7c7b\u7b49\u7ed3\u6784\u5316\u6570\u636e\uff0c\u8fd9\u4e9b\u6570\u636e\u80fd\u591f\u88ab\u5e94\u7528\u7a0b\u5e8f\u76f4\u63a5\u4f7f\u7528\uff0c\u65e0\u9700\u590d\u6742\u7684\u89e3\u6790\u8fc7\u7a0b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u7ed3\u6784\u5316\u8f93\u51fa\u652f\u6301\u7684\u7b56\u7565<\/strong><\/h3>\n\n\n\n<p>LangChain\u7684create_agent\u51fd\u6570\u81ea\u52a8\u5904\u7406\u7ed3\u6784\u5316\u8f93\u51fa\u7684\u5168\u8fc7\u7a0b\u3002\u7528\u6237\u53ea\u9700\u901a\u8fc7\u201cresponse_format\u201d\u53c2\u6570\u8bbe\u7f6e\u671f\u671b\u7684\u8f93\u51fa\u6a21\u5f0f\uff08Schema\uff09\uff0c\u5f53\u6a21\u578b\u751f\u6210\u7ed3\u6784\u5316\u6570\u636e\u65f6\uff0c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u6355\u83b7\u3001\u9a8c\u8bc1\u5e76\u5c06\u7ed3\u679c\u5b58\u50a8\u5728Agent\u72b6\u6001\u7684structured_response\u952e\u4e2d\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def create_agent(\n    ...\n    response_format: Union&#91;\n        ToolStrategy&#91;StructuredResponseT],\n        ProviderStrategy&#91;StructuredResponseT],\n        type&#91;StructuredResponseT],\n        None,\n    ]<\/code><\/pre>\n\n\n\n<p>create_agent\u51fd\u6570\u4e2d\u7684response_format\u53c2\u6570\u662f\u63a7\u5236\u7ed3\u6784\u5316\u8f93\u51fa\u7684\u6838\u5fc3\u914d\u7f6e\u9879\uff0c\u652f\u6301\u56db\u79cd\u4e0d\u540c\u7684\u7b56\u7565\u8bbe\u7f6e\u65b9\u5f0f\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>ProviderStrategy[StructuredResponseT]<\/strong><\/li>\n<\/ol>\n\n\n\n<p>\u8fd9\u79cd\u8bbe\u7f6e\u65b9\u5f0f\u662f\u4f7f\u7528\u6a21\u578b\u63d0\u4f9b\u5546\u7684\u539f\u751f\u7ed3\u6784\u5316\u8f93\u51fa\u529f\u80fd\u5b9e\u73b0\u7ed3\u6784\u5316\u8f93\u51fa,\u9002\u7528\u4e8e\u652f\u6301\u539f\u751f\u7ed3\u6784\u5316\u8f93\u51fa\u7684\u6a21\u578b\u3002\u8fd9\u91cc\u6240\u8bf4\u7684\u201c\u539f\u751f\u7ed3\u6784\u5316\u8f93\u51fa\u201d\u6307\u7684\u662f\u5927\u8bed\u8a00\u6a21\u578b\uff08LLM\uff09\u63d0\u4f9b\u5546\u901a\u8fc7\u5176API\u76f4\u63a5\u63d0\u4f9b\u7684\u3001\u5728\u6a21\u578b\u54cd\u5e94\u9636\u6bb5\u5c31\u5f3a\u5236\u4fdd\u8bc1\u8f93\u51fa\u683c\u5f0f\u7b26\u5408\u9884\u5b9a\u89c4\u8303\u7684\u80fd\u529b\uff0c\u8fd9\u79cd\u80fd\u529b\u80fd\u591f\u5728\u6a21\u578b\u751f\u6210\u5185\u5bb9\u7684\u6e90\u5934\u786e\u4fdd\u7ed3\u6784\u5316\u51c6\u786e\u6027\u3002\u652f\u6301\u539f\u751f\u7ed3\u6784\u5316\u8f93\u51fa\u7684\u6a21\u578b\u6709OpenAI\u3001Anthropic Claude\u6216xAI Grok\uff08\u4e2d\u8f6ckey\u4e0d\u652f\u6301\uff09\u3002\u8fd9\u4e9b\u6a21\u578b\u6784\u5efa\u7684Agent\u7ed3\u6784\u5316\u8f93\u51fa\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528ProviderStrategy\u7b56\u7565\u3002<\/p>\n\n\n\n<p>ProviderStrategy\u4f7f\u7528\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from pydantic import BaseModel\nfrom langchain.agents import create_agent\nfrom langchain.agents.structured_output import ProviderStrategy\n\nclass ContactInfo(BaseModel):\n    name: str\n    email: str\n    phone: str\n\nagent = create_agent(\n    model=\"gpt-4o\",\n    response_format=ProviderStrategy(ContactInfo)\n)\n<\/code><\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>ToolStrategy[StructuredResponseT]<\/strong><\/li>\n<\/ol>\n\n\n\n<p>\u5bf9\u4e8e\u4e0d\u652f\u6301\u539f\u751f\u7ed3\u6784\u5316\u8f93\u51fa\u7684\u6a21\u578b\uff0cLangChain\u91c7\u7528\u201cToolStrategy\u201d\u5de5\u5177\u8c03\u7528\u7684\u65b9\u5f0f\u5b9e\u73b0\u7ed3\u6784\u5316\u8f93\u51fa\u3002\u6b64\u7b56\u7565\u517c\u5bb9\u7edd\u5927\u591a\u6570\u652f\u6301\u5de5\u5177\u8c03\u7528\u7684\u73b0\u4ee3\u6a21\u578b\uff0c\u5176\u6838\u5fc3\u539f\u7406\u662f\u52a8\u6001\u521b\u5efa\u4e00\u4e2a\"\u865a\u62df\u5de5\u5177\"\uff0c\u8be5\u5de5\u5177\u7684\u8f93\u5165\u53c2\u6570\u5bf9\u5e94\u7740\u671f\u671b\u7684\u6570\u636e\u7ed3\u6784\u3002<\/p>\n\n\n\n<p>\u5f53\u6a21\u578b\u9700\u8981\u751f\u6210\u6700\u7ec8\u7b54\u6848\u65f6\uff0c\u7cfb\u7edf\u4f1a\u5f15\u5bfc\u6a21\u578b\"\u8c03\u7528\"\u8fd9\u4e2a\u865a\u62df\u5de5\u5177\uff0c\u4ece\u800c\u95f4\u63a5\u4ea7\u751f\u7b26\u5408\u8981\u6c42\u7684\u7ed3\u6784\u5316\u6570\u636e\u3002<\/p>\n\n\n\n<p>ToolStrategy\u4f7f\u7528\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from pydantic import BaseModel\nfrom langchain.agents import create_agent\nfrom langchain.agents.structured_output import ToolStrategy\n\n\nclass ContactInfo(BaseModel):\n    name: str\n    email: str\n    phone: str\n\nagent = create_agent(\n    model=\"gpt-4o-mini\",\n    tools=&#91;search_tool],\n    response_format=ToolStrategy(ContactInfo)\n)\n\nresult = agent.invoke({\n    \"messages\": &#91;{\"role\": \"user\", \"content\": \"Extract contact info from: John Doe, john@example.com, (555) 123-4567\"}]\n})\n\nresult&#91;\"structured_response\"]\n# ContactInfo(name='John Doe', email='john@example.com', phone='(555) 123-4567')<\/code><\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>type[StructuredResponseT]<\/strong><\/li>\n<\/ol>\n\n\n\n<p>\u5f53\u76f4\u63a5\u4f20\u5165\u4e00\u4e2a\u5b9a\u4e49\u7c7b\u578b\u65f6\uff0cLangChain\u4f1a\u6839\u636e\u6a21\u578b\u80fd\u529b\u81ea\u52a8\u9009\u62e9\u7b56\u7565\uff1a\u5982\u679c\u6a21\u578b\u652f\u6301\u539f\u751f\u7ed3\u6784\u5316\u8f93\u51fa\uff08\u5982OpenAI\u3001Anthropic Claude\u6216xAI Grok\uff09\uff0c\u5219\u4f18\u5148\u4f7f\u7528ProviderStrategy\uff1b\u5426\u5219\u4f7f\u7528ToolStrategy\u3002<\/p>\n\n\n\n<p><strong>\u7279\u522b\u6ce8\u610f<\/strong>\uff1a\u5728LangChain 1.0\u53ca\u4ee5\u4e0a\u7248\u672c\u4e2d\uff0c\u76f4\u63a5\u4f20\u9012\u6a21\u5f0f\uff08\u5982response_format=ContactInfo\uff09\u4e0d\u518d\u652f\u6301\uff0c\u5fc5\u987b\u663e\u5f0f\u4f7f\u7528ToolStrategy\u6216ProviderStrategy\u3002\uff08\u7ecf\u8fc7\u6d4b\u8bd5\uff0c\u76ee\u524dlangchain1.2\u7248\u672c\u8fd8\u53ef\u4f7f\u7528\uff09\u3002<\/p>\n\n\n\n<p>type\u4f7f\u7528\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from pydantic import BaseModel, Field\nfrom langchain.agents import create_agent\n\n\nclass ContactInfo(BaseModel):\n    \"\"\"Contact information for a person.\"\"\"\n    name: str = Field(description=\"The name of the person\")\n    email: str = Field(description=\"The email address of the person\")\n    phone: str = Field(description=\"The phone number of the person\")\n\nagent = create_agent(\n    model=\"gpt-5\",\n    response_format=ContactInfo  # Auto-selects ProviderStrategy\n)\n\nresult = agent.invoke({\n    \"messages\": &#91;{\"role\": \"user\", \"content\": \"Extract contact info from: John Doe, john@example.com, (555) 123-4567\"}]\n})\n\nprint(result&#91;\"structured_response\"])\n# ContactInfo(name='John Doe', email='john@example.com', phone='(555) 123-4567')<\/code><\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>None<\/strong><\/li>\n<\/ol>\n\n\n\n<p>\u9ed8\u8ba4\u914d\u7f6e\uff0c\u8868\u793a\u4e0d\u4ee5\u7ed3\u6784\u5316\u8f93\u51fa\uff0c\u4ee5\u81ea\u7136\u8bed\u8a00\u54cd\u5e94\u7528\u6237\u95ee\u9898\u3002<\/p>\n\n\n\n<p>\u7efc\u4e0a\u6240\u8ff0\uff0c\u5728\u5b9e\u9645\u5927\u6a21\u578bAgent\u5f00\u53d1\u573a\u666f\u4e2d\uff0c\u5982\u679c\u4f7f\u7528\u5230\u4e86\u7ed3\u6784\u5316\u8f93\u51fa\uff0c\u63a8\u8350\u4f7f\u7528\u201cToolStrategy\u201d\u7b56\u7565\uff0c\u6240\u4ee5\u540e\u7eed\u91cd\u70b9\u4ecb\u7ecd\u8fd9\u79cd\u7b56\u7565\u65b9\u5f0f\u7ed3\u6784\u5316\u8f93\u51fa\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>ToolStrategy<\/strong><\/h3>\n\n\n\n<p>ToolStrategy\u901a\u8fc7\u5de5\u5177\u8c03\u7528\uff08Tool Calling\uff09\u5b9e\u73b0\u7ed3\u6784\u5316\u8f93\u51fa\uff0c\u9002\u7528\u4e8e\u4efb\u4f55\u652f\u6301\u5de5\u5177\u8c03\u7528\u7684\u73b0\u4ee3\u6a21\u578b\u3002<\/p>\n\n\n\n<p>ToolStrategy\u7684\u914d\u7f6e\u5305\u542b\u4e09\u4e2a\u4e3b\u8981\u53c2\u6570\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class ToolStrategy(Generic&#91;SchemaT]):\n    schema: type&#91;SchemaT]\n    tool_message_content: str | None\n    handle_errors: Union&#91;bool, str, type&#91;Exception], tuple&#91;type&#91;Exception], ...], Callable&#91;&#91;Exception], str]]<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>schema\uff08\u5fc5\u9700\u53c2\u6570\uff09\uff1a\u4e0e\u63d0\u4f9b\u5546\u7b56\u7565\u7684schema\u53c2\u6570\u529f\u80fd\u4e00\u81f4\uff0c\u652f\u6301Pydantic\u6a21\u578b\u3001\u6570\u636e\u7c7b\u3001TypedDict\u3001JSON Schema\uff0c\u540c\u65f6\u8fd8\u652f\u6301\u8054\u5408\u7c7b\u578b\uff08\u5141\u8bb8\u6a21\u578b\u6839\u636e\u8f93\u5165\u5185\u5bb9\u9009\u62e9\u6700\u5339\u914d\u7684\u6570\u636e\u7ed3\u6784\uff09\u3002<\/li>\n\n\n\n<li>tool_message_content\uff08\u53ef\u9009\u53c2\u6570\uff09\uff1a\u7528\u4e8e\u81ea\u5b9a\u4e49\u751f\u6210\u7ed3\u6784\u5316\u8f93\u51fa\u65f6\uff0c\u4f1a\u8bdd\u5386\u53f2\u4e2d\u8bb0\u5f55\u7684\u63d0\u793a\u4fe1\u606f\u3002\u9ed8\u8ba4\u4f7f\u7528\u5c55\u793a\u8f93\u51fa\u6570\u636e\u7684\u6807\u51c6\u54cd\u5e94\u8bed\u53e5\u3002<\/li>\n\n\n\n<li>handle_errors\uff08\u53ef\u9009\u53c2\u6570\uff09\uff1a\u7528\u4e8e\u6307\u5b9a\u6570\u636e\u6821\u9a8c\u5931\u8d25\u65f6\u7684\u91cd\u8bd5\u7b56\u7565\uff0c\u9ed8\u8ba4\u503c\u4e3aTrue\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u56db\u79cd\u7ed3\u6784\u5316\u8f93\u51faSchema<\/strong><\/h4>\n\n\n\n<p>\u4e0b\u9762\u4ee5\u6784\u5efa\u5ba2\u6237\u5173\u7cfb\u7ba1\u7406Agent\u6848\u4f8b\u6765\u6f14\u793a\u56db\u79cdSchema\u8fdb\u884c\u7ed3\u6784\u5316\u8f93\u51fa\u4ee3\u7801\u5b9e\u73b0\u3002<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Pydantic\u7c7b\u578bSchema\uff08\u63a8\u8350\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<p>Pydantic\u7c7b\u578b\u7684Scheam\u652f\u6301\u6570\u636e\u9a8c\u8bc1\uff0c<strong>\u662f\u4f18\u5148\u63a8\u8350\u4f7f\u7528\u7684\u65b9\u5f0f<\/strong>\u3002<\/p>\n\n\n\n<p>Agent\u4f7f\u7528Pydantic\u7c7b\u578bSchema\u7ed3\u6784\u5316\u8f93\u51fa\u4ee3\u7801\u5b9e\u73b0\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain_core.messages import SystemMessage\nfrom pydantic import BaseModel, Field, field_validator\nfrom typing import Literal\nfrom langchain.agents import create_agent\nfrom langchain.agents.structured_output import ToolStrategy\nfrom langchain.tools import tool\n\nfrom init_llm import deepseek_llm\n\n\n# \u5b9a\u4e49\u5de5\u5177\n@tool\ndef search_customer_database(query: str) -&gt; str:\n    \"\"\"\n    \u5728\u5ba2\u6237\u6570\u636e\u5e93\u4e2d\u641c\u7d22\u4fe1\u606f\n    Args:\n        query (str): \u5ba2\u6237\u67e5\u8be2\u5b57\u7b26\u4e32\uff0c\u4f8b\u5982 \"\u5f20\u4e09\" \u6216 \"\u674e\u56db\"\n    Returns:\n        str: \u5ba2\u6237\u8bb0\u5f55\u5b57\u7b26\u4e32\uff0c\u5305\u542b\u5ba2\u6237\u59d3\u540d\u3001\u7b49\u7ea7\u3001\u6700\u8fd1\u8d2d\u4e70\u65e5\u671f\u548c\u7d2f\u8ba1\u6d88\u8d39\n    \"\"\"\n    # \u6a21\u62df\u6570\u636e\u5e93\u67e5\u8be2\u7ed3\u679c\n    if \"\u5f20\u4e09\" in query.lower():\n        return \"\u5ba2\u6237\u8bb0\u5f55\uff1a\u5f20\u4e09\uff0cVIP\u5ba2\u6237\uff0c\u6700\u8fd1\u8d2d\u4e70\u65e5\u671f\uff1a2024-01-15\uff0c\u7d2f\u8ba1\u6d88\u8d39\uff1a$15,000\"\n    elif \"\u674e\u56db\" in query.lower():\n        return \"\u5ba2\u6237\u8bb0\u5f55\uff1a\u674e\u56db\uff0c\u666e\u901a\u5ba2\u6237\uff0c\u6700\u8fd1\u8d2d\u4e70\u65e5\u671f\uff1a2023-12-20\uff0c\u7d2f\u8ba1\u6d88\u8d39\uff1a$3,200\"\n    else:\n        return f\"\u5173\u4e8e\u5ba2\u6237{query}\uff0c\u65e0\u8bb0\u5f55\"\n\n@tool\ndef send_email(customer: str) -&gt; str:\n    \"\"\"\n    \u53d1\u9001\u611f\u8c22\u90ae\u4ef6\n    Args:\n        customer (str): \u5ba2\u6237\u540d\u79f0\uff0c\u4f8b\u5982 \"\u5f20\u4e09\" \u6216 \"\u674e\u56db\"\n    Returns:\n        str: \u786e\u8ba4\u6d88\u606f\uff0c\u5305\u542b\u5df2\u53d1\u9001\u7684\u5ba2\u6237\u540d\u79f0\n    \"\"\"\n    return f\"\u5df2\u5411 {customer} \u53d1\u9001\u611f\u8c22\u90ae\u4ef6\"\n\n\n# \u5b9a\u4e49Pydantic Schema\nclass CustomerAnalysis(BaseModel):\n    \"\"\"\u5ba2\u6237\u5206\u6790\u62a5\u544a\"\"\"\n    customer_name: str = Field(None, description=\"\u5ba2\u6237\u59d3\u540d\")\n    customer_tier: Literal&#91;\"\u6f5c\u5728\u5ba2\u6237\", \"\u666e\u901a\u5ba2\u6237\", \"VIP\u5ba2\u6237\", \"\u6d41\u5931\u98ce\u9669\"] = Field(\"\u6f5c\u5728\u5ba2\u6237\", description=\"\u5ba2\u6237\u7b49\u7ea7,\u53ea\u80fd\u662f\u6f5c\u5728\u5ba2\u6237\u3001\u666e\u901a\u5ba2\u6237\u3001VIP\u5ba2\u6237\u6216\u6d41\u5931\u98ce\u9669\")\n    recent_activity: str = Field(None, description=\"\u6700\u8fd1\u6d3b\u52a8\")\n    spending_level: Literal&#91;\"\u4f4e\", \"\u4e2d\", \"\u9ad8\"] = Field(None, description=\"\u6d88\u8d39\u6c34\u5e73\")\n    send_email: bool = Field(False, description=\"\u662f\u5426\u5df2\u53d1\u9001\u611f\u8c22\u90ae\u4ef6\")\n\n    @field_validator('spending_level')\n    def validate_spending(cls, v):\n        if v not in &#91;\"\u4f4e\", \"\u4e2d\", \"\u9ad8\"]:\n            raise ValueError('\u6d88\u8d39\u6c34\u5e73\u5fc5\u987b\u662f\"\u4f4e\"\u3001\"\u4e2d\"\u6216\"\u9ad8\"')\n        return v\n\n\n# \u521b\u5efa\u667a\u80fd\u4f53\nagent = create_agent(\n    model=deepseek_llm,\n    system_prompt=SystemMessage(content=\"\"\n                                        \"\u8bf7\u5206\u6790\u6307\u5b9a\u5ba2\u6237\u7684\u60c5\u51b5\uff1a\"\n                                        \"1. \u5148\u641c\u7d22\u5ba2\u6237\u6570\u636e\u5e93\u4e86\u89e3\u6700\u65b0\u60c5\u51b5 \"\n                                        \"2. \u5982\u679c\u662fVIP\u5ba2\u6237\uff0c\u5219\u53d1\u9001\u611f\u8c22\u90ae\u4ef6 \"\n                                        \"3. \u57fa\u4e8e\u641c\u7d22\u7ed3\u679c\u751f\u6210\u7ed3\u6784\u5316\u5206\u6790\u62a5\u544a \"\n                                        \"4. \u5982\u679c\u7528\u6237\u63d0\u95ee\u4e0e\u5ba2\u6237\u8bb0\u5f55\u65e0\u5173\u6216\u627e\u4e0d\u5230\u5ba2\u6237\u4fe1\u606f\uff0c\u5219\u8fd4\u56de\u7a7a\u5bf9\u8c61\uff0c\u4e0d\u53d1\u9001\u611f\u8c22\u90ae\u4ef6\"\n                                        ),\n    tools=&#91;search_customer_database, send_email],\n    response_format=ToolStrategy(CustomerAnalysis)\n)\n\n# \u6267\u884c\u5206\u6790\nresult = agent.invoke({\n    \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u8bf7\u5206\u6790\u5ba2\u6237\u5f20\u4e09\"}]\n    # \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u8bf7\u5206\u6790\u5ba2\u6237\u674e\u56db\"}]\n    # \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u8bf7\u5206\u6790\u5ba2\u6237\u738b\u4e94\"}]\n    # \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u4eca\u5929\u5929\u6c14\u5982\u4f55\"}]\n})\n\n\n# \u5904\u7406\u7ed3\u679c\nprint(\"result:\", result)\nif \"structured_response\" in result:\n    analysis = result&#91;\"structured_response\"]\n    print(analysis)<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u4ee3\u7801\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<p>\u6ce8\u610f\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>\u5982\u679c\u662f\u7ed3\u6784\u5316\u8f93\u51fa\uff0c\u5728\u7cfb\u7edf\u63d0\u793a\u8bcd\u4e2d\u6700\u540e\u63d0\u793a\u7ed3\u6784\u5316\u8f93\u51fa\u7ed3\u679c\uff0c\u5982\u679c\u63d0\u793a\u8bcd\u4e2d\u5148\u7ed3\u6784\u5316\u8f93\u51fa\u7ed3\u679c\uff08Agent\u5df2\u7ecf\u6267\u884c\u5b8c\u6210\uff09\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e00\u4e9b\u5de5\u5177\u4e0d\u4f1a\u518d\u88ab\u8c03\u7528\u3002<\/li>\n\n\n\n<li>\u7cfb\u7edf\u63d0\u793a\u8bcd\u4e2d\u6700\u540e\u52a0\u5165\u201c\u672a\u627e\u5230\u7528\u6237\u201d\u65f6\u7684\u5904\u7406\u63d0\u793a\uff0c\u907f\u514d\u7a0b\u5e8f\u4e00\u76f4\u8c03\u7528\u5de5\u5177\u5c1d\u8bd5\u67e5\u627e\u5bf9\u5e94\u7528\u6237\u4fe1\u606f\u3002<\/li>\n<\/ol>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>Dataclass\u7c7b\u578bSchema<\/strong><\/li>\n<\/ol>\n\n\n\n<p>Dataclass\u662fPython 3.7\u5f15\u5165\u7684\u4e00\u4e2a\u88c5\u9970\u5668\uff0c\u7528\u4e8e\u7b80\u5316\u6570\u636e\u5b58\u50a8\u7c7b\u7684\u5b9a\u4e49\u3002<\/p>\n\n\n\n<p>Agent\u4f7f\u7528Dataclass\u7c7b\u578bSchema\u7ed3\u6784\u5316\u8f93\u51fa\u4ee3\u7801\u5b9e\u73b0\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain_core.messages import SystemMessage\nfrom dataclasses import dataclass, field\nfrom typing import Literal, Optional\nfrom langchain.agents import create_agent\nfrom langchain.agents.structured_output import ToolStrategy\nfrom langchain.tools import tool\n\nfrom init_llm import deepseek_llm\n\n\n# \u5b9a\u4e49\u5de5\u5177\uff08\u4fdd\u6301\u4e0d\u53d8\uff09\n@tool\ndef search_customer_database(query: str) -&gt; str:\n    \"\"\"\n    \u5728\u5ba2\u6237\u6570\u636e\u5e93\u4e2d\u641c\u7d22\u4fe1\u606f\n    Args:\n        query (str): \u5ba2\u6237\u67e5\u8be2\u5b57\u7b26\u4e32\uff0c\u4f8b\u5982 \"\u5f20\u4e09\" \u6216 \"\u674e\u56db\"\n    Returns:\n        str: \u5ba2\u6237\u8bb0\u5f55\u5b57\u7b26\u4e32\uff0c\u5305\u542b\u5ba2\u6237\u59d3\u540d\u3001\u7b49\u7ea7\u3001\u6700\u8fd1\u8d2d\u4e70\u65e5\u671f\u548c\u7d2f\u8ba1\u6d88\u8d39\n    \"\"\"\n    # \u6a21\u62df\u6570\u636e\u5e93\u67e5\u8be2\u7ed3\u679c\n    if \"\u5f20\u4e09\" in query.lower():\n        return \"\u5ba2\u6237\u8bb0\u5f55\uff1a\u5f20\u4e09\uff0cVIP\u5ba2\u6237\uff0c\u6700\u8fd1\u8d2d\u4e70\u65e5\u671f\uff1a2024-01-15\uff0c\u7d2f\u8ba1\u6d88\u8d39\uff1a$15,000\"\n    elif \"\u674e\u56db\" in query.lower():\n        return \"\u5ba2\u6237\u8bb0\u5f55\uff1a\u674e\u56db\uff0c\u666e\u901a\u5ba2\u6237\uff0c\u6700\u8fd1\u8d2d\u4e70\u65e5\u671f\uff1a2023-12-20\uff0c\u7d2f\u8ba1\u6d88\u8d39\uff1a$3,200\"\n    else:\n        return f\"\u5173\u4e8e\u5ba2\u6237{query}\uff0c\u65e0\u8bb0\u5f55\"\n\n\n@tool\ndef send_email(customer: str) -&gt; str:\n    \"\"\"\n    \u53d1\u9001\u611f\u8c22\u90ae\u4ef6\n    Args:\n        customer (str): \u5ba2\u6237\u540d\u79f0\uff0c\u4f8b\u5982 \"\u5f20\u4e09\" \u6216 \"\u674e\u56db\"\n    Returns:\n        str: \u786e\u8ba4\u6d88\u606f\uff0c\u5305\u542b\u5df2\u53d1\u9001\u7684\u5ba2\u6237\u540d\u79f0\n    \"\"\"\n    return f\"\u5df2\u5411 {customer} \u53d1\u9001\u611f\u8c22\u90ae\u4ef6\"\n\n\n# \u4f7f\u7528Dataclass\u5b9a\u4e49Schema\n@dataclass\nclass CustomerAnalysis:\n    \"\"\"\u5ba2\u6237\u5206\u6790\u62a5\u544a\"\"\"\n    customer_name: Optional&#91;str] = field(default=None, metadata={\"description\": \"\u5ba2\u6237\u59d3\u540d\"})\n    customer_tier: Literal&#91;\"\u6f5c\u5728\u5ba2\u6237\", \"\u666e\u901a\u5ba2\u6237\", \"VIP\u5ba2\u6237\", \"\u6d41\u5931\u98ce\u9669\"] = field(\n        default=\"\u6f5c\u5728\u5ba2\u6237\",\n        metadata={\"description\": \"\u5ba2\u6237\u7b49\u7ea7,\u53ea\u80fd\u662f\u6f5c\u5728\u5ba2\u6237\u3001\u666e\u901a\u5ba2\u6237\u3001VIP\u5ba2\u6237\u6216\u6d41\u5931\u98ce\u9669\"}\n    )\n    recent_activity: Optional&#91;str] = field(default=None, metadata={\"description\": \"\u6700\u8fd1\u6d3b\u52a8\"})\n    spending_level: Optional&#91;Literal&#91;\"\u4f4e\", \"\u4e2d\", \"\u9ad8\"]] = field(default=None, metadata={\"description\": \"\u6d88\u8d39\u6c34\u5e73\"})\n    send_email: bool = field(default=False, metadata={\"description\": \"\u662f\u5426\u5df2\u53d1\u9001\u611f\u8c22\u90ae\u4ef6\"})\n\n\n# \u521b\u5efa\u667a\u80fd\u4f53\nagent = create_agent(\n    model=deepseek_llm,\n    system_prompt=SystemMessage(content=\"\"\n                                        \"\u8bf7\u5206\u6790\u6307\u5b9a\u5ba2\u6237\u7684\u60c5\u51b5\uff1a\"\n                                        \"1. \u5148\u641c\u7d22\u5ba2\u6237\u6570\u636e\u5e93\u4e86\u89e3\u6700\u65b0\u60c5\u51b5 \"\n                                        \"2. \u5982\u679c\u662fVIP\u5ba2\u6237\uff0c\u5219\u53d1\u9001\u611f\u8c22\u90ae\u4ef6 \"\n                                        \"3. \u57fa\u4e8e\u641c\u7d22\u7ed3\u679c\u751f\u6210\u7ed3\u6784\u5316\u5206\u6790\u62a5\u544a \"\n                                        \"4. \u5982\u679c\u7528\u6237\u63d0\u95ee\u4e0e\u5ba2\u6237\u8bb0\u5f55\u65e0\u5173\u6216\u627e\u4e0d\u5230\u5ba2\u6237\u4fe1\u606f\uff0c\u5219\u8fd4\u56de\u7a7a\u5bf9\u8c61\uff0c\u4e0d\u53d1\u9001\u611f\u8c22\u90ae\u4ef6\"\n                                ),\n    tools=&#91;search_customer_database, send_email],\n    response_format=ToolStrategy(CustomerAnalysis)\n)\n\n# \u6267\u884c\u5206\u6790\nresult = agent.invoke({\n    # \"messages\": &#91;{\"role\": \"user\", \"content\": \"\u8bf7\u5206\u6790\u5ba2\u6237\u5f20\u4e09\"}]\n    \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u8bf7\u5206\u6790\u5ba2\u6237\u674e\u56db\"}]\n    # \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u8bf7\u5206\u6790\u5ba2\u6237\u738b\u4e94\"}]\n    # \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u4eca\u5929\u5929\u6c14\u5982\u4f55\"}]\n})\n\n\n# \u5904\u7406\u7ed3\u679c\nprint(\"result:\", result)\nif \"structured_response\" in result:\n    analysis = result&#91;\"structured_response\"]\n    print(analysis)<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u4ee3\u7801\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1475\" height=\"71\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-9eb6831f-6e69-4923-9d1b-b0f07bcc186c.jpg\" alt=\"\" class=\"wp-image-99\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-9eb6831f-6e69-4923-9d1b-b0f07bcc186c.jpg 1475w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-9eb6831f-6e69-4923-9d1b-b0f07bcc186c-300x14.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-9eb6831f-6e69-4923-9d1b-b0f07bcc186c-1024x49.jpg 1024w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-9eb6831f-6e69-4923-9d1b-b0f07bcc186c-768x37.jpg 768w\" sizes=\"auto, (max-width: 1475px) 100vw, 1475px\" \/><\/figure>\n\n\n\n<p>\u6ce8\u610f\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Dataclass\u7684field()\u51fd\u6570\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u63a7\u5236\u9009\u9879,default\u6307\u5b9a\u9ed8\u8ba4\u503c\uff0cmetadata\u6307\u5b9a\u5b58\u50a8\u5b57\u6bb5\u7684\u5143\u6570\u636e\u4fe1\u606f\u3002<\/li>\n\n\n\n<li>Datclass \u4e0d\u652f\u6301\u8fd0\u884c\u65f6\u9a8c\u8bc1\u3002<\/li>\n\n\n\n<li><strong>TypedDict\u7c7b\u578bSchema<\/strong><\/li>\n<\/ol>\n\n\n\n<p>TypedDict \u662f Python 3.8+ \u5f15\u5165\u7684\u4e00\u79cd\u7c7b\u578b\u63d0\u793a\u5de5\u5177\uff0c\u5b83\u5141\u8bb8\u4e3a\u5b57\u5178\u5bf9\u8c61\u5b9a\u4e49\u56fa\u5b9a\u7684\u952e\u540d\u548c\u5bf9\u5e94\u7684\u503c\u7c7b\u578b,TypeDict\u662f\u4f7f\u7528 Python \u7684 TypedDict\u6765\u5b9a\u4e49\u5e26\u6709\u7c7b\u578b\u63d0\u793a\u7684\u5b57\u5178\u7ed3\u6784\uff0c\u65e0\u9700\u989d\u5916\u4f9d\u8d56\uff0c\u9002\u5408\u9700\u8981\u5feb\u901f\u5b9a\u4e49\u5b57\u5178\u7ed3\u6784\u4e14\u65e0\u9700 Pydantic \u91cd\u91cf\u7ea7\u529f\u80fd\u7684\u573a\u666f\u3002<\/p>\n\n\n\n<p>Agent\u4f7f\u7528TypedDict\u7c7b\u578bSchema\u7ed3\u6784\u5316\u8f93\u51fa\u4ee3\u7801\u5b9e\u73b0\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain_core.messages import SystemMessage\nfrom typing import Literal, Optional\nfrom typing_extensions import TypedDict, Annotated\nfrom langchain.agents import create_agent\nfrom langchain.agents.structured_output import ToolStrategy\nfrom langchain.tools import tool\n\nfrom init_llm import deepseek_llm\n\n\n# \u5b9a\u4e49\u5de5\u5177\uff08\u4fdd\u6301\u4e0d\u53d8\uff09\n@tool\ndef search_customer_database(query: str) -&gt; str:\n    \"\"\"\n    \u5728\u5ba2\u6237\u6570\u636e\u5e93\u4e2d\u641c\u7d22\u4fe1\u606f\n    Args:\n        query (str): \u5ba2\u6237\u67e5\u8be2\u5b57\u7b26\u4e32\uff0c\u4f8b\u5982 \"\u5f20\u4e09\" \u6216 \"\u674e\u56db\"\n    Returns:\n        str: \u5ba2\u6237\u8bb0\u5f55\u5b57\u7b26\u4e32\uff0c\u5305\u542b\u5ba2\u6237\u59d3\u540d\u3001\u7b49\u7ea7\u3001\u6700\u8fd1\u8d2d\u4e70\u65e5\u671f\u548c\u7d2f\u8ba1\u6d88\u8d39\n    \"\"\"\n    # \u6a21\u62df\u6570\u636e\u5e93\u67e5\u8be2\u7ed3\u679c\n    if \"\u5f20\u4e09\" in query.lower():\n        return \"\u5ba2\u6237\u8bb0\u5f55\uff1a\u5f20\u4e09\uff0cVIP\u5ba2\u6237\uff0c\u6700\u8fd1\u8d2d\u4e70\u65e5\u671f\uff1a2024-01-15\uff0c\u7d2f\u8ba1\u6d88\u8d39\uff1a$15,000\"\n    elif \"\u674e\u56db\" in query.lower():\n        return \"\u5ba2\u6237\u8bb0\u5f55\uff1a\u674e\u56db\uff0c\u666e\u901a\u5ba2\u6237\uff0c\u6700\u8fd1\u8d2d\u4e70\u65e5\u671f\uff1a2023-12-20\uff0c\u7d2f\u8ba1\u6d88\u8d39\uff1a$3,200\"\n    else:\n        return f\"\u5173\u4e8e\u5ba2\u6237{query}\uff0c\u65e0\u8bb0\u5f55\"\n\n\n@tool\ndef send_email(customer: str) -&gt; str:\n    \"\"\"\n    \u53d1\u9001\u611f\u8c22\u90ae\u4ef6\n    Args:\n        customer (str): \u5ba2\u6237\u540d\u79f0\uff0c\u4f8b\u5982 \"\u5f20\u4e09\" \u6216 \"\u674e\u56db\"\n    Returns:\n        str: \u786e\u8ba4\u6d88\u606f\uff0c\u5305\u542b\u5df2\u53d1\u9001\u7684\u5ba2\u6237\u540d\u79f0\n    \"\"\"\n    return f\"\u5df2\u5411 {customer} \u53d1\u9001\u611f\u8c22\u90ae\u4ef6\"\n\n\n# \u4f7f\u7528 TypedDict \u5b9a\u4e49\u5ba2\u6237\u5206\u6790\u62a5\u544a Schema\nclass CustomerAnalysis(TypedDict):\n    \"\"\"\u5ba2\u6237\u5206\u6790\u62a5\u544a\"\"\"\n    customer_name: Annotated&#91;Optional&#91;str], None, \"\u5ba2\u6237\u59d3\u540d\"]\n    customer_tier: Annotated&#91;Literal&#91;\"\u6f5c\u5728\u5ba2\u6237\", \"\u666e\u901a\u5ba2\u6237\", \"VIP\u5ba2\u6237\", \"\u6d41\u5931\u98ce\u9669\"], \"\u6f5c\u5728\u5ba2\u6237\", \"\u5ba2\u6237\u7b49\u7ea7\"]\n    recent_activity: Annotated&#91;Optional&#91;str], None, \"\u6700\u8fd1\u6d3b\u52a8\"]\n    spending_level: Annotated&#91;Optional&#91;Literal&#91;\"\u4f4e\", \"\u4e2d\", \"\u9ad8\"]], None, \"\u6d88\u8d39\u6c34\u5e73\"]\n    send_email: Annotated&#91;bool, False, \"\u662f\u5426\u5df2\u53d1\u9001\u611f\u8c22\u90ae\u4ef6\"]\n\n\n# \u521b\u5efa\u667a\u80fd\u4f53\nagent = create_agent(\n    model=deepseek_llm,\n    system_prompt=SystemMessage(content=\"\"\n                                        \"\u8bf7\u5206\u6790\u6307\u5b9a\u5ba2\u6237\u7684\u60c5\u51b5\uff1a\"\n                                        \"1. \u5148\u641c\u7d22\u5ba2\u6237\u6570\u636e\u5e93\u4e86\u89e3\u6700\u65b0\u60c5\u51b5 \"\n                                        \"2. \u5982\u679c\u662fVIP\u5ba2\u6237\uff0c\u5219\u53d1\u9001\u611f\u8c22\u90ae\u4ef6 \"\n                                        \"3. \u57fa\u4e8e\u641c\u7d22\u7ed3\u679c\u751f\u6210\u7ed3\u6784\u5316\u5206\u6790\u62a5\u544a \"\n                                        \"4. \u5982\u679c\u7528\u6237\u63d0\u95ee\u4e0e\u5ba2\u6237\u8bb0\u5f55\u65e0\u5173\u6216\u627e\u4e0d\u5230\u5ba2\u6237\u4fe1\u606f\uff0c\u5219\u8fd4\u56de\u7a7a\u5bf9\u8c61\uff0c\u4e0d\u53d1\u9001\u611f\u8c22\u90ae\u4ef6\"\n                                ),\n    tools=&#91;search_customer_database, send_email],\n    response_format=ToolStrategy(CustomerAnalysis)\n)\n\n# \u6267\u884c\u5206\u6790\nresult = agent.invoke({\n    # \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u8bf7\u5206\u6790\u5ba2\u6237\u5f20\u4e09\"}]\n    # \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u8bf7\u5206\u6790\u5ba2\u6237\u674e\u56db\"}]\n    \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u8bf7\u5206\u6790\u5ba2\u6237\u738b\u4e94\"}]\n    # \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u4eca\u5929\u5929\u6c14\u5982\u4f55\"}]\n})\n\n\n# \u5904\u7406\u7ed3\u679c\nprint(\"result:\", result)\nif \"structured_response\" in result:\n    analysis = result&#91;\"structured_response\"]\n    print(analysis)<\/code><\/pre>\n\n\n\n<p>\u4ee3\u7801\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1668\" height=\"79\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-fc380bc1-7154-4391-8296-ab55a53d9be8.jpg\" alt=\"\" class=\"wp-image-100\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-fc380bc1-7154-4391-8296-ab55a53d9be8.jpg 1668w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-fc380bc1-7154-4391-8296-ab55a53d9be8-300x14.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-fc380bc1-7154-4391-8296-ab55a53d9be8-1024x48.jpg 1024w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-fc380bc1-7154-4391-8296-ab55a53d9be8-768x36.jpg 768w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960123-fc380bc1-7154-4391-8296-ab55a53d9be8-1536x73.jpg 1536w\" sizes=\"auto, (max-width: 1668px) 100vw, 1668px\" \/><\/figure>\n\n\n\n<p>\u6ce8\u610f\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>TypedDict\u5b57\u6bb5\u5b9a\u4e49\u91c7\u7528 Annotated[\u7c7b\u578b, \u9ed8\u8ba4\u503c, \"\u63cf\u8ff0\"]\u683c\u5f0f<\/li>\n\n\n\n<li>\u53ef\u9009\u5b57\u6bb5\u4f7f\u7528 Optional\u5305\u88c5\uff0c\u9ed8\u8ba4\u503c\u5728 Annotated \u4e2d\u6307\u5b9a<\/li>\n\n\n\n<li>TypedDict \u4e0d\u652f\u6301\u8fd0\u884c\u65f6\u9a8c\u8bc1\u3002<\/li>\n\n\n\n<li><strong>JsonSchema\u7c7b\u578bSchema<\/strong><\/li>\n<\/ol>\n\n\n\n<p>JSON Schema\u662f\u63d0\u4f9b\u4e00\u4e2a\u6807\u51c6\u7684 JSON Schema \u5b57\u5178\u6765\u5b9a\u4e49\u7ed3\u6784\u3002\u9002\u5408\u9700\u8981\u4e0e\u591a\u79cd\u7f16\u7a0b\u8bed\u8a00\u4ea4\u4e92\u6216\u8fdb\u884c\u590d\u6742\u6570\u636e\u7ea6\u675f\u5b9a\u4e49\u7684\u573a\u666f\u3002<\/p>\n\n\n\n<p>Agent\u4f7f\u7528JsonSchema\u7c7b\u578bSchema\u7ed3\u6784\u5316\u8f93\u51fa\u4ee3\u7801\u5b9e\u73b0\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain_core.messages import SystemMessage\nfrom typing import Literal\nfrom langchain.agents import create_agent\nfrom langchain.agents.structured_output import ToolStrategy\nfrom langchain.tools import tool\n\nfrom init_llm import deepseek_llm\n\n\n# \u5b9a\u4e49\u5de5\u5177\n@tool\ndef search_customer_database(query: str) -&gt; str:\n    \"\"\"\n    \u5728\u5ba2\u6237\u6570\u636e\u5e93\u4e2d\u641c\u7d22\u4fe1\u606f\n    Args:\n        query (str): \u5ba2\u6237\u67e5\u8be2\u5b57\u7b26\u4e32\uff0c\u4f8b\u5982 \"\u5f20\u4e09\" \u6216 \"\u674e\u56db\"\n    Returns:\n        str: \u5ba2\u6237\u8bb0\u5f55\u5b57\u7b26\u4e32\uff0c\u5305\u542b\u5ba2\u6237\u59d3\u540d\u3001\u7b49\u7ea7\u3001\u6700\u8fd1\u8d2d\u4e70\u65e5\u671f\u548c\u7d2f\u8ba1\u6d88\u8d39\n    \"\"\"\n    # \u6a21\u62df\u6570\u636e\u5e93\u67e5\u8be2\u7ed3\u679c\n    if \"\u5f20\u4e09\" in query.lower():\n        return \"\u5ba2\u6237\u8bb0\u5f55\uff1a\u5f20\u4e09\uff0cVIP\u5ba2\u6237\uff0c\u6700\u8fd1\u8d2d\u4e70\u65e5\u671f\uff1a2024-01-15\uff0c\u7d2f\u8ba1\u6d88\u8d39\uff1a$15,000\"\n    elif \"\u674e\u56db\" in query.lower():\n        return \"\u5ba2\u6237\u8bb0\u5f55\uff1a\u674e\u56db\uff0c\u666e\u901a\u5ba2\u6237\uff0c\u6700\u8fd1\u8d2d\u4e70\u65e5\u671f\uff1a2023-12-20\uff0c\u7d2f\u8ba1\u6d88\u8d39\uff1a$3,200\"\n    else:\n        return f\"\u5173\u4e8e\u5ba2\u6237{query}\uff0c\u65e0\u8bb0\u5f55\"\n\n\n@tool\ndef send_email(customer: str) -&gt; str:\n    \"\"\"\n    \u53d1\u9001\u611f\u8c22\u90ae\u4ef6\n    Args:\n        customer (str): \u5ba2\u6237\u540d\u79f0\uff0c\u4f8b\u5982 \"\u5f20\u4e09\" \u6216 \"\u674e\u56db\"\n    Returns:\n        str: \u786e\u8ba4\u6d88\u606f\uff0c\u5305\u542b\u5df2\u53d1\u9001\u7684\u5ba2\u6237\u540d\u79f0\n    \"\"\"\n    return f\"\u5df2\u5411 {customer} \u53d1\u9001\u611f\u8c22\u90ae\u4ef6\"\n\n\n# \u5b9a\u4e49 JSON Schema \u66ff\u4ee3 Pydantic \u6a21\u578b\ncustomer_analysis_schema = {\n    \"title\": \"CustomerAnalysis\",\n    \"type\": \"object\",\n    \"description\": \"\u5ba2\u6237\u5206\u6790\u62a5\u544a\",\n    \"properties\": {\n        \"customer_name\": {\n            \"type\": \"string\",\n            \"default\": \"\",\n            \"description\": \"\u5ba2\u6237\u59d3\u540d\"\n        },\n        \"customer_tier\": {\n            \"type\": \"string\",\n            \"enum\": &#91;\"\u6f5c\u5728\u5ba2\u6237\", \"\u666e\u901a\u5ba2\u6237\", \"VIP\u5ba2\u6237\", \"\u6d41\u5931\u98ce\u9669\"],\n            \"default\": \"\u6f5c\u5728\u5ba2\u6237\",\n            \"description\": \"\u5ba2\u6237\u7b49\u7ea7\"\n        },\n        \"recent_activity\": {\n            \"type\": \"string\",\n            \"default\": \"\",\n            \"description\": \"\u6700\u8fd1\u6d3b\u52a8\"\n        },\n        \"spending_level\": {\n            \"type\": \"string\",\n            \"enum\": &#91;\"\u4f4e\", \"\u4e2d\", \"\u9ad8\"],\n            \"default\": \"\u4f4e\",\n            \"description\": \"\u6d88\u8d39\u6c34\u5e73\"\n        },\n        \"send_email\": {\n            \"type\": \"boolean\",\n            \"default\": False,\n            \"description\": \"\u662f\u5426\u5df2\u53d1\u9001\u611f\u8c22\u90ae\u4ef6\"\n        }\n    },\n    # \u6240\u6709\u5b57\u6bb5\u90fd\u662f\u5fc5\u987b\u8f93\u51fa\u7684\n    \"required\": &#91;\"customer_name\", \"customer_tier\", \"recent_activity\", \"spending_level\"]\n}\n\n# \u521b\u5efa\u667a\u80fd\u4f53\uff08\u4f7f\u7528 JSON Schema\u7ed3\u6784\u5316\u8f93\u51fa\uff09\nagent = create_agent(\n    model=deepseek_llm,\n    system_prompt=SystemMessage(content=\"\"\n                                        \"\u8bf7\u5206\u6790\u6307\u5b9a\u5ba2\u6237\u7684\u60c5\u51b5\uff1a\"\n                                        \"1. \u5148\u641c\u7d22\u5ba2\u6237\u6570\u636e\u5e93\u4e86\u89e3\u6700\u65b0\u60c5\u51b5 \"\n                                        \"2. \u5982\u679c\u662fVIP\u5ba2\u6237\uff0c\u5219\u53d1\u9001\u611f\u8c22\u90ae\u4ef6 \"\n                                        \"3. \u57fa\u4e8e\u641c\u7d22\u7ed3\u679c\u751f\u6210\u7ed3\u6784\u5316\u5206\u6790\u62a5\u544a \"\n                                        \"4. \u5982\u679c\u7528\u6237\u63d0\u95ee\u4e0e\u5ba2\u6237\u8bb0\u5f55\u65e0\u5173\u6216\u627e\u4e0d\u5230\u5ba2\u6237\u4fe1\u606f\uff0c\u5219\u8fd4\u56de\u7a7a\u5bf9\u8c61\uff0c\u4e0d\u53d1\u9001\u611f\u8c22\u90ae\u4ef6\"\n                                ),\n    tools=&#91;search_customer_database, send_email],\n    response_format=ToolStrategy(customer_analysis_schema)  # \u76f4\u63a5\u4f20\u5165 JSON Schema\n)\n\n# \u6267\u884c\u5206\u6790\nresult = agent.invoke({\n    # \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u8bf7\u5206\u6790\u5ba2\u6237\u5f20\u4e09\"}]\n    # \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u8bf7\u5206\u6790\u5ba2\u6237\u674e\u56db\"}]\n    # \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u8bf7\u5206\u6790\u5ba2\u6237\u738b\u4e94\"}]\n    \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u4eca\u5929\u5929\u6c14\u5982\u4f55\"}]\n})\n\n\n# \u5904\u7406\u7ed3\u679c\nprint(\"result:\", result)\nif \"structured_response\" in result:\n    analysis = result&#91;\"structured_response\"]\n    print(analysis)<\/code><\/pre>\n\n\n\n<p>\u4ee3\u7801\u8fd0\u884c\u8f93\u51fa\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1491\" height=\"76\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960124-d34e59b2-d7c2-408f-8e59-a7945f033de8.jpg\" alt=\"\" class=\"wp-image-101\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960124-d34e59b2-d7c2-408f-8e59-a7945f033de8.jpg 1491w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960124-d34e59b2-d7c2-408f-8e59-a7945f033de8-300x15.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960124-d34e59b2-d7c2-408f-8e59-a7945f033de8-1024x52.jpg 1024w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960124-d34e59b2-d7c2-408f-8e59-a7945f033de8-768x39.jpg 768w\" sizes=\"auto, (max-width: 1491px) 100vw, 1491px\" \/><\/figure>\n\n\n\n<p>\u6ce8\u610f\u4ee5\u4e0a\u4ee3\u7801\u4e2d\u5b9a\u4e49json_schema\u7684\u65f6\u5019\u6307\u5b9a\u7684title, description, type, properties, required\u662f\u662f\u9075\u5faa JSON Schema \u89c4\u8303\u7684\u6807\u51c6\u5173\u952e\u5b57\uff0c\u662f\u56fa\u5b9a\u5199\u6cd5\u3002\u51e0\u4e2a\u5173\u952e\u5b57\u7684\u89e3\u91ca\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>title\uff1a\u4e3a\u6574\u4e2a Schema \u6216\u7279\u5b9a\u5c5e\u6027\u63d0\u4f9b\u4e00\u4e2a\u4eba\u7c7b\u53ef\u8bfb\u7684\u6807\u9898\uff0c\u4e0d\u80fd\u662f\u4e2d\u6587\uff0c\u7528\u4e8e\u63d0\u9ad8\u53ef\u8bfb\u6027\u3002<\/li>\n\n\n\n<li>description\uff1a\u63d0\u4f9b\u66f4\u8be6\u7ec6\u7684\u6587\u5b57\u63cf\u8ff0\uff0c\u8bf4\u660e Schema \u6216\u5c5e\u6027\u7684\u7528\u9014\u7b49\uff0c\u548c title\u4e00\u6837\uff0c\u65e8\u5728\u5e2e\u52a9\u7406\u89e3\u3002<\/li>\n\n\n\n<li>type\uff1a\u5b9a\u4e49\u5f53\u524d\u6570\u636e\u8282\u70b9\u5fc5\u987b\u662f\u4ec0\u4e48\u6570\u636e\u7c7b\u578b\u3002\u5e38\u89c1\u7c7b\u578b\u6709 string, number, integer, boolean, object, array, null\u3002object\u5373\u662fjson\u5bf9\u8c61\u3002<\/li>\n\n\n\n<li>properties\uff1a\u7528\u4e8e\u5b9a\u4e49JSON \u5bf9\u8c61\uff08Object\uff09\u4e2d\u53ef\u4ee5\u5305\u542b\u54ea\u4e9b\u5c5e\u6027\uff08\u952e\uff09\uff0c\u4ee5\u53ca\u6bcf\u4e2a\u5c5e\u6027\u5bf9\u5e94\u7684\u503c\u7c7b\u578b\u548c\u8bf4\u660e\u3002<\/li>\n\n\n\n<li>required\uff1a\u5f53 type\u4e3a \"object\"\u65f6\u4f7f\u7528\uff0c\u662f\u4e00\u4e2a\u6570\u7ec4\uff0c\u5217\u51fa\u4e86\u5bf9\u8c61\u4e2d\u5fc5\u987b\u5b58\u5728\u7684\u5c5e\u6027\u540d\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u81ea\u5b9a\u4e49\u5de5\u5177\u6d88\u606f<\/strong><\/h4>\n\n\n\n<p>\u5728LangChain\u4e2d\uff0cToolStrategy\u7684 tool_message_content\u53c2\u6570\u5141\u8bb8\u4f60\u81ea\u5b9a\u4e49\u5de5\u5177\u8c03\u7528\u6210\u529f\u540e\uff0c\u5c06\u6307\u5b9a\u7684\u5185\u5bb9\u5199\u5165\u5bf9\u8bdd\u5386\u53f2\u7684\u63d0\u793a\u4fe1\u606f\uff0c\u8fd9\u6837\u505a\u7684\u597d\u5904\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>\u5728\u6700\u7ec8\u7528\u6237\u53ef\u89c1\u7684\u5bf9\u8bdd\u6d41\u4e2d\uff0c\u4f7f\u7528\u66f4\u81ea\u7136\u7684\u6d88\u606f\u66ff\u4ee3\u539f\u59cb\u6570\u636e\u3002<\/li>\n\n\n\n<li>\u7528\u7b80\u77ed\u7684\u786e\u8ba4\u4fe1\u606f\u66ff\u4ee3\u53ef\u80fd\u5f88\u957f\u7684\u6570\u636e\u5757\uff0c\u51cf\u5c11token\u6d88\u8017\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u5f53\u4e0d\u8bbe\u7f6e tool_message_content\u65f6\uff0c\u6a21\u578b\u6536\u5230\u7684 ToolMessage\u91cc\u5c31\u5305\u542b\u4e86\u50cf {'name': '\u5f20\u4e09', 'email': '<a href=\"mailto:zhangsan@email.com\" target=\"_blank\"  rel=\"nofollow\" >zhangsan@email.com<\/a>'... ...}\u8fd9\u6837\u7684\u5177\u4f53\u6570\u636e\uff0c\u5f53\u8bbe\u7f6e tool_message_content\u65f6,\u6a21\u578b\u6536\u5230\u7684 ToolMessage\u53ea\u662f\u4e00\u4e2a\u9884\u5b9a\u4e49\u7684\u786e\u8ba4\u4fe1\u606f\uff0c\u5982\u201c\u683c\u5f0f\u5316\u8f93\u51fa\u6210\u529f\uff01\u201d\u3002\u8fd9\u79cd\u65b9\u5f0f\u8282\u7701\u4e86\u4e0a\u4e0b\u6587\u7a97\u53e3\u7684\u4ee4\u724c\u6d88\u8017\uff0c\u5e76\u4e14\u8ba9\u5bf9\u8bdd\u6d41\u5bf9\u6700\u7ec8\u7528\u6237\u66f4\u53cb\u597d\u3002<\/p>\n\n\n\n<p><strong>\u7279\u522b\u63d0\u793a\uff1a<\/strong> \u65e0\u8bba tool_message_content\u5982\u4f55\u8bbe\u7f6e\uff0c\u6210\u529f\u63d0\u53d6\u7684\u7ed3\u6784\u5316\u6570\u636e\u6700\u7ec8\u90fd\u4f1a\u6b63\u786e\u5b58\u5165 result[\"structured_response\"]\u8fd4\u56de\uff0c\u81ea\u5b9a\u4e49\u6d88\u606f\u4ec5\u5f71\u54cd\u5bf9\u8bdd\u5386\u53f2\u4e2d\u7684\u4e00\u6761\u8bb0\u5f55\u3002<\/p>\n\n\n\n<p><strong>\u6848\u4f8b\uff1a\u81ea\u5b9a\u4e49\u5de5\u5177\u6d88\u606f\u63d0\u53d6\u7528\u6237\u4fe1\u606f\u3002<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain.agents.structured_output import ToolStrategy\nfrom langchain_core.messages import SystemMessage\nfrom pydantic import BaseModel, Field\nfrom langchain.agents import create_agent\n\nfrom init_llm import deepseek_llm\n\n\nclass ContactInfo(BaseModel):\n    \"\"\"\u4e2a\u4eba\u8054\u7cfb\u4fe1\u606f\"\"\"\n    name: str = Field(description=\"\u59d3\u540d\")\n    email: str = Field(description=\"\u7535\u5b50\u90ae\u7bb1\")\n    phone: str = Field(description=\"\u7535\u8bdd\u53f7\u7801\")\n\n\nagent = create_agent(\n    model= deepseek_llm,\n    system_prompt=SystemMessage(content=\"\u4f60\u662f\u4e00\u4e2a\u4e13\u4e1a\u7684\u8054\u7cfb\u4fe1\u606f\u63d0\u53d6\u5668\uff0c\u8d1f\u8d23\u4ece\u6587\u672c\u4e2d\u63d0\u53d6\u4e2a\u4eba\u7684\u59d3\u540d\u3001\u7535\u5b50\u90ae\u7bb1\u548c\u7535\u8bdd\u53f7\u7801\u3002\"),\n    response_format=ToolStrategy(\n        ContactInfo,\n        # tool_message_content=\"\u8054\u7cfb\u4fe1\u606f\u63d0\u53d6\u5b8c\u6210\uff01\",\n    )\n)\n\nresult = agent.invoke({\n    \"messages\": &#91;{\n        \"role\": \"user\",\n        \"content\": \"\u4ece\u4ee5\u4e0b\u5185\u5bb9\u63d0\u53d6\u8054\u7cfb\u4fe1\u606f\uff1a\u5f20\u4e09\uff0czhangsan@example.com\uff0c18812345678\"\n    }]\n})\n\nprint(\"result\", result)\n\nfor msg in result&#91;\"messages\"]:\n    msg.pretty_print()\n\nprint(result&#91;\"structured_response\"])\n<\/code><\/pre>\n\n\n\n<p>\u4f7f\u7528\u81ea\u5b9a\u4e49\u5de5\u5177\u6d88\u606f\u548c\u4e0d\u4f7f\u7528\u81ea\u5b9a\u4e49\u5de5\u5177\u6d88\u606f\u7ed3\u679c\u533a\u522b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1948\" height=\"547\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-b423db77-c9bb-45e1-a7ac-ebc9e29a1400.jpg\" alt=\"\" class=\"wp-image-108\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-b423db77-c9bb-45e1-a7ac-ebc9e29a1400.jpg 1948w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-b423db77-c9bb-45e1-a7ac-ebc9e29a1400-300x84.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-b423db77-c9bb-45e1-a7ac-ebc9e29a1400-1024x288.jpg 1024w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-b423db77-c9bb-45e1-a7ac-ebc9e29a1400-768x216.jpg 768w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-b423db77-c9bb-45e1-a7ac-ebc9e29a1400-1536x431.jpg 1536w\" sizes=\"auto, (max-width: 1948px) 100vw, 1948px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u9519\u8bef\u5904\u7406<\/strong><\/h4>\n\n\n\n<p>LangChain \u4e2d ToolStrategy\u7684\u9519\u8bef\u5904\u7406\u673a\u5236\u53ef\u4ee5\u63d0\u5347Agent\u751f\u6210\u7ed3\u6784\u5316\u8f93\u51fa\u65f6\u7684\u53ef\u9760\u6027,\u901a\u8fc7\u667a\u80fd\u91cd\u8bd5\u81ea\u52a8\u5904\u7406\u6a21\u578b\u8f93\u51fa\u4e2d\u7684\u5e38\u89c1\u9519\u8bef\uff0c\u786e\u4fdd\u6700\u7ec8\u80fd\u5f97\u5230\u7b26\u5408\u9884\u5b9a\u683c\u5f0f\u7684\u6709\u6548\u6570\u636e\u3002<\/p>\n\n\n\n<p>ToolStrategy\u901a\u8fc7\u5176 handle_errors\u53c2\u6570\u63d0\u4f9b\u4e86\u7ed3\u6784\u5316\u8fc7\u7a0b\u9519\u8bef\u5904\u7406\u7b56\u7565\uff0c\u4ee5\u4e0b\u662f\u4e3b\u8981\u7684\u51e0\u79cd\u65b9\u5f0f\u53ca\u5176\u7528\u9014\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">\u7b56\u7565<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u9002\u7528\u573a\u666f<\/td><\/tr><tr><td>handle_errors=True<\/td><td>\u9ed8\u8ba4\u65b9\u5f0f\uff0c\u6355\u83b7\u6240\u6709\u5f02\u5e38\uff0c\u5e76\u4f7f\u7528LangChain \u5185\u7f6e\u7684\u3001\u4fe1\u606f\u660e\u786e\u7684\u9519\u8bef\u6d88\u606f\u6a21\u677f\u63d0\u793a\u6a21\u578b\u91cd\u8bd5\u3002\u9002\u7528\u4e8e\u5927\u591a\u6570\u5e0c\u671b\u81ea\u52a8\u5904\u7406\u9519\u8bef\u7684\u901a\u7528\u573a\u666f\u3002<\/td><\/tr><tr><td>handle_errors=False<\/td><td>\u5173\u95ed\u81ea\u52a8\u91cd\u8bd5\u673a\u5236\uff0c\u4efb\u4f55\u5f02\u5e38\u90fd\u4f1a\u76f4\u63a5\u629b\u51fa\uff0c\u4f1a\u4e2d\u65ad\u7a0b\u5e8f\u8fd0\u884c\u3002<\/td><\/tr><tr><td>handle_errors=\"\u81ea\u5b9a\u4e49\u5b57\u7b26\u4e32\"<\/td><td>\u6355\u83b7\u6240\u6709\u5f02\u5e38\uff0c\u4f46\u4f7f\u7528\u5f00\u53d1\u8005\u9884\u8bbe\u7684\u56fa\u5b9a\u5b57\u7b26\u4e32\u4f5c\u4e3a\u9519\u8bef\u6d88\u606f\u3002\u9002\u7528\u4e8e\u9700\u8981\u7edf\u4e00\u3001\u53cb\u597d\u7684\u7528\u6237\u63d0\u793a\uff0c\u6216\u8fdb\u884c\u7279\u5b9a\u4e1a\u52a1\u5f15\u5bfc\u7684\u573a\u666f\u3002<\/td><\/tr><tr><td>handle_errors=ExceptionType<\/td><td>\u4ec5\u6355\u83b7\u6307\u5b9a\u7c7b\u578b\uff08\u5982ValueError\uff09\u6216\u5143\u7ec4\u4e2d\u7684\u5f02\u5e38\u7c7b\u578b\u5e76\u8fdb\u884c\u91cd\u8bd5\uff0c\u5176\u4ed6\u5f02\u5e38\u76f4\u63a5\u629b\u51fa\u3002\u9002\u7528\u4e8e\u9700\u8981\u7cbe\u51c6\u63a7\u5236\uff0c\u53ea\u5bf9\u7279\u5b9a\u9519\u8bef\u8fdb\u884c\u91cd\u8bd5\u7684\u573a\u666f\u3002<\/td><\/tr><tr><td>handle_errors=callable<\/td><td>\u7075\u6d3b\u6027\u6700\u9ad8\u7684\u65b9\u5f0f\u3002\u4f7f\u7528\u5f00\u53d1\u8005\u81ea\u5b9a\u4e49\u7684\u51fd\u6570\u6765\u5904\u7406\u5f02\u5e38\uff0c\u53ef\u6839\u636e\u4e0d\u540c\u7684\u5f02\u5e38\u7c7b\u578b\u8fd4\u56de\u5dee\u5f02\u5316\u7684\u63d0\u793a\u4fe1\u606f\u3002\u9002\u7528\u4e8e\u9700\u8981\u590d\u6742\u3001\u7cbe\u7ec6\u5316\u9519\u8bef\u5904\u7406\u7684\u573a\u666f\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>\u6848\u4f8b\u4e00\uff1a\u5f53\u6307\u5b9a\u591a\u4e2a\u8f93\u51fa\u7c7b\u578b\u65f6\uff0chandle_errors\u8bbe\u7f6e\u4e3aTrur\/False\/\u56fa\u5b9a\u5b57\u7b26\u4e32\u6548\u679c\u3002<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from init_llm import deepseek_llm\nfrom pydantic import BaseModel, Field\nfrom typing import Union\nfrom langchain.agents import create_agent\nfrom langchain.agents.structured_output import ToolStrategy\n\nclass ContactInfo(BaseModel):\n    \"\"\"\u4e2a\u4eba\u8054\u7cfb\u4fe1\u606f\"\"\"\n    name: str = Field(description=\"\u59d3\u540d\")\n    email: str = Field(description=\"\u7535\u5b50\u90ae\u7bb1\")\n\nclass EventDetails(BaseModel):\n    \"\"\"\u6d3b\u52a8\u8be6\u60c5\"\"\"\n    event_name: str = Field(description=\"\u6d3b\u52a8\u540d\u79f0\")\n    date: str = Field(description=\"\u6d3b\u52a8\u65e5\u671f\")\n\nagent = create_agent(\n    model= deepseek_llm,\n    tools=&#91;],\n    response_format=ToolStrategy(\n        Union&#91;ContactInfo, EventDetails],\n        tool_message_content=\"\u63d0\u53d6\u5b8c\u6210\uff01\",\n        handle_errors=True\n        #handle_errors=\"\u8bf7\u68c0\u67e5\u8f93\u5165\u6570\u636e\"\n    )\n)\n\nresult = agent.invoke({\n    \"messages\": &#91;{\n        \"role\": \"user\",\n        \"content\": f\"\u8bf7\u63d0\u53d6\u4ee5\u4e0b\u6587\u672c\u4e2d\u5185\u5bb9\uff1a\u59d3\u540d\uff1a\u5f20\u4e09\uff0c\u7535\u5b50\u90ae\u7bb1\uff1azhangsan@example.com\uff0c\u6d3b\u52a8\u540d\u79f0\uff1a\u516c\u53f8\u5e74\u4f1a\uff0c\u6d3b\u52a8\u65e5\u671f\uff1a2024-08-15\"\n    }]\n})\n\nprint(result)\n\nfor msg in result&#91;\"messages\"]:\n    msg.pretty_print()\n\nreport_data = result&#91;\"structured_response\"]\nprint(report_data)<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u4ee3\u7801handle_errors\u8bbe\u7f6e\u4e3aTure\u8fd0\u884c\u540e\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1372\" height=\"1159\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-d4e2a84a-4e66-4516-8511-ae96746d4bc0.jpg\" alt=\"\" class=\"wp-image-103\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-d4e2a84a-4e66-4516-8511-ae96746d4bc0.jpg 1372w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-d4e2a84a-4e66-4516-8511-ae96746d4bc0-300x253.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-d4e2a84a-4e66-4516-8511-ae96746d4bc0-1024x865.jpg 1024w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-d4e2a84a-4e66-4516-8511-ae96746d4bc0-768x649.jpg 768w\" sizes=\"auto, (max-width: 1372px) 100vw, 1372px\" \/><\/figure>\n\n\n\n<p>\u4ee5\u4e0a\u4ee3\u7801handle_errors\u8bbe\u7f6e\u4e3a\u201c\u8bf7\u68c0\u67e5\u8f93\u5165\u6570\u636e\u201d\u8fd0\u884c\u540e\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1040\" height=\"1088\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960126-ac9319c9-425d-44cc-9cca-fb0ca3655dc0.jpg\" alt=\"\" class=\"wp-image-102\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960126-ac9319c9-425d-44cc-9cca-fb0ca3655dc0.jpg 1040w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960126-ac9319c9-425d-44cc-9cca-fb0ca3655dc0-287x300.jpg 287w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960126-ac9319c9-425d-44cc-9cca-fb0ca3655dc0-979x1024.jpg 979w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960126-ac9319c9-425d-44cc-9cca-fb0ca3655dc0-768x803.jpg 768w\" sizes=\"auto, (max-width: 1040px) 100vw, 1040px\" \/><\/figure>\n\n\n\n<p>\u4ee5\u4e0a\u4ee3\u7801\u4e2d\u6ce8\u610f\u5982\u4e0b\u51e0\u70b9\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>ToolStrategy\u5141\u8bb8\u6307\u5b9a\u591a\u4e2a\u7c7b\u578b\u201cUnion[ContactInfo, EventDetails]\u201d\u8fd9\u79cd\u5199\u6cd5\uff0cLLM\u80fd\u591f\u6839\u636e\u8f93\u5165\u6587\u672c\u7684\u5185\u5bb9\uff0c\u667a\u80fd\u5730\u9009\u62e9\u6700\u5408\u9002\u7684\u4e00\u4e2a\u6570\u636e\u6a21\u578b\uff08Schema\uff09\u6765\u751f\u6210\u7ed3\u6784\u5316\u8f93\u51fa\uff0c\u4f46\u662f\u6700\u7ec8\u4f1a\u53ea\u6709\u4e00\u79cd\u7c7b\u578b\u8f93\u51fa\uff0c\u9002\u7528\u4e8e\u6839\u636e\u4e0d\u540c\u8f93\u5165\u5185\u5bb9\uff0c\u751f\u6210\u4e0d\u540c\u7684\u7ed3\u6784\u5316\u8f93\u51fa\u7684\u573a\u666f,\u4f46\u662f\u5e95\u5c42\u5de5\u5177\u8f6c\u6362\u7ed3\u6784\u5316\u8f93\u51fa\u53ea\u4f1a\u8f6c\u6362\u6210\u4e00\u79cd\u7ed3\u6784\u5316\u7c7b\u578b\u8f93\u51fa\u3002<\/li>\n\n\n\n<li>\u5f53ToolStrategy\u901a\u8fc7\u201cUnion[ContactInfo, EventDetails]\u201d\u6307\u5b9a\u591a\u4e2a\u7c7b\u578b\u65f6\uff0c\u5728\u5185\u90e8\u8c03\u7528\u751f\u6210\u7ed3\u6784\u5316\u7c7b\u578b\u5de5\u5177\u4f1a\u62a5\u9519\uff0c\u6b64\u65f6\uff0chandle_errors=True\uff08\u9ed8\u8ba4\u503c\uff09\u5f00\u59cb\u53d1\u6325\u4f5c\u7528,\u7cfb\u7edf\u4f1a\u751f\u6210\u4e00\u4e2aToolMessage\uff0c\u660e\u786e\u544a\u8bc9LLM\u201cError: Model incorrectly returned multiple structured responses (ContactInfo, EventDetails) when only one is expected.\u201d\uff0c\u5927\u6a21\u578b\u6536\u5230\u8fd9\u4e2a\u7cbe\u51c6\u7684\u53cd\u9988\u540e\uff0c\u4f1a\u91cd\u65b0\u8fdb\u884c\u63a8\u7406\uff0c\u6700\u7ec8\u9009\u62e9\u5e76\u8f93\u51fa\u4e00\u4e2a\u6700\u7b26\u5408\u8981\u6c42\u7684Schema\u3002\u5982\u679chandle_errors \u8bbe\u7f6e\u4e3aFalse\uff0c\u6267\u884c\u4ee3\u7801\u8fc7\u7a0b\u76f4\u63a5\u62a5\u9519\u3002<\/li>\n<\/ol>\n\n\n\n<p><strong>\u6848\u4f8b\u4e8c\uff1a\u81ea\u5b9a\u4e49\u9519\u8bef\u5904\u7406\u51fd\u6570\uff0c\u5904\u7406\u7ed3\u6784\u5316\u8f93\u51fa\u9519\u8bef\u3002<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from pydantic import BaseModel, Field\nfrom typing import Literal\nfrom langchain.agents import create_agent\nfrom langchain.agents.structured_output import ToolStrategy, StructuredOutputValidationError, \\\n    MultipleStructuredOutputsError\nfrom langchain_core.messages import SystemMessage\n\nfrom init_llm import deepseek_llm\n\n\n# \u81ea\u5b9a\u4e49\u9519\u8bef\u5904\u7406\u51fd\u6570\ndef custom_error_handler(error: Exception) -&gt; str:\n    \"\"\"\u81ea\u5b9a\u4e49\u9519\u8bef\u5904\u7406\u5668\"\"\"\n    error_str = str(error)\n\n    print(f\"\u6355\u83b7\u5230\u9519\u8bef\u7c7b\u578b: {type(error).__name__}\")\n    print(f\"\u9519\u8bef\u8be6\u60c5: {error_str}\")\n\n    if isinstance(error, StructuredOutputValidationError):\n        return \"\u8bc4\u4ef7\u6570\u636e\u683c\u5f0f\u6709\u8bef\uff0c\u8bf7\u68c0\u67e5\u5b57\u6bb5\u662f\u5426\u7b26\u5408\u8981\u6c42\u3002\u8bf7\u91cd\u65b0\u5206\u6790\u8bc4\u4ef7\u5185\u5bb9\u3002\"\n    elif isinstance(error, MultipleStructuredOutputsError):\n        return \"\u68c0\u6d4b\u5230\u591a\u4e2a\u54cd\u5e94\uff0c\u8bf7\u9009\u62e9\u6700\u76f8\u5173\u7684\u4e00\u4e2a\u8fdb\u884c\u8fd4\u56de\u3002\"\n    else:\n        return f\"Error: error_str\"\n\n# \u5b9a\u4e49\u4ea7\u54c1\u8bc4\u4ef7Schema\nclass ProductEvaluation(BaseModel):\n    \"\"\"\u4ea7\u54c1\u8bc4\u4ef7\u5206\u6790\"\"\"\n    product_name: str = Field(default=\"\", description=\"\u4ea7\u54c1\u540d\u79f0\")\n    rating: int = Field(default=1, description=\"\u8bc4\u52061-5\", ge=1, le=5)\n    sentiment: Literal&#91;\"\u6b63\u9762\", \"\u8d1f\u9762\", \"\u4e2d\u6027\"] = Field(default=\"\", description=\"\u60c5\u611f\u503e\u5411\")\n\n\n# \u521b\u5efaagent\nagent = create_agent(\n    model=deepseek_llm,\n    tools=&#91;],\n    # \u521b\u5efa\u4f1a\u8bf1\u5bfc\u9519\u8bef\u7684\u7cfb\u7edf\u63d0\u793a\n    system_prompt=SystemMessage(content=\"\"\"\n                    \u4f60\u662f\u4e00\u4e2a\u4ea7\u54c1\u8bc4\u4ef7\u5206\u6790\u52a9\u624b\u3002\u8bf7\u5206\u6790\u7528\u6237\u63d0\u4f9b\u7684\u4ea7\u54c1\u8bc4\u4ef7,\u5e76\u7ed3\u6784\u5316\u8f93\u51fa\u4ea7\u54c1\u8bc4\u4ef7\u5206\u6790\u7ed3\u679c\u3002\n                    \u5982\u679c\u8bc4\u4ef7\u4e2d\u63d0\u5230\"10\u5206\"\u6216\"\u6ee1\u5206\"\uff0c\u8bf7\u5c06rating\u8bbe\u7f6e\u4e3a10\n                    \u5982\u679c\u8bc4\u4ef7\u60c5\u611f\u590d\u6742\uff0c\u8bf7\u5c1d\u8bd5\u4f7f\u7528\"\u590d\u6742\"\u4f5c\u4e3asentiment\u503c\n                    \"\"\"),\n    response_format=ToolStrategy(\n        ProductEvaluation,\n        tool_message_content=\"\u4ea7\u54c1\u8bc4\u4ef7\u5206\u6790\u5b8c\u6210!\",\n        # handle_errors=custom_error_handler  # \u542f\u7528\u81ea\u5b9a\u4e49\u9519\u8bef\u5904\u7406\n    )\n)\n\n# \u8c03\u7528agent\nresponse = agent.invoke({\n            # \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u8fd9\u4e2a\u4ea7\u54c1\u592a\u68d2\u4e86\uff0c\u6211\u7ed95\u5206\u6ee1\u5206\uff01\u8d85\u7ea7\u559c\u6b22\uff01\"}]\n            \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u8fd9\u4e2a\u4ea7\u54c1\u592a\u68d2\u4e86\uff0c\u6211\u7ed910\u5206\uff01\u8d85\u7ea7\u559c\u6b22\uff01\"}]\n            # \"messages\": &#91;{\"role\": \"user\",\"content\": \"\u8fd9\u4e2a\u4ea7\u54c1\u7528\u8d77\u6765\u611f\u89c9\u590d\u6742\uff0c\u65e2\u597d\u53c8\u4e0d\u597d\"}]\n        })\n\n\nprint(\"response:\", response)\n\nfor msg in response&#91;\"messages\"]:\n    msg.pretty_print()\n\nif \"structured_response\" in response:\n    result = response&#91;\"structured_response\"]\n    print(result)<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u4ee3\u7801handle_errors\u4e0d\u6307\u5b9a\u81ea\u5b9a\u4e49\u9519\u8bef\u5904\u7406\uff0c\u8fd0\u884c\u540e\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1727\" height=\"1025\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-e8bf2a8b-2a1c-416c-a2d7-0bdac4638773.jpg\" alt=\"\" class=\"wp-image-106\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-e8bf2a8b-2a1c-416c-a2d7-0bdac4638773.jpg 1727w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-e8bf2a8b-2a1c-416c-a2d7-0bdac4638773-300x178.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-e8bf2a8b-2a1c-416c-a2d7-0bdac4638773-1024x608.jpg 1024w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-e8bf2a8b-2a1c-416c-a2d7-0bdac4638773-768x456.jpg 768w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-e8bf2a8b-2a1c-416c-a2d7-0bdac4638773-1536x912.jpg 1536w\" sizes=\"auto, (max-width: 1727px) 100vw, 1727px\" \/><\/figure>\n\n\n\n<p>\u4ee5\u4e0a\u4ee3\u7801handle_errors\u6307\u5b9a\u81ea\u5b9a\u4e49\u9519\u8bef\u5904\u7406\uff0c\u8fd0\u884c\u540e\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"950\" height=\"1251\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-06990697-58b5-4e44-a42c-f4137296ad7e.jpg\" alt=\"\" class=\"wp-image-104\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-06990697-58b5-4e44-a42c-f4137296ad7e.jpg 950w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-06990697-58b5-4e44-a42c-f4137296ad7e-228x300.jpg 228w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-06990697-58b5-4e44-a42c-f4137296ad7e-778x1024.jpg 778w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-06990697-58b5-4e44-a42c-f4137296ad7e-768x1011.jpg 768w\" sizes=\"auto, (max-width: 950px) 100vw, 950px\" \/><\/figure>\n\n\n\n<p>\u4ee5\u4e0a\u4ee3\u7801\u4e2d\u6ce8\u610f\u5982\u4e0b\u51e0\u70b9\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>\u5f53\u683c\u5f0f\u5316\u8f93\u51fa\u6709\u9519\u8bef\u65f6\uff0cAgent\u5185\u90e8\u4f1a\u8fdb\u884c\u5de5\u5177\u8c03\u7528\u91cd\u8bd5\uff0c\u76f4\u5230\u7b26\u5408\u8981\u6c42\u683c\u5f0f\u5316\u8f93\u51fa\u524d\uff0c\u53ef\u80fd\u4f1a\u8fdb\u884c\u591a\u6b21\u91cd\u8bd5\u3002<\/li>\n\n\n\n<li>\u5bf9\u4e8e\u7528\u6237\u7b26\u5408\u63d0\u793a\u8bcd\u7684\u9519\u8bef\u8bc4\u4ef7\uff0cAgent\u53ef\u80fd\u4f1a\u8f93\u51fa\u6b63\u786e\u7ed3\u679c\uff0c\u8fd9\u65f6\u9700\u8981\u5c1d\u8bd5\u8fdb\u4e00\u6b65\u8c03\u6574\u63d0\u793a\u8bcd\u8fdb\u884c\u9650\u5236\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Agent\u5f02\u6b65\u8c03\u7528<\/strong><\/h2>\n\n\n\n<p>LangChain Agent \u901a\u8fc7 agent.ainvoke(...)\u65b9\u6cd5\u652f\u6301\u5f02\u6b65\u8c03\u7528\uff0c\u5176\u5e95\u5c42\u57fa\u4e8e Python \u7684 asyncio\u5e93\u3002\u8be5\u673a\u5236\u7684\u6838\u5fc3\u4f18\u52bf\u5728\u4e8e\uff0c\u5f53 Agent \u6267\u884c\u8fc7\u7a0b\u4e2d\u9700\u8981\u8c03\u7528\u5916\u90e8\u5de5\u5177\uff08\u5982\u67e5\u8be2\u7f51\u7edc\u6216\u8bbf\u95ee\u6570\u636e\u5e93\uff09\u65f6\uff0c\u5f02\u6b65\u7248\u672c\u4e0d\u4f1a\u963b\u585e\u4ee5\u7b49\u5f85\u7ed3\u679c\u8fd4\u56de\uff0c\u800c\u662f\u4f1a\u6682\u505c\u5f53\u524d\u4efb\u52a1\uff0c\u5c06 CPU \u63a7\u5236\u6743\u4ea4\u8fd8\u7ed9\u4e8b\u4ef6\u5faa\u73af\uff0c\u4ee5\u6267\u884c\u5176\u4ed6\u5c31\u7eea\u7684\u4efb\u52a1\u3002\u5f85\u76f8\u5e94\u7684 I\/O \u64cd\u4f5c\u5b8c\u6210\u540e\uff0c\u4e8b\u4ef6\u5faa\u73af\u518d\u8c03\u5ea6\u8be5 Agent \u7ee7\u7eed\u6267\u884c\u3002<\/p>\n\n\n\n<p>\u8fd9\u79cd\u57fa\u4e8e\u4e8b\u4ef6\u5faa\u73af\u7684\u5f02\u6b65\u8c03\u5ea6\u673a\u5236\uff0c\u80fd\u663e\u8457\u63d0\u5347\u9700\u8981\u96c6\u6210\u591a\u4e2a\u5916\u90e8\u670d\u52a1\u6216API \u7684 Agent \u7684\u6267\u884c\u6548\u7387\u3002\u4f8b\u5982\uff0c\u5f53\u4e00\u4e2a\u65c5\u884c\u89c4\u5212Agent\u9700\u8981\u540c\u65f6\u67e5\u8be2\u822a\u73ed\u3001\u9152\u5e97\u548c\u5929\u6c14\u65f6\uff0c\u5f02\u6b65\u673a\u5236\u5141\u8bb8\u5728\u7b49\u5f85\u8fd9\u4e9b\u5916\u90e8API\u8fd4\u56de\u7ed3\u679c\u7684\u671f\u95f4\uff0c\u4e8b\u4ef6\u5faa\u73af\u80fd\u591f\u53bb\u6267\u884c\u7a0b\u5e8f\u4e2d\u7684\u5176\u4ed6\u5c31\u7eea\u4efb\u52a1\uff0c\u4ece\u800c\u907f\u514dCPU\u7a7a\u95f2\u7b49\u5f85\uff0c\u5927\u5e45\u63d0\u5347\u6574\u4f53\u6548\u7387\u3002<\/p>\n\n\n\n<p><strong>\u6848\u4f8b\uff1a\u667a\u80fd\u65c5\u884c\u89c4\u5212\u52a9\u624bAgent\uff0c\u53ef\u4ee5\u67e5\u8be2\u591a\u4e2a\u57ce\u5e02\u7684\u5929\u6c14\u3001\u4ea4\u901a\u548c\u666f\u70b9\u4fe1\u606f\u3002<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import asyncio\nfrom typing import Dict, Any\nfrom langchain.agents import create_agent\nfrom langchain.tools import tool\nfrom langgraph.graph.state import CompiledStateGraph\n\nfrom init_llm import deepseek_llm\n\n\n# 1. \u5b9a\u4e49\u5de5\u5177\n@tool\ndef get_weather(city: str) -&gt; str:\n    \"\"\"\n    \u83b7\u53d6\u6307\u5b9a\u57ce\u5e02\u7684\u5929\u6c14\u4fe1\u606f\u3002\n    Args\uff1a\n        city (str): \u8981\u67e5\u8be2\u5929\u6c14\u7684\u57ce\u5e02\u540d\u79f0\u3002\n    Returns\uff1a\n        str: \u5305\u542b\u57ce\u5e02\u5929\u6c14\u4fe1\u606f\u7684\u5b57\u7b26\u4e32\u3002\n    \"\"\"\n    weather_data = {\n        \"\u5317\u4eac\": \"\u6674\u6717\uff0c15\u00b0C\",\n        \"\u4e0a\u6d77\": \"\u591a\u4e91\uff0c18\u00b0C\",\n        \"\u5e7f\u5dde\": \"\u5c0f\u96e8\uff0c22\u00b0C\",\n        \"\u6df1\u5733\": \"\u6674\u95f4\u591a\u4e91\uff0c25\u00b0C\"\n    }\n    return f\"{city}\u7684\u5929\u6c14\uff1a{weather_data.get(city, '\u4fe1\u606f\u6682\u7f3a')}\"\n\n\n@tool\ndef get_transport_info(from_city: str, to_city: str) -&gt; str:\n    \"\"\"\n    \u67e5\u8be2\u4e24\u4e2a\u57ce\u5e02\u4e4b\u95f4\u7684\u4ea4\u901a\u4fe1\u606f\u3002\n    Args\uff1a\n        from_city (str): \u51fa\u53d1\u57ce\u5e02\u540d\u79f0\u3002\n        to_city (str): \u5230\u8fbe\u57ce\u5e02\u540d\u79f0\u3002\n    Returns\uff1a\n        str: \u5305\u542b\u4ea4\u901a\u4fe1\u606f\u7684\u5b57\u7b26\u4e32\u3002\n    \"\"\"\n    transport_data = {\n        \"\u5317\u4eac-\u4e0a\u6d77\": \"\u9ad8\u94c1\u7ea64.5\u5c0f\u65f6\uff0c\u822a\u73ed\u7ea62\u5c0f\u65f6\",\n        \"\u4e0a\u6d77-\u5e7f\u5dde\": \"\u9ad8\u94c1\u7ea67\u5c0f\u65f6\uff0c\u822a\u73ed\u7ea62.5\u5c0f\u65f6\",\n        \"\u5e7f\u5dde-\u6df1\u5733\": \"\u9ad8\u94c1\u7ea60.5\u5c0f\u65f6\uff0c\u9a7e\u8f66\u7ea61.5\u5c0f\u65f6\"\n    }\n    key = f\"{from_city}-{to_city}\"\n    return f\"{from_city}\u5230{to_city}\uff1a{transport_data.get(key, '\u8bf7\u67e5\u8be2\u5177\u4f53\u73ed\u6b21')}\"\n\n\n@tool\ndef get_scenic_spots(city: str, interest_type: str = \"\u901a\u7528\") -&gt; str:\n    \"\"\"\n    \u6839\u636e\u5174\u8da3\u7c7b\u578b\u63a8\u8350\u57ce\u5e02\u666f\u70b9\u3002\n    Args\uff1a\n        city (str): \u8981\u67e5\u8be2\u666f\u70b9\u7684\u57ce\u5e02\u540d\u79f0\u3002\n        interest_type (str, optional): \u5174\u8da3\u7c7b\u578b\uff0c\u9ed8\u8ba4\u503c\u4e3a\"\u901a\u7528\"\u3002\n    Returns\uff1a\n        str: \u5305\u542b\u666f\u70b9\u63a8\u8350\u7684\u5b57\u7b26\u4e32\u3002\n    \"\"\"\n    scenic_spots_data = {\n        \"\u5317\u4eac\": {\n            \"\u5386\u53f2\": \"\u63a8\u8350\uff1a\u6545\u5bab\u3001\u5929\u575b\u3001\u957f\u57ce\",\n            \"\u7f8e\u98df\": \"\u63a8\u8350\uff1a\u5168\u805a\u5fb7\u70e4\u9e2d\u3001\u738b\u5e9c\u4e95\u5c0f\u5403\u8857\",\n            \"\u901a\u7528\": \"\u63a8\u8350\uff1a\u6545\u5bab\u3001\u957f\u57ce\u3001\u9890\u548c\u56ed\u3001\u5929\u575b\"\n        },\n        \"\u4e0a\u6d77\": {\n            \"\u73b0\u4ee3\": \"\u63a8\u8350\uff1a\u5916\u6ee9\u3001\u4e1c\u65b9\u660e\u73e0\u3001\u9646\u5bb6\u5634\",\n            \"\u6587\u5316\": \"\u63a8\u8350\uff1a\u535a\u7269\u9986\u3001\u827a\u672f\u9986\u3001\u7530\u5b50\u574a\",\n            \"\u901a\u7528\": \"\u63a8\u8350\uff1a\u5916\u6ee9\u3001\u8fea\u58eb\u5c3c\u3001\u5357\u4eac\u8def\"\n        }\n    }\n    city_scenic_spots = scenic_spots_data.get(city, {})\n    recommendation = city_scenic_spots.get(interest_type, city_scenic_spots.get(\"\u901a\u7528\", \"\u6682\u65e0\u63a8\u8350\"))\n    return f\"{city}{interest_type}\u666f\u70b9\uff1a{recommendation}\"\n\n\n# 2. \u521b\u5efa\u667a\u80fd\u4f53\ndef create_travel_agent() -&gt; CompiledStateGraph:\n    \"\"\"\u521b\u5efa\u65c5\u884c\u89c4\u5212\u667a\u80fd\u4f53\"\"\"\n    # \u521b\u5efa\u667a\u80fd\u4f53\n    agent = create_agent(\n        model=deepseek_llm,\n        tools=&#91;get_weather, get_transport_info, get_scenic_spots],\n        system_prompt=\"\u4f60\u662f\u4e00\u4e2a\u4e13\u4e1a\u7684\u65c5\u884c\u89c4\u5212\u52a9\u624b\uff0c\u80fd\u591f\u5e2e\u52a9\u7528\u6237\u67e5\u8be2\u5929\u6c14\u3001\u4ea4\u901a\u548c\u666f\u70b9\u4fe1\u606f\u3002\u62d2\u7edd\u56de\u7b54\u4e0e\u65c5\u884c\u89c4\u5212\u65e0\u5173\u7684\u95ee\u9898\u3002\",\n    )\n    return agent\n\n\n# 3. \u987a\u5e8f\u5f02\u6b65\u67e5\u8be2\u51fd\u6570\nasync def async_sequential_query() -&gt; Dict&#91;str, Any]:\n    # \u521b\u5efa\u667a\u80fd\u4f53\u5b9e\u4f8b\n    agent = create_travel_agent()\n\n    # \u5f02\u6b65\u8c03\u7528\u667a\u80fd\u4f53\n    response = await agent.ainvoke({\"messages\": &#91;\n        {\"role\": \"user\", \"content\": \"\u8bf7\u5e2e\u6211\u67e5\u8be2\u5317\u4eac\u7684\u5929\u6c14\u4fe1\u606f\uff0c\u5e76\u63a8\u8350\u4e00\u4e9b\u5386\u53f2\u7c7b\u578b\u7684\u666f\u70b9\"},\n        {\"role\": \"user\", \"content\": \"\u6211\u8981\u4ece\u5317\u4eac\u51fa\u53d1\u5230\u4e0a\u6d77\uff0c\u8bf7\u5e2e\u6211\u67e5\u8be2\u4e0a\u6d77\u7684\u5929\u6c14\u4fe1\u606f\uff0c\u5e76\u63a8\u8350\u4e00\u4e9b\u73b0\u4ee3\u7c7b\u578b\u7684\u666f\u70b9\"},\n        {\"role\": \"user\", \"content\": \"\u5929\u7a7a\u4e3a\u4ec0\u4e48\u662f\u84dd\u8272\u7684\"},\n    ]})\n\n    return response\n\n\n# 4. \u8fd0\u884c\u7a0b\u5e8f\nif __name__ == \"__main__\":\n   response = asyncio.run(async_sequential_query())\n   print(response)\n   print(response&#91;'messages']&#91;-1].content)<\/code><\/pre>\n\n\n\n<p>\u4ee3\u7801\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u6839\u636e\u60a8\u7684\u9700\u6c42\uff0c\u6211\u4e3a\u60a8\u6574\u7406\u4e86\u4ee5\u4e0b\u65c5\u884c\u4fe1\u606f\uff1a\n\n## \u5317\u4eac\u4fe1\u606f\n**\u5929\u6c14**\uff1a\u6674\u6717\uff0c15\u00b0C\n**\u5386\u53f2\u666f\u70b9\u63a8\u8350**\uff1a\n1. \u6545\u5bab\n2. \u5929\u575b\n3. \u957f\u57ce\n\n## \u4e0a\u6d77\u4fe1\u606f\n**\u5929\u6c14**\uff1a\u591a\u4e91\uff0c18\u00b0C\n**\u73b0\u4ee3\u666f\u70b9\u63a8\u8350**\uff1a\n1. \u5916\u6ee9\n2. \u4e1c\u65b9\u660e\u73e0\n3. \u9646\u5bb6\u5634\n\n## \u5317\u4eac\u5230\u4e0a\u6d77\u4ea4\u901a\u4fe1\u606f\n- **\u9ad8\u94c1**\uff1a\u7ea64.5\u5c0f\u65f6\n- **\u822a\u73ed**\uff1a\u7ea62\u5c0f\u65f6\n\n\u5173\u4e8e\"\u5929\u7a7a\u4e3a\u4ec0\u4e48\u662f\u84dd\u8272\u7684\"\u8fd9\u4e2a\u95ee\u9898\uff0c\u8fd9\u662f\u4e00\u4e2a\u79d1\u5b66\u95ee\u9898\uff0c\u4e0e\u65c5\u884c\u89c4\u5212\u65e0\u5173\uff0c\u6211\u65e0\u6cd5\u56de\u7b54\u3002\u5982\u679c\u60a8\u6709\u5176\u4ed6\u65c5\u884c\u76f8\u5173\u7684\u95ee\u9898\uff0c\u6211\u5f88\u4e50\u610f\u4e3a\u60a8\u63d0\u4f9b\u5e2e\u52a9\uff01<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Agent\u6d41\u5f0f\u8f93\u51fa\u53ca\u6a21\u5f0f<\/strong><\/h2>\n\n\n\n<p><strong>Agent\u6d41\u5f0f\u8f93\u51fa<\/strong><\/p>\n\n\n\n<p>LangChain \u5b9e\u73b0\u4e86\u4e00\u5957\u5f3a\u5927\u7684\u6d41\u5f0f\u4f20\u8f93\u7cfb\u7edf\uff0c\u7528\u4e8e\u5b9e\u65f6\u663e\u793a Agent \u8fd0\u884c\u8fc7\u7a0b\u4e2d\u7684\u66f4\u65b0\u3002\u6d41\u5f0f\u4f20\u8f93\u901a\u8fc7\u6e10\u8fdb\u5f0f\u663e\u793a\u8f93\u51fa\uff08\u5373\u4f7f\u5728\u5b8c\u6574\u54cd\u5e94\u51c6\u5907\u597d\u4e4b\u524d\uff09\u6765\u663e\u8457\u6539\u5584\u7528\u6237\u4f53\u9a8c\uff0c\u7279\u522b\u662f\u5728\u5904\u7406 LLM \u5ef6\u8fdf\u65f6\u5c24\u5176\u6709\u6548\u3002<\/p>\n\n\n\n<p>\u6d41\u5f0f\u8f93\u51fa\u597d\u5904\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5927\u578b\u8bed\u8a00\u6a21\u578b\u751f\u6210\u5b8c\u6574\u54cd\u5e94\u901a\u5e38\u9700\u8981\u51e0\u79d2\u949f\u65f6\u95f4\uff0c\u5bf9\u4e8e\u957f\u8f93\u51fa\u53ef\u80fd\u8fbe\u523010-20 \u79d2,\u7528\u6237\u671f\u671b\u5373\u65f6\u53cd\u9988\uff0c\u6d41\u5f0f\u4f20\u8f93\u8ba9\u7b49\u5f85\u8fc7\u7a0b\u66f4\u52a0\u53ef\u63a7\u3002<\/li>\n\n\n\n<li>\u76f8\u6bd4\u975e\u6d41\u5f0f\u4f20\u8f93\u9700\u8981\u7528\u6237\u957f\u65f6\u95f4\u7b49\u5f85\u5b8c\u6574\u54cd\u5e94\uff0c\u6d41\u5f0f\u4f20\u8f93\u53ef\u4ee5\u7acb\u5373\u663e\u793a\u6587\u5b57\u9010\u6e10\u51fa\u73b0\u7684\u6548\u679c\uff0c\u5927\u5e45\u964d\u4f4e\u7528\u6237\u7684\u7b49\u5f85\u7126\u8651\u3002<\/li>\n<\/ul>\n\n\n\n<p>Agent\u4e2d\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u201cstream\u201d\u6765\u542f\u7528\u6d41\u5f0f\u8f93\u51fa\u7ed3\u679c\u3002\u5982\u4e0b\u6848\u4f8b\u662f\u4e00\u4e2a\u67e5\u8be2\u5ba2\u6237\u4fe1\u606f\u7684Agent\uff0c\u8be5Agent\u53ef\u4ee5\u8c03\u7528\u201cquery_customer_data\u201d\uff08\u67e5\u8be2\u5ba2\u6237\u57fa\u672c\u4fe1\u606f\uff09\u3001\u201ccheck_order_history\u201d\uff08\u68c0\u67e5\u5386\u53f2\u8ba2\u5355\uff09\u3001\u201cget_current_promotions\u201d\uff08\u83b7\u53d6\u5f53\u524d\u4fc3\u9500\u6d3b\u52a8\uff09\u4e09\u4e2a\u5de5\u5177\u8fdb\u884c\u7528\u6237\u4fe1\u606f\u67e5\u8be2\u3002\u5177\u4f53\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain.agents import create_agent\nfrom langchain.tools import tool\nfrom typing import Dict, Any\n\nfrom init_llm import deepseek_llm\n\n\n@tool\ndef query_customer_data(customer_id: str) -&gt; Dict&#91;str, Any]:\n    \"\"\"\n    \u67e5\u8be2\u5ba2\u6237\u57fa\u672c\u4fe1\u606f\n    Args:\n        customer_id: \u5ba2\u6237ID\uff0c\u7528\u4e8e\u552f\u4e00\u6807\u8bc6\u5ba2\u6237\n    Returns:\n        \u5305\u542b\u5ba2\u6237\u57fa\u672c\u4fe1\u606f\u7684\u5b57\u5178\uff0c\u5982\u59d3\u540d\u3001\u7b49\u7ea7\u3001\u52a0\u5165\u65e5\u671f\u7b49\n    \"\"\"\n    # \u6a21\u62df\u6570\u636e\u5e93\u67e5\u8be2\n    return {\"name\": \"\u5f20\u4e09\",\"level\": \"VIP\",\"join_date\": \"2023-01-15\"}\n\n\n@tool\ndef check_order_history(customer_id: str) -&gt; Dict&#91;str, Any]:\n    \"\"\"\n    \u67e5\u8be2\u5ba2\u6237\u8ba2\u5355\u5386\u53f2\n    Args:\n        customer_id: \u5ba2\u6237ID\uff0c\u7528\u4e8e\u552f\u4e00\u6807\u8bc6\u5ba2\u6237\n    Returns:\n        \u5305\u542b\u5ba2\u6237\u8ba2\u5355\u5386\u53f2\u7684\u5b57\u5178\uff0c\u5982\u603b\u8ba2\u5355\u6570\u3001\u603b\u82b1\u8d39\u7b49\n    \"\"\"\n    return {\"total_orders\": 15,\"total_spent\": 25800.00}\n\n\n@tool\ndef get_current_promotions() -&gt; Dict&#91;str, Any]:\n    \"\"\"\n    \u83b7\u53d6\u5f53\u524d\u53ef\u7528\u4fc3\u9500\u6d3b\u52a8\n    Returns:\n        \u5305\u542b\u5f53\u524d\u53ef\u7528\u4fc3\u9500\u6d3b\u52a8\u7684\u5b57\u5178\uff0c\u5982\u6d3b\u52a8\u540d\u79f0\u3001\u6709\u6548\u65e5\u671f\u7b49\n    \"\"\"\n    return {\n        \"promotions\": &#91;\"\u8001\u7528\u6237\u4f18\u60e0\", \"\u4f1a\u5458\u4e13\u5c5e\u6298\u6263\"],\n        \"valid_until\": \"2027-01-31\"\n    }\n\n\n# \u521b\u5efa\u5ba2\u6237\u670d\u52a1Agent\ncustomer_service_agent = create_agent(\n    model=deepseek_llm,\n    system_prompt=\"\u4f60\u662f\u4e00\u4e2a\u4e13\u4e1a\u7684\u5ba2\u6237\u670d\u52a1\u667a\u80fd\u4f53\uff0c\u8d1f\u8d23\u56de\u7b54\u5ba2\u6237\u5173\u4e8e\u8d26\u6237\u4fe1\u606f\u3001\u8ba2\u5355\u5386\u53f2\u548c\u4fc3\u9500\u6d3b\u52a8\u7684\u95ee\u9898\u3002\",\n    tools=&#91;query_customer_data, check_order_history, get_current_promotions]\n)\n\n\nfor chunk in customer_service_agent.stream(\n        {\"messages\": &#91;{\n            \"role\": \"user\",\n            \"content\": \"\u67e5\u8be2\u5ba2\u6237ID\u4e3a CUST123456 \u7684\u5b8c\u6574\u4fe1\u606f\u548c\u53ef\u7528\u4f18\u60e0\"\n        }]}\n):\n    print(chunk)\n    print(\"-\" * 50)<\/code><\/pre>\n\n\n\n<p>\u4ee3\u7801\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1783\" height=\"456\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-a0ec1731-f9aa-4767-85db-6b005f1937fc.jpg\" alt=\"\" class=\"wp-image-107\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-a0ec1731-f9aa-4767-85db-6b005f1937fc.jpg 1783w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-a0ec1731-f9aa-4767-85db-6b005f1937fc-300x77.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-a0ec1731-f9aa-4767-85db-6b005f1937fc-1024x262.jpg 1024w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-a0ec1731-f9aa-4767-85db-6b005f1937fc-768x196.jpg 768w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-a0ec1731-f9aa-4767-85db-6b005f1937fc-1536x393.jpg 1536w\" sizes=\"auto, (max-width: 1783px) 100vw, 1783px\" \/><\/figure>\n\n\n\n<p>\u4ee5\u4e0a\u4ee3\u7801\u4e2d\u201cagent.stream(...)\u201d\u8fd4\u56de\u4e00\u4e2a\u201cIterator[dict[str, Any] | Any]\u201d\u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u4e2d\u7684dict\u4f1a\u6709\u201cmodel\u201d\uff08\u6a21\u578b\u8c03\u7528\uff09\u548c\u201ctools\u201d\uff08\u5de5\u5177\u8c03\u7528\uff09\u4e24\u4e2akey\uff0c\u5206\u522b\u5bf9\u5e94\u6a21\u578b\/\u5de5\u5177\u8c03\u7528\u8f93\u51fa\u7684\u7ed3\u679c\uff0c\u8fd9\u4e9b\u7ed3\u679c\u4ee5\u6d41\u5f0f\u4ea4\u53c9\u8f93\u51fa\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u60f3\u8981\u83b7\u53d6\u6a21\u578b\/\u5de5\u5177\u8f93\u51fa\u7684\u7ed3\u679c\uff0c\u4e5f\u53ef\u4ee5\u6309\u7167\u5982\u4e0b\u65b9\u5f0f\u83b7\u53d6\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>for chunk in customer_service_agent.stream(\n        {\"messages\": &#91;{\n            \"role\": \"user\",\n            \"content\": \"\u67e5\u8be2\u5ba2\u6237ID\u4e3a CUST123456 \u7684\u5b8c\u6574\u4fe1\u606f\u548c\u53ef\u7528\u4f18\u60e0\"\n        }]}\n):\n    for step, data in chunk.items(): # \u904d\u5386dict\u7684key-value\u5bf9\n        if step == \"model\":\n            last_message = data&#91;\"messages\"]&#91;-1]\n            if last_message.content:\n                print(f\"AI\u56de\u590d: {last_message.content}\")\n\n            if last_message.tool_calls:\n                print(f\"AI\u51b3\u5b9a\u8c03\u7528\u5de5\u5177: {&#91;tc&#91;'name'] for tc in last_message.tool_calls]}\")\n\n        elif step == \"tools\":\n            tool_result = data&#91;\"messages\"]&#91;-1]\n            print(f\"\u6267\u884c\u5de5\u5177:{tool_result.name}, \u5de5\u5177\u8fd4\u56de\u7ed3\u679c\uff1a{tool_result.content}\")\n        print(\"-\" * 50)<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Agent\u6d41\u5f0f\u8f93\u51fa\u6a21\u5f0f<\/strong><\/h3>\n\n\n\n<p>Agent\u9ed8\u8ba4\u8f93\u51fa\u6a21\u5f0f\u662f\u201c\u6a21\u578b\u601d\u8003-\u5de5\u5177\u8c03\u7528\u201dReAct\u5faa\u73af\u8c03\u7528\uff0c\u6700\u7ec8\u8f93\u51fa\u5927\u6a21\u578b\u7ed3\u679c\uff0c\u9664\u4e86\u8fd9\u79cd\u8f93\u51fa\u6a21\u5f0f\u5916\uff0cAgent\u8fd8\u652f\u6301\u5982\u4e0b\u8f93\u51fa\u6a21\u5f0f\uff1avalues\u3001updates\uff08\u9ed8\u8ba4\uff09\u3001messages\u3001custom\u3001checkpoints\u3001tasks\u3001debug\uff0c\u8fd9\u4e9b\u6a21\u5f0f\u90fd\u662f\u901a\u8fc7\u201cAgent.stream(stream_mode=\u6307\u5b9a\u6a21\u5f0f\uff0c\u9ed8\u8ba4\u4e3aNone)\u201d\u6765\u6307\u5b9a\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>values\u8f93\u51fa\u6a21\u5f0f<\/strong><\/h4>\n\n\n\n<p>\u5f53stream_mode\u8bbe\u7f6e\u4e3avalues\u6a21\u5f0f\u65f6\uff0c\u6bcf\u4e2a\u6b65\u9aa4\u6267\u884c\u540e\uff0c\u90fd\u4f1a\u8f93\u51fa\u5b8c\u6574\u7684\u72b6\u6001\u4fe1\u606f\uff0c\u9002\u7528\u4e8e\u6bcf\u4e00\u6b65\u90fd\u8981\u83b7\u53d6\u5b8c\u6574\u72b6\u6001\u3001\u72b6\u6001\u6301\u4e45\u5316\u573a\u666f\u3002<\/p>\n\n\n\n<p>\u4ee3\u7801\u6848\u4f8b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain.agents import create_agent\nfrom langchain.tools import tool\nfrom typing import Dict, Any\n\nfrom init_llm import deepseek_llm\n\n\n@tool\ndef query_customer_data(customer_id: str) -&gt; Dict&#91;str, Any]:\n    \"\"\"\n    \u67e5\u8be2\u5ba2\u6237\u57fa\u672c\u4fe1\u606f\n    Args:\n        customer_id: \u5ba2\u6237ID\uff0c\u7528\u4e8e\u552f\u4e00\u6807\u8bc6\u5ba2\u6237\n    Returns:\n        \u5305\u542b\u5ba2\u6237\u57fa\u672c\u4fe1\u606f\u7684\u5b57\u5178\uff0c\u5982\u59d3\u540d\u3001\u7b49\u7ea7\u3001\u52a0\u5165\u65e5\u671f\u7b49\n    \"\"\"\n    # \u6a21\u62df\u6570\u636e\u5e93\u67e5\u8be2\n    return {\"name\": \"\u5f20\u4e09\",\"level\": \"VIP\",\"join_date\": \"2023-01-15\"}\n\n\n@tool\ndef check_order_history(customer_id: str) -&gt; Dict&#91;str, Any]:\n    \"\"\"\n    \u67e5\u8be2\u5ba2\u6237\u8ba2\u5355\u5386\u53f2\n    Args:\n        customer_id: \u5ba2\u6237ID\uff0c\u7528\u4e8e\u552f\u4e00\u6807\u8bc6\u5ba2\u6237\n    Returns:\n        \u5305\u542b\u5ba2\u6237\u8ba2\u5355\u5386\u53f2\u7684\u5b57\u5178\uff0c\u5982\u603b\u8ba2\u5355\u6570\u3001\u603b\u82b1\u8d39\u7b49\n    \"\"\"\n    return {\"total_orders\": 15,\"total_spent\": 25800.00}\n\n\n@tool\ndef get_current_promotions() -&gt; Dict&#91;str, Any]:\n    \"\"\"\n    \u83b7\u53d6\u5f53\u524d\u53ef\u7528\u4fc3\u9500\u6d3b\u52a8\n    Returns:\n        \u5305\u542b\u5f53\u524d\u53ef\u7528\u4fc3\u9500\u6d3b\u52a8\u7684\u5b57\u5178\uff0c\u5982\u6d3b\u52a8\u540d\u79f0\u3001\u6709\u6548\u65e5\u671f\u7b49\n    \"\"\"\n    return {\n        \"promotions\": &#91;\"\u8001\u7528\u6237\u4f18\u60e0\", \"\u4f1a\u5458\u4e13\u5c5e\u6298\u6263\"],\n        \"valid_until\": \"2027-01-31\"\n    }\n\n\n# \u521b\u5efa\u5ba2\u6237\u670d\u52a1Agent\ncustomer_service_agent = create_agent(\n    model=deepseek_llm,\n    tools=&#91;query_customer_data, check_order_history, get_current_promotions]\n)\n\n\nfor chunk in customer_service_agent.stream(\n        {\"messages\": &#91;{\"role\": \"user\",\"content\": \"\u67e5\u8be2\u5ba2\u6237ID\u4e3a CUST123456 \u7684\u5b8c\u6574\u4fe1\u606f\u548c\u53ef\u7528\u4f18\u60e0\"}]},\n        stream_mode=\"values\"\n):\n    print(chunk)\n    print(\"-\" * 50)<\/code><\/pre>\n\n\n\n<p>\u4ee3\u7801\u8fd0\u884c\u540e\u793a\u610f\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1840\" height=\"417\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-2eb26dc9-c046-4a44-a0ec-de664bf269fa.jpg\" alt=\"\" class=\"wp-image-105\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-2eb26dc9-c046-4a44-a0ec-de664bf269fa.jpg 1840w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-2eb26dc9-c046-4a44-a0ec-de664bf269fa-300x68.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-2eb26dc9-c046-4a44-a0ec-de664bf269fa-1024x232.jpg 1024w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-2eb26dc9-c046-4a44-a0ec-de664bf269fa-768x174.jpg 768w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-2eb26dc9-c046-4a44-a0ec-de664bf269fa-1536x348.jpg 1536w\" sizes=\"auto, (max-width: 1840px) 100vw, 1840px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>updates\u8f93\u51fa\u6a21\u5f0f<\/strong><\/h4>\n\n\n\n<p>\u8fd9\u79cd\u6a21\u5f0f\u5c31\u662f\u9ed8\u8ba4\u6a21\u5f0f\u3002\u8be5\u6a21\u5f0f\u4e2d\uff0c\u6bcf\u4e2a\u6b65\u9aa4\u6267\u884c\u540e\uff0c\u53ea\u589e\u91cf\u66f4\u65b0\u72b6\u6001\u4e2d\u53d1\u751f\u53d8\u5316\u7684\u5185\u5bb9\uff0c\u7528\u4e8e\u76d1\u63a7Agent \u6267\u884c\u8fdb\u5ea6\uff0c\u4f8b\u5982\u89c2\u5bdfAgent\u51b3\u5b9a\u8c03\u7528\u5de5\u5177\u3001\u5de5\u5177\u6267\u884c\u7ed3\u679c\u7b49\u6b65\u9aa4\u3002<\/p>\n\n\n\n<p>\u4ee3\u7801\u6848\u4f8b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u5176\u4ed6\u5de5\u5177\u4ee3\u7801\u540c\u4e0a\uff0c\u4fdd\u6301\u4e0d\u53d8\n... ...\nfor chunk in customer_service_agent.stream(\n        {\"messages\": &#91;{\"role\": \"user\",\"content\": \"\u67e5\u8be2\u5ba2\u6237ID\u4e3a CUST123456 \u7684\u5b8c\u6574\u4fe1\u606f\u548c\u53ef\u7528\u4f18\u60e0\"}]},\n        stream_mode=\"updates\"\n):\n    print(chunk)\n    print(\"-\" * 50)<\/code><\/pre>\n\n\n\n<p>\u4ee3\u7801\u8fd0\u884c\u540e\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1732\" height=\"440\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-c08c679c-b5fe-41f6-b1c9-8045ddc8cc6c.jpg\" alt=\"\" class=\"wp-image-109\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-c08c679c-b5fe-41f6-b1c9-8045ddc8cc6c.jpg 1732w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-c08c679c-b5fe-41f6-b1c9-8045ddc8cc6c-300x76.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-c08c679c-b5fe-41f6-b1c9-8045ddc8cc6c-1024x260.jpg 1024w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-c08c679c-b5fe-41f6-b1c9-8045ddc8cc6c-768x195.jpg 768w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-c08c679c-b5fe-41f6-b1c9-8045ddc8cc6c-1536x390.jpg 1536w\" sizes=\"auto, (max-width: 1732px) 100vw, 1732px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>messages\u8f93\u51fa\u6a21\u5f0f<\/strong><\/h4>\n\n\n\n<p>\u8be5\u6a21\u5f0f\u4e2d\u4f1a\u8f93\u51fa\u6d41\u5f0f\u8fd4\u56de\u7684Token\u4ee5\u53ca\u76f8\u5173\u7684\u5143\u6570\u636e\uff08\u5982\uff1a\u6765\u81ea\u54ea\u4e2a\u8282\u70b9\uff09\uff0c\u53ef\u4ee5\u7528\u5728\u5b9e\u73b0\u7c7b\u4f3c ChatGPT \u7684\u6253\u5b57\u673a\u6548\u679c\u573a\u666f\uff0c\u4e3a\u804a\u5929\u673a\u5668\u4eba\u7b49\u4ea4\u4e92\u5f0f\u5e94\u7528\u63d0\u4f9b\u6700\u4f73\u7684\u5b9e\u65f6\u4f53\u9a8c\u3002<\/p>\n\n\n\n<p>\u4ee3\u7801\u6848\u4f8b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u5176\u4ed6\u5de5\u5177\u4ee3\u7801\u540c\u4e0a\uff0c\u4fdd\u6301\u4e0d\u53d8\n... ...\n# \u521b\u5efa\u5ba2\u6237\u670d\u52a1Agent\ncustomer_service_agent = create_agent(\n    model=deepseek_llm,\n    tools=&#91;query_customer_data, check_order_history, get_current_promotions]\n)\n\n\nfor chunk in customer_service_agent.stream(\n        {\"messages\": &#91;{\"role\": \"user\",\"content\": \"\u67e5\u8be2\u5ba2\u6237ID\u4e3a CUST123456 \u7684\u5b8c\u6574\u4fe1\u606f\u548c\u53ef\u7528\u4f18\u60e0\"}]},\n        stream_mode=\"messages\"\n):\n    print(chunk)\n    print(\"-\" * 50)<\/code><\/pre>\n\n\n\n<p>\u4ee3\u7801\u8fd0\u884c\u540e\u7684\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1771\" height=\"598\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-0f2763ba-9113-43fd-9597-dfb76d10c507.jpg\" alt=\"\" class=\"wp-image-112\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-0f2763ba-9113-43fd-9597-dfb76d10c507.jpg 1771w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-0f2763ba-9113-43fd-9597-dfb76d10c507-300x101.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-0f2763ba-9113-43fd-9597-dfb76d10c507-1024x346.jpg 1024w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-0f2763ba-9113-43fd-9597-dfb76d10c507-768x259.jpg 768w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-0f2763ba-9113-43fd-9597-dfb76d10c507-1536x519.jpg 1536w\" sizes=\"auto, (max-width: 1771px) 100vw, 1771px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>tasks\u8f93\u51fa\u6a21\u5f0f<\/strong><\/h4>\n\n\n\n<p>\u8be5\u6a21\u5f0f\u4f1a\u8f93\u51fa\u5f53\u524dtask\u4efb\u52a1\u5f00\u59cb\u548c\u7ed3\u675f\u7684\u65f6\u95f4\uff0c\u5305\u542b\u4efb\u52a1\u7684\u7ed3\u679c\u548c\u9519\u8bef\u4fe1\u606f\uff0c\u8be5\u6a21\u5f0f\u7528\u4e8e\u76d1\u63a7\u4efb\u52a1\u7684\u751f\u547d\u5468\u671f\u3002<\/p>\n\n\n\n<p>\u4ee3\u7801\u6848\u4f8b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u5176\u4ed6\u5de5\u5177\u4ee3\u7801\u540c\u4e0a\uff0c\u4fdd\u6301\u4e0d\u53d8\n... ...\n# \u521b\u5efa\u5ba2\u6237\u670d\u52a1Agent\ncustomer_service_agent = create_agent(\n    model=deepseek_llm,\n    tools=&#91;query_customer_data, check_order_history, get_current_promotions]\n)\n\n\nfor chunk in customer_service_agent.stream(\n        {\"messages\": &#91;{\"role\": \"user\",\"content\": \"\u67e5\u8be2\u5ba2\u6237ID\u4e3a CUST123456 \u7684\u5b8c\u6574\u4fe1\u606f\u548c\u53ef\u7528\u4f18\u60e0\"}]},\n        stream_mode=\"tasks\"\n):\n    print(chunk)\n    print(\"-\" * 50)<\/code><\/pre>\n\n\n\n<p>\u4ee3\u7801\u8fd0\u884c\u540e\u7684\u7ed3\u679c\u5982\u4e0b:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1760\" height=\"805\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-0bc426c4-67ea-4b21-95de-6e259ef80b8e.jpg\" alt=\"\" class=\"wp-image-110\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-0bc426c4-67ea-4b21-95de-6e259ef80b8e.jpg 1760w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-0bc426c4-67ea-4b21-95de-6e259ef80b8e-300x137.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-0bc426c4-67ea-4b21-95de-6e259ef80b8e-1024x468.jpg 1024w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-0bc426c4-67ea-4b21-95de-6e259ef80b8e-768x351.jpg 768w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960127-0bc426c4-67ea-4b21-95de-6e259ef80b8e-1536x703.jpg 1536w\" sizes=\"auto, (max-width: 1760px) 100vw, 1760px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>debug\u8f93\u51fa\u6a21\u5f0f<\/strong><\/h4>\n\n\n\n<p>\u8be5\u6a21\u5f0f\u4e0etasks\u6a21\u5f0f\u7c7b\u4f3c\uff0c\u6bd4task\u6a21\u5f0f\u591a\u8f93\u51fa\u4efb\u52a1\u6b65\u9aa4\u3001\u65f6\u95f4\u6233\u3001task\u7c7b\u578b\uff08task\/task_result\uff09\uff0c\u8be5\u6a21\u5f0f\u7528\u4e8e\u8c03\u8bd5\u3001\u76d1\u63a7task\u4efb\u52a1\u7684\u751f\u547d\u5468\u671f\u3002<\/p>\n\n\n\n<p>\u4ee3\u7801\u6848\u4f8b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u5176\u4ed6\u5de5\u5177\u4ee3\u7801\u540c\u4e0a\uff0c\u4fdd\u6301\u4e0d\u53d8\n... ...\n# \u521b\u5efa\u5ba2\u6237\u670d\u52a1Agent\ncustomer_service_agent = create_agent(\n    model=deepseek_llm,\n    tools=&#91;query_customer_data, check_order_history, get_current_promotions]\n)\n\n\nfor chunk in customer_service_agent.stream(\n        {\"messages\": &#91;{\"role\": \"user\",\"content\": \"\u67e5\u8be2\u5ba2\u6237ID\u4e3a CUST123456 \u7684\u5b8c\u6574\u4fe1\u606f\u548c\u53ef\u7528\u4f18\u60e0\"}]},\n        stream_mode=\"debug\"\n):\n    print(chunk)\n    print(\"-\" * 50)<\/code><\/pre>\n\n\n\n<p>\u4ee3\u7801\u8fd0\u884c\u540e\u7684\u7ed3\u679c\u5982\u4e0b:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1801\" height=\"664\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-a6c413e5-1d7b-447a-a279-e70da9b54e36.jpg\" alt=\"\" class=\"wp-image-114\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-a6c413e5-1d7b-447a-a279-e70da9b54e36.jpg 1801w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-a6c413e5-1d7b-447a-a279-e70da9b54e36-300x111.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-a6c413e5-1d7b-447a-a279-e70da9b54e36-1024x378.jpg 1024w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-a6c413e5-1d7b-447a-a279-e70da9b54e36-768x283.jpg 768w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-a6c413e5-1d7b-447a-a279-e70da9b54e36-1536x566.jpg 1536w\" sizes=\"auto, (max-width: 1801px) 100vw, 1801px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>checkpoints\u8f93\u51fa\u6a21\u5f0f<\/strong><\/h4>\n\n\n\n<p>\u8be5\u6a21\u5f0f\u4e2d\uff0c\u6bcf\u5f53\u68c0\u67e5\u70b9\uff08checkpoint\uff09\u88ab\u521b\u5efa\u65f6\u4f1a\u89e6\u53d1\u8f93\u51fa\uff0c\u8f93\u51fa\u5305\u542b\u68c0\u67e5\u70b9\u4e2d\u7684\u72b6\u6001\uff0c\u7528\u4e8e\u9700\u8981\u72b6\u6001\u6301\u4e45\u5316\u3001\u5de5\u4f5c\u6d41\u6062\u590d\u6216\u5206\u5e03\u5f0f\u6267\u884c\u8ddf\u8e2a\u7684\u9ad8\u7ea7\u573a\u666f\u3002<\/p>\n\n\n\n<p>\u4ee3\u7801\u6848\u4f8b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u5176\u4ed6\u5de5\u5177\u4ee3\u7801\u540c\u4e0a\uff0c\u4fdd\u6301\u4e0d\u53d8\n... ...\n# 1. \u521b\u5efa\u5185\u5b58\u68c0\u67e5\u70b9\u5b58\u50a8\ncheckpointer = InMemorySaver()\n\n# 2. \u521b\u5efaAgent\nagent = create_agent(\n    model=deepseek_llm,\n    tools=&#91;query_customer_data, check_order_history, get_current_promotions],\n    checkpointer=checkpointer  # \u542f\u7528\u68c0\u67e5\u70b9\n)\n\n# 3. \u521b\u5efa\u552f\u4e00\u7684\u4f1a\u8bddID\nconfig = {\"configurable\": {\"thread_id\": \"session01\"}}\n\n# 4. \u8c03\u7528Agent\ncheckpoint_count = 0\n\n# \u4f7f\u7528checkpoints\u6a21\u5f0f\u8fdb\u884c\u6d41\u5f0f\u76d1\u63a7\nfor chunk in agent.stream(\n        {\"messages\": &#91;{\"role\": \"user\",\"content\": \"\u67e5\u8be2\u5ba2\u6237ID\u4e3a CUST123456 \u7684\u5b8c\u6574\u4fe1\u606f\u548c\u53ef\u7528\u4f18\u60e0\"}]},\n        config=config,\n        stream_mode=\"checkpoints\"\n):\n    checkpoint_count += 1\n    print(f\"\u68c0\u67e5\u70b9 #{checkpoint_count}\")\n    print(chunk)\n    print(\"-\" * 50)<\/code><\/pre>\n\n\n\n<p>\u4ee3\u7801\u8fd0\u884c\u540e\u793a\u4f8b\u7ed3\u679c\u5982\u4e0b\uff0c\u6bcf\u6b21\u8f93\u51fa\u90fd\u4f1a\u5c06\u76f8\u5173MESSAGE\u8ffd\u52a0\u5230values.messages\u4e2d\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1742\" height=\"912\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-cec8c4d4-c28b-4344-81d5-65b0b1921fee.jpg\" alt=\"\" class=\"wp-image-113\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-cec8c4d4-c28b-4344-81d5-65b0b1921fee.jpg 1742w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-cec8c4d4-c28b-4344-81d5-65b0b1921fee-300x157.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-cec8c4d4-c28b-4344-81d5-65b0b1921fee-1024x536.jpg 1024w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-cec8c4d4-c28b-4344-81d5-65b0b1921fee-768x402.jpg 768w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-cec8c4d4-c28b-4344-81d5-65b0b1921fee-1536x804.jpg 1536w\" sizes=\"auto, (max-width: 1742px) 100vw, 1742px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>custom\u8f93\u51fa\u6a21\u5f0f<\/strong><\/h4>\n\n\n\n<p>\u5f00\u53d1\u8005\u901a\u8fc7get_stream_writer\u5728\u5de5\u5177\u6216\u8282\u70b9\u5185\u90e8\u81ea\u5b9a\u4e49\u53d1\u9001\u7684\u6570\u636e\uff0c\u7528\u4e8e\u8f93\u51fa\u4e1a\u52a1\u903b\u8f91\u76f8\u5173\u7684\u8fdb\u5ea6\u4fe1\u606f\uff08\u5982\u201c\u5df2\u5904\u740610\/100\u6761\u8bb0\u5f55\u201d\uff09\u3001\u81ea\u5b9a\u4e49\u65e5\u5fd7\u6216\u6307\u6807\u3002<\/p>\n\n\n\n<p>\u6848\u4f8b:\u751f\u6210\u9500\u552e\u62a5\u544a\u548c\u5e93\u5b58\u62a5\u544aAgent\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain.agents import create_agent\nfrom langgraph.config import get_stream_writer\nfrom langchain.tools import tool\nimport time\n\nfrom init_llm import deepseek_llm\n\n\n@tool\ndef generate_sales_report() -&gt; str:\n    \"\"\"\u751f\u6210\u9500\u552e\u62a5\u544a\"\"\"\n    writer = get_stream_writer()\n\n    writer({\"type\": \"\u751f\u6210\u9500\u552e\u62a5\u544a\", \"message\": \"\u5f00\u59cb\u751f\u6210\u9500\u552e\u62a5\u544a\"})\n\n    # \u6a21\u62df\u6570\u636e\u5904\u7406\n    for i in range(1, 4):\n        time.sleep(0.5)\n        writer({\"type\": \"\u751f\u6210\u9500\u552e\u62a5\u544a\",\"message\": f\"\u751f\u6210\u9500\u552e\u62a5\u544a\u8fdb\u5ea6\u767e\u5206\u6bd4\uff1a{i * 25}%\"})\n\n    writer({\"type\": \"\u751f\u6210\u9500\u552e\u62a5\u544a\", \"message\": \"\u62a5\u544a\u751f\u6210\u5b8c\u6210\"})\n\n    return f\"\u9500\u552e\u62a5\u544a\uff1a\u603b\u6536\u5165150\u4e07\u5143\uff0c\u540c\u6bd4\u589e\u957f12%\"\n\n\n@tool\ndef generate_inventory_report() -&gt; str:\n    \"\"\"\u751f\u6210\u5e93\u5b58\u62a5\u544a\"\"\"\n    writer = get_stream_writer()\n    writer(\"\u5f00\u59cb\u5e93\u5b58\u5206\u6790...\")\n    time.sleep(0.5)\n    writer(\"\u68c0\u67e5\u5f53\u524d\u5e93\u5b58\u91cf...\")\n    time.sleep(0.5)\n    writer(\"\u751f\u6210\u5e93\u5b58\u62a5\u544a...\")\n\n    return \"\u5f53\u524d\u5e93\u5b58\u91cf\u4e3a10000\u4ef6\uff0c\u5e93\u5b58\u5145\u8db3\uff0c\u65e0\u5f02\u5e38\"\n\n\n# \u521b\u5efa\u62a5\u544a\u751f\u6210\u4ee3\u7406\nreporting_agent = create_agent(\n    model=deepseek_llm,\n    tools=&#91;generate_sales_report, generate_inventory_report]\n)\n\nfor chunk in reporting_agent.stream(\n        {\"messages\": &#91;{\"role\": \"user\",\"content\": \"\u751f\u6210\u9500\u552e\u62a5\u544a\u548c\u5e93\u5b58\u62a5\u544a\"}]},\n        stream_mode=\"custom\"\n):\n    print(chunk)\n    print(\"-\" * 50)<\/code><\/pre>\n\n\n\n<p>\u4ee3\u7801\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{'type': '\u751f\u6210\u9500\u552e\u62a5\u544a', 'message': '\u5f00\u59cb\u751f\u6210\u9500\u552e\u62a5\u544a'}\n--------------------------------------------------\n\u5f00\u59cb\u5e93\u5b58\u5206\u6790...\n--------------------------------------------------\n{'type': '\u751f\u6210\u9500\u552e\u62a5\u544a', 'message': '\u751f\u6210\u9500\u552e\u62a5\u544a\u8fdb\u5ea6\u767e\u5206\u6bd4\uff1a25%'}\n--------------------------------------------------\n\u68c0\u67e5\u5f53\u524d\u5e93\u5b58\u91cf...\n--------------------------------------------------\n{'type': '\u751f\u6210\u9500\u552e\u62a5\u544a', 'message': '\u751f\u6210\u9500\u552e\u62a5\u544a\u8fdb\u5ea6\u767e\u5206\u6bd4\uff1a50%'}\n--------------------------------------------------\n\u751f\u6210\u5e93\u5b58\u62a5\u544a...\n--------------------------------------------------\n{'type': '\u751f\u6210\u9500\u552e\u62a5\u544a', 'message': '\u751f\u6210\u9500\u552e\u62a5\u544a\u8fdb\u5ea6\u767e\u5206\u6bd4\uff1a75%'}\n--------------------------------------------------\n{'type': '\u751f\u6210\u9500\u552e\u62a5\u544a', 'message': '\u62a5\u544a\u751f\u6210\u5b8c\u6210'}\n--------------------------------------------------<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u6d41\u5f0f\u8f93\u51fa\u6a21\u5f0f\u603b\u7ed3<\/strong><\/h3>\n\n\n\n<p>\u5982\u4e0b\u662fLangChain Agent\u8f93\u51fa\u6a21\u5f0f\u5bf9\u6bd4\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">\u6a21\u5f0f<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u8f93\u51fa\u5185\u5bb9<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u4f7f\u7528\u573a\u666f<\/td><\/tr><tr><td>values<\/td><td>\u6bcf\u4e2a\u6b65\u9aa4\u6267\u884c\u540e\uff0c\u90fd\u4f1a\u8f93\u51fa\u5b8c\u6574\u7684\u72b6\u6001\u4fe1\u606f<\/td><td>\u9002\u7528\u4e8e\u6bcf\u4e00\u6b65\u90fd\u8981\u83b7\u53d6\u5b8c\u6574\u72b6\u6001\u3001\u72b6\u6001\u6301\u4e45\u5316\u573a\u666f<\/td><\/tr><tr><td>updates\uff08\u9ed8\u8ba4\uff09<\/td><td>\u6bcf\u4e2a\u6b65\u9aa4\u6267\u884c\u540e\uff0c\u53ea\u589e\u91cf\u66f4\u65b0\u72b6\u6001\u4e2d\u53d1\u751f\u53d8\u5316\u7684\u5185\u5bb9<\/td><td>\u7528\u4e8e\u76d1\u63a7Agent \u6267\u884c\u8fdb\u5ea6\uff0c\u4f8b\u5982\u89c2\u5bdfAgent\u51b3\u5b9a\u8c03\u7528\u5de5\u5177\u3001\u5de5\u5177\u6267\u884c\u7ed3\u679c\u7b49\u6b65\u9aa4<\/td><\/tr><tr><td>messages<\/td><td>\u8f93\u51fa\u6d41\u5f0f\u8fd4\u56de\u7684Token\u4ee5\u53ca\u76f8\u5173\u7684\u5143\u6570\u636e\uff08\u5982\uff1a\u6765\u81ea\u54ea\u4e2a\u8282\u70b9model\/tool\uff09<\/td><td>\u5b9e\u73b0\u7c7b\u4f3cChatGPT \u7684\u6253\u5b57\u673a\u6548\u679c\uff0c\u4e3a\u804a\u5929\u673a\u5668\u4eba\u7b49\u4ea4\u4e92\u5f0f\u5e94\u7528\u63d0\u4f9b\u6700\u4f73\u7684\u5b9e\u65f6\u4f53\u9a8c<\/td><\/tr><tr><td>tasks<\/td><td>\u8f93\u51fa\u5f53\u524dtask\u4efb\u52a1\u5f00\u59cb\u548c\u7ed3\u675f\u7684\u65f6\u95f4\uff0c\u5305\u542b\u4efb\u52a1\u7684\u7ed3\u679c\u548c\u9519\u8bef\u4fe1\u606f<\/td><td>\u8be5\u6a21\u5f0f\u7528\u4e8e\u76d1\u63a7\u4efb\u52a1\u7684\u751f\u547d\u5468\u671f<\/td><\/tr><tr><td>debug<\/td><td>\u4e0etasks\u6a21\u5f0f\u7c7b\u4f3c\uff0c\u6bd4task\u6a21\u5f0f\u591a\u8f93\u51fa\u4efb\u52a1\u6b65\u9aa4\u3001\u65f6\u95f4\u6233\u3001task\u7c7b\u578b\uff08task\/task_result\uff09<\/td><td>\u8be5\u6a21\u5f0f\u7528\u4e8e\u8c03\u8bd5\u3001\u76d1\u63a7task\u4efb\u52a1\u7684\u751f\u547d\u5468\u671f<\/td><\/tr><tr><td>checkpoints<\/td><td>\u5f53\u68c0\u67e5\u70b9\uff08checkpoint\uff09\u88ab\u521b\u5efa\u65f6\u4f1a\u89e6\u53d1\u8f93\u51fa\uff0c\u8f93\u51fa\u5305\u542b\u68c0\u67e5\u70b9\u4e2d\u7684\u72b6\u6001<\/td><td>\u7528\u4e8e\u9700\u8981\u72b6\u6001\u6301\u4e45\u5316\u3001\u5de5\u4f5c\u6d41\u6062\u590d\u6216\u5206\u5e03\u5f0f\u6267\u884c\u8ddf\u8e2a\u7684\u9ad8\u7ea7\u573a\u666f<\/td><\/tr><tr><td>custom<\/td><td>\u901a\u8fc7get_stream_writer\u5728\u5de5\u5177\u6216\u8282\u70b9\u5185\u90e8\u81ea\u5b9a\u4e49\u53d1\u9001\u7684\u6570\u636e<\/td><td>\u7528\u4e8e\u8f93\u51fa\u4e1a\u52a1\u903b\u8f91\u76f8\u5173\u7684\u8fdb\u5ea6\u4fe1\u606f\uff08\u5982\u201c\u5df2\u5904\u740610\/100\u6761\u8bb0\u5f55\u201d\uff09\u3001\u81ea\u5b9a\u4e49\u65e5\u5fd7\u6216\u6307\u6807<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u4e0d\u540c\u7684\u76ee\u6807\u6765\u9009\u62e9\u4e0d\u540c\u7684\u8f93\u51fa\u6a21\u5f0f\uff0c\u4f8b\u5982\uff1a\u5b9e\u73b0\u5b9e\u65f6\u5bf9\u8bdd\u4ea4\u4e92\uff0c\u4f18\u5148\u9009\u62e9message\u6a21\u5f0f\uff1b\u89c2\u5bdfAgent\u7684\u601d\u8003\u4e0e\u6267\u884c\u6b65\u9aa4\uff0c\u4f18\u5148\u9009\u62e9update\u6a21\u5f0f\uff1b\u9700\u8981\u67e5\u770b\u6bcf\u4e00\u6b65\u72b6\u6001\u4f18\u5148\u9009\u62e9values\/tasks\/debug\u6a21\u5f0f\uff1b\u5728\u5de5\u5177\u6267\u884c\u65f6\u8f93\u51fa\u81ea\u5b9a\u4e49\u4e1a\u52a1\u65e5\u5fd7\u4f18\u5148\u9009\u62e9custom\u6a21\u5f0f\u3002<\/p>\n\n\n\n<p>\u6b64\u5916\uff0c\u4ee5\u4e0a\u8fd9\u4e9b\u6a21\u5f0f\u8fd8\u53ef\u4ee5\u7ec4\u5408\u4f7f\u7528\uff0c\u4f8b\u5982\uff0c\u53ef\u4ee5\u540c\u65f6\u6307\u5b9astream_mode=[\u201ctasks\u201d\uff0c\u201cupdates\u201d],\u8fd9\u6837\u5728\u540c\u4e00\u4e2a\u5faa\u73af\u91cc\u65e2\u80fd\u67e5\u770bAgent task\u4efb\u52a1\u6267\u884c\u5185\u5bb9\uff0c\u53c8\u80fd\u663e\u793aAgent\u6bcf\u6b65\u7684\u66f4\u65b0\u3002<\/p>\n\n\n\n<p>\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u5176\u4ed6\u5de5\u5177\u4ee3\u7801\u540c\u4e0a\uff0c\u4fdd\u6301\u4e0d\u53d8\n... ...\n# \u521b\u5efa\u5ba2\u6237\u670d\u52a1Agent\ncustomer_service_agent = create_agent(\n    model=deepseek_llm,\n    tools=&#91;query_customer_data, check_order_history, get_current_promotions]\n)\n\n\nfor stream_mode, chunk in customer_service_agent.stream(\n        {\"messages\": &#91;{\"role\": \"user\",\"content\": \"\u67e5\u8be2\u5ba2\u6237ID\u4e3a CUST123456 \u7684\u5b8c\u6574\u4fe1\u606f\u548c\u53ef\u7528\u4f18\u60e0\"}]},\n        stream_mode=&#91;\"tasks\", \"updates\"]\n):\n    print(f\"\u5f53\u524d\u6d41\u6a21\u5f0f: {stream_mode}, \u5f53\u524d\u6570\u636e: {chunk}\")\n    print(\"-\" * 50)<\/code><\/pre>\n\n\n\n<p>\u5f53\u6307\u5b9a\u591a\u6a21\u5f0f\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7\u201cfor stream_mode, chunk in customer_service_agent.stream...\u201d\u6765\u904d\u5386dict\uff0cdict\u7684key(stream_mode)\u662f\u6267\u884c\u6a21\u5f0f\uff0cvalue(chunk)\u662f\u8be5\u6a21\u5f0f\u8f93\u51fa\u7684\u7ed3\u679c\u3002\u4ee3\u7801\u8fd0\u884c\u8f93\u51fa\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1665\" height=\"605\" src=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-61c71948-3b38-41d0-9c20-07e4985b62b2.jpg\" alt=\"\" class=\"wp-image-111\" srcset=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-61c71948-3b38-41d0-9c20-07e4985b62b2.jpg 1665w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-61c71948-3b38-41d0-9c20-07e4985b62b2-300x109.jpg 300w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-61c71948-3b38-41d0-9c20-07e4985b62b2-1024x372.jpg 1024w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-61c71948-3b38-41d0-9c20-07e4985b62b2-768x279.jpg 768w, https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960128-61c71948-3b38-41d0-9c20-07e4985b62b2-1536x558.jpg 1536w\" sizes=\"auto, (max-width: 1665px) 100vw, 1665px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Agent\u4ecb\u7ecd \u4ec0\u4e48\u662fAgent Agent\uff08\u667a\u80fd\u4f53\uff09\u7684\u6838\u5fc3\u5b9a\u4e49\u662f\uff1a\u80fd\u591f\u81ea\u4e3b\u611f\u77e5\u73af\u5883\u3001\u505a\u51fa\u51b3\u7b56\u3001\u6267\u884c\u884c\u52a8\uff0c\u4ee5\u5b8c\u6210\u7279\u5b9a\u76ee\u6807\u7684\u7a0b\u5e8f \/ &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-94","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Agent\u5b66\u4e60\u7b14\u8bb0\uff08Langchain\uff09 - Sunsyblog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sunsyblog.cn\/index.php\/2026\/03\/08\/agent\u5b66\u4e60\u7b14\u8bb0\uff08langchain\uff09\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Agent\u5b66\u4e60\u7b14\u8bb0\uff08Langchain\uff09 - Sunsyblog\" \/>\n<meta property=\"og:description\" content=\"Agent\u4ecb\u7ecd \u4ec0\u4e48\u662fAgent Agent\uff08\u667a\u80fd\u4f53\uff09\u7684\u6838\u5fc3\u5b9a\u4e49\u662f\uff1a\u80fd\u591f\u81ea\u4e3b\u611f\u77e5\u73af\u5883\u3001\u505a\u51fa\u51b3\u7b56\u3001\u6267\u884c\u884c\u52a8\uff0c\u4ee5\u5b8c\u6210\u7279\u5b9a\u76ee\u6807\u7684\u7a0b\u5e8f \/ ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sunsyblog.cn\/index.php\/2026\/03\/08\/agent\u5b66\u4e60\u7b14\u8bb0\uff08langchain\uff09\/\" \/>\n<meta property=\"og:site_name\" content=\"Sunsyblog\" \/>\n<meta property=\"article:published_time\" content=\"2026-03-08T08:55:36+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-08T08:55:39+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/sunsyblog.cn\/wp-content\/uploads\/2026\/03\/1772960122-3e432f49-4a9f-4a04-a537-277b7bbc46ce.jpg\" \/>\n\t<meta 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