{"id":102540,"date":"2026-09-09T06:41:25","date_gmt":"2026-09-08T22:41:25","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/102540.html"},"modified":"2026-09-09T06:41:25","modified_gmt":"2026-09-08T22:41:25","slug":"langgraph-%e7%8a%b6%e6%80%81%e7%ae%a1%e7%90%86%e8%bf%9b%e9%98%b6%ef%bc%9aoverwrite%e3%80%81%e8%be%93%e5%85%a5%e8%be%93%e5%87%ba%e6%a8%a1%e5%bc%8f%e4%b8%8e%e7%a7%81%e6%9c%89%e7%8a%b6%e6%80%81%ef%bc%81","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/102540.html","title":{"rendered":"LangGraph \u72b6\u6001\u7ba1\u7406\u8fdb\u9636\uff1aOverwrite\u3001\u8f93\u5165\u8f93\u51fa\u6a21\u5f0f\u4e0e\u79c1\u6709\u72b6\u6001\uff01"},"content":{"rendered":"<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\n<ul>\n<li>\u5148\u8bf4\u7ed3\u8bba<\/li>\n<li>5.1 \u4f7f\u7528 Overwrite \u7ed5\u8fc7 reducer<\/li>\n<li>\n<ul>\n<li>\u4e3a\u4ec0\u4e48\u9700\u8981 Overwrite<\/li>\n<li>\u4ee3\u7801\u793a\u4f8b<\/li>\n<li>\u8fd0\u884c\u7ed3\u679c\u8bf4\u660e<\/li>\n<li>\u9002\u7528\u573a\u666f<\/li>\n<li>\u5b9e\u6218\u63d0\u9192<\/li>\n<\/ul>\n<\/li>\n<li>5.2 \u4f7f\u7528\u72ec\u7acb\u7684\u8f93\u5165 \/ \u8f93\u51fa\u6a21\u5f0f<\/li>\n<li>\n<ul>\n<li>\u4e3a\u4ec0\u4e48\u8981\u533a\u5206\u8f93\u5165\u3001\u8f93\u51fa\u548c\u5185\u90e8\u72b6\u6001<\/li>\n<li>\u53c2\u6570\u542b\u4e49<\/li>\n<li>\u4ee3\u7801\u793a\u4f8b<\/li>\n<li>\u7ed3\u679c\u8bf4\u660e<\/li>\n<li>\u8fd9\u4e2a\u8bbe\u8ba1\u7684\u4ef7\u503c<\/li>\n<li>\u5b9e\u6218\u5efa\u8bae<\/li>\n<\/ul>\n<\/li>\n<li>5.3 \u5728\u8282\u70b9\u95f4\u4f20\u9012\u79c1\u6709\u72b6\u6001<\/li>\n<li>\n<ul>\n<li>\u4e00\u4e2a\u5178\u578b\u4f8b\u5b50<\/li>\n<li>\u4ee3\u7801\u793a\u4f8b<\/li>\n<li>\u4e00\u6b21\u6267\u884c\u540e&#xff0c;\u4f60\u4f1a\u770b\u5230\u4ec0\u4e48<\/li>\n<li>\u8fd9\u79cd\u8bbe\u8ba1\u9002\u5408\u4ec0\u4e48\u573a\u666f<\/li>\n<li>\u8fd9\u91cc\u6700\u5bb9\u6613\u8bef\u89e3\u7684\u4e00\u70b9<\/li>\n<\/ul>\n<\/li>\n<li>\u4e09\u4e2a\u80fd\u529b\u653e\u5728\u4e00\u8d77&#xff0c;\u600e\u4e48\u7406\u89e3\u6700\u6e05\u695a<\/li>\n<li>\n<ul>\n<li>1. &#096;Overwrite&#096;<\/li>\n<li>2. &#096;input_schema&#096; \/ &#096;output_schema&#096; \/ &#096;state_schema&#096;<\/li>\n<li>3. \u8282\u70b9\u95f4\u79c1\u6709\u72b6\u6001<\/li>\n<\/ul>\n<\/li>\n<li>\u5b9e\u6218\u91cc\u600e\u4e48\u9009<\/li>\n<li>\n<ul>\n<li>\u573a\u666f 1&#xff1a;\u5b57\u6bb5\u9700\u8981\u7ee7\u7eed\u7d2f\u79ef<\/li>\n<li>\u573a\u666f 2&#xff1a;\u5b57\u6bb5\u9700\u8981\u6574\u6bb5\u66ff\u6362<\/li>\n<li>\u573a\u666f 3&#xff1a;\u5bf9\u5916\u63a5\u53e3\u548c\u5185\u90e8\u72b6\u6001\u4e0d\u4e00\u81f4<\/li>\n<li>\u573a\u666f 4&#xff1a;\u4e2d\u95f4\u654f\u611f\u6570\u636e\u53ea\u5141\u8bb8\u5c40\u90e8\u6d41\u8f6c<\/li>\n<\/ul>\n<\/li>\n<li>\u5e38\u89c1\u5751\u70b9<\/li>\n<li>\n<ul>\n<li>\u5751 1&#xff1a;\u4ee5\u4e3a\u6240\u6709\u72b6\u6001\u66f4\u65b0\u90fd\u5e94\u8be5\u8d70 append<\/li>\n<li>\u5751 2&#xff1a;\u628a\u5185\u90e8\u4e2d\u95f4\u5b57\u6bb5\u76f4\u63a5\u66b4\u9732\u7ed9\u8f93\u51fa<\/li>\n<li>\u5751 3&#xff1a;\u628a\u201c\u6700\u7ec8\u4e0d\u8f93\u51fa\u201d\u548c\u201c\u8282\u70b9\u4e0d\u53ef\u89c1\u201d\u6df7\u4e3a\u4e00\u8c08<\/li>\n<li>\u5751 4&#xff1a;\u72b6\u6001\u8bbe\u8ba1\u8fc7\u65e9\u8d2a\u5927<\/li>\n<\/ul>\n<\/li>\n<li>\u603b\u7ed3<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908224123-6aa08f13c3426.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u8fd9\u4e00\u7bc7\u4e13\u95e8\u8bb2 LangGraph \u91cc\u4e09\u4e2a\u5f88\u5bb9\u6613\u88ab\u5ffd\u7565\u3001\u4f46\u4e00\u65e6\u505a\u590d\u6742\u5de5\u4f5c\u6d41\u5c31\u7ed5\u4e0d\u8fc7\u53bb\u7684\u80fd\u529b&#xff1a;Overwrite\u3001\u72ec\u7acb\u7684\u8f93\u5165\/\u8f93\u51fa\u6a21\u5f0f&#xff0c;\u4ee5\u53ca\u8282\u70b9\u95f4\u79c1\u6709\u72b6\u6001\u4f20\u9012\u3002<\/p>\n<hr \/>\n<h3>\u5148\u8bf4\u7ed3\u8bba<\/h3>\n<p>\u5982\u679c\u5df2\u7ecf\u4f1a\u5199\u6700\u57fa\u7840\u7684 StateGraph&#xff0c;\u63a5\u4e0b\u6765\u6700\u8be5\u8865\u7684\u4e0d\u662f\u66f4\u591a\u8282\u70b9&#xff0c;\u800c\u662f\u72b6\u6001\u7ba1\u7406\u80fd\u529b\u3002<\/p>\n<p>\u56e0\u4e3a\u771f\u5b9e\u9879\u76ee\u91cc&#xff0c;\u95ee\u9898\u901a\u5e38\u4e0d\u662f\u201c\u56fe\u4e0d\u4f1a\u8dd1\u201d&#xff0c;\u800c\u662f&#xff1a;<\/p>\n<ul>\n<li>\u67d0\u4e2a\u5b57\u6bb5\u5230\u5e95\u8be5\u8ffd\u52a0\u8fd8\u662f\u8986\u76d6&#xff1f;<\/li>\n<li>\u7528\u6237\u8f93\u5165\u3001\u5185\u90e8\u72b6\u6001\u3001\u6700\u7ec8\u8f93\u51fa\u80fd\u4e0d\u80fd\u5206\u5f00&#xff1f;<\/li>\n<li>\u4e2d\u95f4\u8282\u70b9\u7684\u654f\u611f\u6570\u636e&#xff0c;\u600e\u4e48\u5728\u8282\u70b9\u4e4b\u95f4\u4f20\u9012\u4f46\u4e0d\u66b4\u9732\u7ed9\u5916\u90e8&#xff1f;<\/li>\n<\/ul>\n<p>\u8fd9\u4e09\u4e2a\u95ee\u9898&#xff0c;\u521a\u597d\u5bf9\u5e94\u672c\u6587\u7684\u4e09\u4e2a\u4e3b\u9898&#xff1a;<\/p>\n<li>\u4f7f\u7528 Overwrite \u7ed5\u8fc7 reducer<\/li>\n<li>\u4f7f\u7528\u72ec\u7acb\u8f93\u5165\/\u8f93\u51fa\u6a21\u5f0f\u63a7\u5236\u56fe\u7684\u8fb9\u754c<\/li>\n<li>\u5728\u8282\u70b9\u4e4b\u95f4\u4f20\u9012\u79c1\u6709\u72b6\u6001<\/li>\n<hr \/>\n<h3>5.1 \u4f7f\u7528 Overwrite \u7ed5\u8fc7 reducer<\/h3>\n<p>\u5728 LangGraph \u4e2d&#xff0c;reducer \u7528\u6765\u63a7\u5236\u72b6\u6001\u66f4\u65b0\u7684\u5904\u7406\u65b9\u5f0f\u3002<\/p>\n<p>\u9ed8\u8ba4\u60c5\u51b5\u4e0b&#xff0c;\u6bcf\u4e2a\u72b6\u6001\u952e\u90fd\u53ef\u4ee5\u914d\u7f6e\u81ea\u5df1\u7684 reducer \u51fd\u6570&#xff0c;\u7528\u4e8e\u51b3\u5b9a\u591a\u4e2a\u8282\u70b9\u66f4\u65b0\u540c\u4e00\u4e2a\u5b57\u6bb5\u65f6\u5e94\u8be5\u5982\u4f55\u5408\u5e76\u3002<\/p>\n<p>\u6700\u5e38\u89c1\u7684\u4f8b\u5b50\u5c31\u662f\u6d88\u606f\u5217\u8868&#xff1a;<\/p>\n<ul>\n<li>\u6b63\u5e38\u5bf9\u8bdd\u65f6&#xff0c;\u65b0\u6d88\u606f\u901a\u5e38\u4f1a\u8ffd\u52a0\u5230 messages \u4e2d<\/li>\n<li>\u4f46\u67d0\u4e9b\u573a\u666f\u4e0b&#xff0c;\u6211\u4eec\u5e76\u4e0d\u60f3\u8ffd\u52a0&#xff0c;\u800c\u662f\u5e0c\u671b\u76f4\u63a5\u8986\u76d6\u65e7\u503c<\/li>\n<\/ul>\n<p>\u8fd9\u65f6\u5c31\u9700\u8981 Overwrite\u3002<\/p>\n<h4>\u4e3a\u4ec0\u4e48\u9700\u8981 Overwrite<\/h4>\n<p>\u53ef\u4ee5\u60f3\u8c61\u4e00\u4e2a\u804a\u5929\u7cfb\u7edf&#xff1a;<\/p>\n<ul>\n<li>\u5e73\u65f6\u7684\u6d88\u606f\u6d41\u8f6c&#xff0c;\u90fd\u662f\u4e0d\u65ad\u5f80\u6d88\u606f\u5217\u8868\u540e\u9762\u8ffd\u52a0\u5185\u5bb9<\/li>\n<li>\u4f46\u5982\u679c\u7528\u6237\u70b9\u51fb\u201c\u6e05\u7a7a\u4e0a\u4e0b\u6587\u5e76\u91cd\u65b0\u5f00\u59cb\u201d&#xff0c;\u8fd9\u65f6\u5c31\u4e0d\u5e94\u8be5\u7ee7\u7eed append<\/li>\n<li>\u4f60\u8981\u7684\u4e0d\u662f\u201c\u5408\u5e76\u201d&#xff0c;\u800c\u662f\u201c\u6574\u6bb5\u66ff\u6362\u201d<\/li>\n<\/ul>\n<p>\u4e5f\u5c31\u662f\u8bf4&#xff1a;<\/p>\n<ul>\n<li>reducer \u8d1f\u8d23\u201c\u600e\u4e48\u5408\u201d<\/li>\n<li>Overwrite \u8d1f\u8d23\u201c\u8fd9\u6b21\u522b\u5408\u4e86&#xff0c;\u76f4\u63a5\u66ff\u6362\u201d<\/li>\n<\/ul>\n<h4>\u4ee3\u7801\u793a\u4f8b<\/h4>\n<p><span class=\"token keyword\">from<\/span> langgraph<span class=\"token punctuation\">.<\/span>graph <span class=\"token keyword\">import<\/span> StateGraph<span class=\"token punctuation\">,<\/span> START<span class=\"token punctuation\">,<\/span> END<br \/>\n<span class=\"token keyword\">from<\/span> langgraph<span class=\"token punctuation\">.<\/span>types <span class=\"token keyword\">import<\/span> Overwrite<br \/>\n<span class=\"token keyword\">from<\/span> typing_extensions <span class=\"token keyword\">import<\/span> Annotated<span class=\"token punctuation\">,<\/span> TypedDict<br \/>\n<span class=\"token keyword\">import<\/span> operator<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">State<\/span><span class=\"token punctuation\">(<\/span>TypedDict<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    messages<span class=\"token punctuation\">:<\/span> Annotated<span class=\"token punctuation\">[<\/span><span class=\"token builtin\">list<\/span><span class=\"token punctuation\">,<\/span> operator<span class=\"token punctuation\">.<\/span>add<span class=\"token punctuation\">]<\/span><\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">add_message<\/span><span class=\"token punctuation\">(<\/span>state<span class=\"token punctuation\">:<\/span> State<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;messages&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;first message&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">replace_messages<\/span><span class=\"token punctuation\">(<\/span>state<span class=\"token punctuation\">:<\/span> State<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token comment\"># \u7ed5\u8fc7 reducer&#xff0c;\u76f4\u63a5\u66ff\u6362\u6574\u4e2a messages \u5217\u8868<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;messages&#034;<\/span><span class=\"token punctuation\">:<\/span> Overwrite<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;replacement message&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<p>builder <span class=\"token operator\">&#061;<\/span> StateGraph<span class=\"token punctuation\">(<\/span>State<span class=\"token punctuation\">)<\/span><br \/>\nbuilder<span class=\"token punctuation\">.<\/span>add_node<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;add_message&#034;<\/span><span class=\"token punctuation\">,<\/span> add_message<span class=\"token punctuation\">)<\/span><br \/>\nbuilder<span class=\"token punctuation\">.<\/span>add_node<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;replace_messages&#034;<\/span><span class=\"token punctuation\">,<\/span> replace_messages<span class=\"token punctuation\">)<\/span><\/p>\n<p>builder<span class=\"token punctuation\">.<\/span>add_edge<span class=\"token punctuation\">(<\/span>START<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;add_message&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\nbuilder<span class=\"token punctuation\">.<\/span>add_edge<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;add_message&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;replace_messages&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\nbuilder<span class=\"token punctuation\">.<\/span>add_edge<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;replace_messages&#034;<\/span><span class=\"token punctuation\">,<\/span> END<span class=\"token punctuation\">)<\/span><\/p>\n<p>graph <span class=\"token operator\">&#061;<\/span> builder<span class=\"token punctuation\">.<\/span><span class=\"token builtin\">compile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>result <span class=\"token operator\">&#061;<\/span> graph<span class=\"token punctuation\">.<\/span>invoke<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;messages&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<h4>\u8fd0\u884c\u7ed3\u679c\u8bf4\u660e<\/h4>\n<p>\u5982\u679c\u6ca1\u6709 Overwrite&#xff0c;\u6700\u7ec8\u7684 messages \u5f80\u5f80\u4f1a\u53d8\u6210&#xff1a;<\/p>\n<p><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;first message&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;replacement message&#034;<\/span><span class=\"token punctuation\">]<\/span><\/p>\n<p>\u4f46\u7528\u4e86 Overwrite \u4e4b\u540e&#xff0c;\u6700\u7ec8\u7ed3\u679c\u4f1a\u53d8\u6210&#xff1a;<\/p>\n<p><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;replacement message&#034;<\/span><span class=\"token punctuation\">]<\/span><\/p>\n<p>\u4e5f\u5c31\u662f\u76f4\u63a5\u8986\u76d6\u539f\u72b6\u6001&#xff0c;\u800c\u4e0d\u662f\u8d70 operator.add \u7684\u8ffd\u52a0\u903b\u8f91\u3002<\/p>\n<h4>\u9002\u7528\u573a\u666f<\/h4>\n<ul>\n<li>\u6e05\u7a7a\u804a\u5929\u8bb0\u5f55\u5e76\u91cd\u65b0\u5f00\u59cb<\/li>\n<li>\u91cd\u7f6e\u5de5\u4f5c\u6d41\u4e0a\u4e0b\u6587<\/li>\n<li>\u8986\u76d6\u7f13\u5b58\u5b57\u6bb5<\/li>\n<li>\u91cd\u65b0\u751f\u6210\u67d0\u4e00\u6bb5\u4e2d\u95f4\u7ed3\u679c<\/li>\n<li>\u5f02\u5e38\u6062\u590d\u65f6\u66ff\u6362\u9519\u8bef\u72b6\u6001<\/li>\n<\/ul>\n<h4>\u5b9e\u6218\u63d0\u9192<\/h4>\n<p>Overwrite \u5f88\u597d\u7528&#xff0c;\u4f46\u4e0d\u8981\u6ee5\u7528\u3002<\/p>\n<p>\u56e0\u4e3a\u4e00\u65e6\u4f7f\u7528\u8986\u76d6\u8bed\u4e49&#xff0c;\u610f\u5473\u7740\u4f60\u8df3\u8fc7\u4e86\u539f\u672c\u7684\u72b6\u6001\u5408\u5e76\u89c4\u5219\u3002\u9002\u5408\u201c\u660e\u786e\u8981\u91cd\u7f6e\u201d\u7684\u573a\u666f&#xff0c;\u4e0d\u9002\u5408\u65e5\u5e38\u72b6\u6001\u6d41\u8f6c\u3002<\/p>\n<p>\u4e00\u53e5\u8bdd\u603b\u7ed3&#xff1a;<\/p>\n<p>\u9ed8\u8ba4\u7528 reducer \u5408\u5e76&#xff0c;\u53ea\u6709\u5728\u786e\u5b9e\u8981\u201c\u6574\u6bb5\u66ff\u6362\u201d\u65f6\u518d\u7528 Overwrite\u3002<\/p>\n<hr \/>\n<h3>5.2 \u4f7f\u7528\u72ec\u7acb\u7684\u8f93\u5165 \/ \u8f93\u51fa\u6a21\u5f0f<\/h3>\n<p>\u9ed8\u8ba4\u60c5\u51b5\u4e0b&#xff0c;LangGraph \u4f7f\u7528\u5355\u4e00\u72b6\u6001\u6a21\u5f0f&#xff0c;\u4e5f\u5c31\u662f&#xff1a;<\/p>\n<ul>\n<li>\u8f93\u5165\u662f\u8fd9\u4efd\u72b6\u6001<\/li>\n<li>\u8282\u70b9\u5185\u90e8\u6d41\u8f6c\u662f\u8fd9\u4efd\u72b6\u6001<\/li>\n<li>\u6700\u7ec8\u8f93\u51fa\u8fd8\u662f\u8fd9\u4efd\u72b6\u6001<\/li>\n<\/ul>\n<p>\u8fd9\u5728\u5c0f Demo \u91cc\u5f88\u65b9\u4fbf&#xff0c;\u4f46\u771f\u5b9e\u4e1a\u52a1\u91cc\u5f80\u5f80\u4e0d\u591f\u4f18\u96c5\u3002<\/p>\n<p>\u56e0\u4e3a\u6211\u4eec\u901a\u5e38\u5e0c\u671b&#xff1a;<\/p>\n<ul>\n<li>\u8f93\u5165\u6a21\u5f0f&#xff1a;\u53ea\u66b4\u9732\u7528\u6237\u9700\u8981\u4f20\u5165\u7684\u5b57\u6bb5<\/li>\n<li>\u8f93\u51fa\u6a21\u5f0f&#xff1a;\u53ea\u8fd4\u56de\u7528\u6237\u771f\u6b63\u5173\u5fc3\u7684\u7ed3\u679c<\/li>\n<li>\u5185\u90e8\u72b6\u6001&#xff1a;\u4fdd\u5b58\u8282\u70b9\u95f4\u6d41\u8f6c\u6240\u9700\u7684\u5b8c\u6574\u4fe1\u606f<\/li>\n<\/ul>\n<p>\u6362\u53e5\u8bdd\u8bf4&#xff0c;\u5185\u90e8\u72b6\u6001\u4e0d\u4e00\u5b9a\u5e94\u8be5\u5b8c\u5168\u66b4\u9732\u7ed9\u5916\u90e8\u3002<\/p>\n<h4>\u4e3a\u4ec0\u4e48\u8981\u533a\u5206\u8f93\u5165\u3001\u8f93\u51fa\u548c\u5185\u90e8\u72b6\u6001<\/h4>\n<p>\u4ee5\u4e00\u4e2a\u95ee\u7b54\u7cfb\u7edf\u4e3a\u4f8b&#xff1a;<\/p>\n<ul>\n<li>\u8f93\u5165&#xff1a;\u7528\u6237\u7684\u95ee\u9898 question<\/li>\n<li>\u8f93\u51fa&#xff1a;\u6a21\u578b\u7b54\u6848 answer<\/li>\n<li>\u5185\u90e8&#xff1a;\u53ef\u80fd\u8fd8\u4f1a\u6709 retrieved_docs\u3001tool_calls\u3001rewrite_count \u7b49\u4e2d\u95f4\u5b57\u6bb5<\/li>\n<\/ul>\n<p>\u8fd9\u4e9b\u5185\u90e8\u5b57\u6bb5\u5bf9\u7cfb\u7edf\u5f88\u91cd\u8981&#xff0c;\u4f46\u5bf9\u8c03\u7528\u65b9\u5e76\u4e0d\u53cb\u597d&#xff0c;\u4e5f\u6ca1\u5fc5\u8981\u90fd\u8fd4\u56de\u3002<\/p>\n<p>\u8fd9\u65f6\u5c31\u53ef\u4ee5\u4f7f\u7528 StateGraph \u7684\u8fd9\u51e0\u4e2a\u53c2\u6570&#xff1a;<\/p>\n<ul>\n<li>input_schema<\/li>\n<li>output_schema<\/li>\n<li>state_schema<\/li>\n<\/ul>\n<h4>\u53c2\u6570\u542b\u4e49<\/h4>\n<table>\n<tr>\u53c2\u6570\u540d\u4f5c\u7528<\/tr>\n<tbody>\n<tr>\n<td>input_schema<\/td>\n<td>\u5b9a\u4e49\u56fe\u63a5\u6536\u7684\u8f93\u5165\u7ed3\u6784<\/td>\n<\/tr>\n<tr>\n<td>output_schema<\/td>\n<td>\u5b9a\u4e49\u56fe\u6700\u7ec8\u8fd4\u56de\u7684\u8f93\u51fa\u7ed3\u6784<\/td>\n<\/tr>\n<tr>\n<td>state_schema<\/td>\n<td>\u5b9a\u4e49\u56fe\u5185\u90e8\u5b8c\u6574\u72b6\u6001\u7ed3\u6784<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>\u4ee3\u7801\u793a\u4f8b<\/h4>\n<p><span class=\"token keyword\">from<\/span> langgraph<span class=\"token punctuation\">.<\/span>graph <span class=\"token keyword\">import<\/span> StateGraph<span class=\"token punctuation\">,<\/span> START<span class=\"token punctuation\">,<\/span> END<br \/>\n<span class=\"token keyword\">from<\/span> typing_extensions <span class=\"token keyword\">import<\/span> TypedDict<\/p>\n<p><span class=\"token comment\"># 1. \u8f93\u5165\u6a21\u5f0f&#xff1a;\u53ea\u63a5\u6536 question<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">InputState<\/span><span class=\"token punctuation\">(<\/span>TypedDict<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    question<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">str<\/span><\/p>\n<p><span class=\"token comment\"># 2. \u8f93\u51fa\u6a21\u5f0f&#xff1a;\u53ea\u8fd4\u56de answer<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">OutputState<\/span><span class=\"token punctuation\">(<\/span>TypedDict<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    answer<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">str<\/span><\/p>\n<p><span class=\"token comment\"># 3. \u5185\u90e8\u5b8c\u6574\u72b6\u6001&#xff1a;\u540c\u65f6\u5305\u542b\u8f93\u5165\u548c\u8f93\u51fa<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">OverallState<\/span><span class=\"token punctuation\">(<\/span>InputState<span class=\"token punctuation\">,<\/span> OutputState<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">pass<\/span><\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">answer_node<\/span><span class=\"token punctuation\">(<\/span>state<span class=\"token punctuation\">:<\/span> InputState<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u7406\u89e3\u7528\u6237\u95ee\u9898\u5e76\u751f\u6210\u7b54\u6848&#034;&#034;&#034;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token string\">&#034;question&#034;<\/span><span class=\"token punctuation\">:<\/span> state<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;question&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;answer&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string-interpolation\"><span class=\"token string\">f&#034;Answer to: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>state<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;question&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>builder <span class=\"token operator\">&#061;<\/span> StateGraph<span class=\"token punctuation\">(<\/span><br \/>\n    OverallState<span class=\"token punctuation\">,<\/span><br \/>\n    input_schema<span class=\"token operator\">&#061;<\/span>InputState<span class=\"token punctuation\">,<\/span><br \/>\n    output_schema<span class=\"token operator\">&#061;<\/span>OutputState<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p>builder<span class=\"token punctuation\">.<\/span>add_node<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;answer_node&#034;<\/span><span class=\"token punctuation\">,<\/span> answer_node<span class=\"token punctuation\">)<\/span><br \/>\nbuilder<span class=\"token punctuation\">.<\/span>add_edge<span class=\"token punctuation\">(<\/span>START<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;answer_node&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\nbuilder<span class=\"token punctuation\">.<\/span>add_edge<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;answer_node&#034;<\/span><span class=\"token punctuation\">,<\/span> END<span class=\"token punctuation\">)<\/span><\/p>\n<p>graph <span class=\"token operator\">&#061;<\/span> builder<span class=\"token punctuation\">.<\/span><span class=\"token builtin\">compile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>result <span class=\"token operator\">&#061;<\/span> graph<span class=\"token punctuation\">.<\/span>invoke<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;question&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;What is LangGraph?&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<h4>\u7ed3\u679c\u8bf4\u660e<\/h4>\n<p>\u8f93\u51fa\u4f1a\u662f&#xff1a;<\/p>\n<p><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;answer&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;Answer to: What is LangGraph?&#034;<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6ce8\u610f\u4e00\u70b9&#xff1a;<\/p>\n<ul>\n<li>question \u867d\u7136\u5b58\u5728\u4e8e\u5185\u90e8\u72b6\u6001\u4e2d<\/li>\n<li>\u4f46\u56e0\u4e3a output_schema&#061;OutputState<\/li>\n<li>\u6240\u4ee5\u5b83\u4e0d\u4f1a\u51fa\u73b0\u5728\u6700\u7ec8\u8fd4\u56de\u7ed3\u679c\u91cc<\/li>\n<\/ul>\n<h4>\u8fd9\u4e2a\u8bbe\u8ba1\u7684\u4ef7\u503c<\/h4>\n<p>\u8fd9\u7c7b\u6a21\u5f0f\u5728\u5de5\u7a0b\u91cc\u975e\u5e38\u6709\u7528&#xff0c;\u5c24\u5176\u9002\u5408\u4e0b\u9762\u51e0\u7c7b\u573a\u666f&#xff1a;<\/p>\n<ul>\n<li>API \u5f00\u53d1&#xff1a;\u8f93\u5165\u8f93\u51fa\u5951\u7ea6\u6e05\u6670<\/li>\n<li>\u5fae\u670d\u52a1&#xff1a;\u907f\u514d\u5185\u90e8\u5b57\u6bb5\u76f4\u63a5\u5916\u6cc4<\/li>\n<li>\u6570\u636e\u7ba1\u9053&#xff1a;\u660e\u786e\u6bcf\u4e00\u6b65\u7684\u8fb9\u754c<\/li>\n<li>Agent \u7cfb\u7edf&#xff1a;\u5185\u90e8\u72b6\u6001\u53ef\u4ee5\u590d\u6742&#xff0c;\u5916\u90e8\u63a5\u53e3\u4fdd\u6301\u7b80\u6d01<\/li>\n<\/ul>\n<h4>\u5b9e\u6218\u5efa\u8bae<\/h4>\n<p>\u5982\u679c\u56fe\u5df2\u7ecf\u5f00\u59cb\u51fa\u73b0\u8fd9\u4e9b\u5b57\u6bb5&#xff1a;<\/p>\n<ul>\n<li>debug_info<\/li>\n<li>intermediate_result<\/li>\n<li>trace_id<\/li>\n<li>tool_result<\/li>\n<li>sensitive_data<\/li>\n<\/ul>\n<p>\u90a3\u5c31\u8bf4\u660e\u5f88\u53ef\u80fd\u5df2\u7ecf\u4e0d\u9002\u5408\u7ee7\u7eed\u7528\u201c\u5355\u4e00\u72b6\u6001\u6a21\u5f0f\u201d\u4e86\u3002<\/p>\n<p>\u8fd9\u4e2a\u65f6\u5019&#xff0c;\u5c3d\u5feb\u62c6\u51fa&#xff1a;<\/p>\n<ul>\n<li>\u5bf9\u5916\u8f93\u5165\u6a21\u5f0f<\/li>\n<li>\u5bf9\u5916\u8f93\u51fa\u6a21\u5f0f<\/li>\n<li>\u5185\u90e8\u5b8c\u6574\u72b6\u6001<\/li>\n<\/ul>\n<p>\u540e\u9762\u7ef4\u62a4\u6210\u672c\u4f1a\u4f4e\u5f88\u591a\u3002<\/p>\n<hr \/>\n<h3>5.3 \u5728\u8282\u70b9\u95f4\u4f20\u9012\u79c1\u6709\u72b6\u6001<\/h3>\n<p>\u5728\u590d\u6742\u56fe\u91cc&#xff0c;\u7ecf\u5e38\u4f1a\u6709\u4e00\u79cd\u9700\u6c42&#xff1a;<\/p>\n<ul>\n<li>\u67d0\u4e9b\u4e2d\u95f4\u6570\u636e\u5bf9\u540e\u7eed\u8282\u70b9\u5f88\u91cd\u8981<\/li>\n<li>\u4f46\u8fd9\u4e9b\u6570\u636e\u4e0d\u5e94\u8be5\u51fa\u73b0\u5728\u6700\u7ec8\u8f93\u51fa\u91cc<\/li>\n<li>\u751a\u81f3\u4e0d\u5e94\u8be5\u88ab\u6240\u6709\u8282\u70b9\u770b\u5230<\/li>\n<\/ul>\n<p>\u8fd9\u5c31\u662f\u201c\u79c1\u6709\u72b6\u6001\u201d\u7684\u95ee\u9898\u3002<\/p>\n<h4>\u4e00\u4e2a\u5178\u578b\u4f8b\u5b50<\/h4>\n<p>\u5047\u8bbe\u8981\u505a\u4e00\u4e2a\u62a5\u544a\u751f\u6210\u6d41\u7a0b&#xff1a;<\/p>\n<li>\u8282\u70b9 1&#xff1a;\u4ece\u6570\u636e\u5e93\u8bfb\u53d6\u539f\u59cb\u6570\u636e&#xff0c;\u5176\u4e2d\u5305\u542b\u654f\u611f\u4fe1\u606f<\/li>\n<li>\u8282\u70b9 2&#xff1a;\u6e05\u6d17\u548c\u8131\u654f\u8fd9\u4e9b\u6570\u636e<\/li>\n<li>\u8282\u70b9 3&#xff1a;\u57fa\u4e8e\u6e05\u6d17\u540e\u7684\u7ed3\u679c\u751f\u6210\u6700\u7ec8\u62a5\u544a<\/li>\n<p>\u8fd9\u91cc\u6709\u4e2a\u6838\u5fc3\u8981\u6c42&#xff1a;<\/p>\n<ul>\n<li>\u8282\u70b9 1 \u548c \u8282\u70b9 2 \u4e4b\u95f4\u9700\u8981\u5171\u4eab\u654f\u611f\u6570\u636e<\/li>\n<li>\u4f46 \u8282\u70b9 3 \u4e0d\u5e94\u8be5\u770b\u5230\u539f\u59cb\u654f\u611f\u6570\u636e<\/li>\n<li>\u6700\u7ec8\u8f93\u51fa\u66f4\u4e0d\u5e94\u8be5\u5305\u542b\u8fd9\u4e9b\u5185\u5bb9<\/li>\n<\/ul>\n<p>\u8fd9\u65f6\u5c31\u53ef\u4ee5\u901a\u8fc7\u8282\u70b9\u7279\u5b9a\u8f93\u5165 \/ \u8f93\u51fa\u7c7b\u578b\u6765\u5b9e\u73b0\u5c40\u90e8\u4f20\u9012\u3002<\/p>\n<h4>\u4ee3\u7801\u793a\u4f8b<\/h4>\n<p><span class=\"token keyword\">from<\/span> langgraph<span class=\"token punctuation\">.<\/span>graph <span class=\"token keyword\">import<\/span> StateGraph<span class=\"token punctuation\">,<\/span> START<span class=\"token punctuation\">,<\/span> END<br \/>\n<span class=\"token keyword\">from<\/span> typing_extensions <span class=\"token keyword\">import<\/span> TypedDict<\/p>\n<p><span class=\"token comment\"># \u516c\u5171\u72b6\u6001&#xff1a;\u6700\u7ec8\u5bf9\u5916\u53ef\u89c1<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">OverallState<\/span><span class=\"token punctuation\">(<\/span>TypedDict<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    final_result<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">str<\/span><\/p>\n<p><span class=\"token comment\"># \u8282\u70b91\u7684\u79c1\u6709\u8f93\u51fa<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Node1Output<\/span><span class=\"token punctuation\">(<\/span>TypedDict<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    sensitive_data<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">str<\/span><\/p>\n<p><span class=\"token comment\"># \u8282\u70b92\u9700\u8981\u7684\u8f93\u5165<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Node2Input<\/span><span class=\"token punctuation\">(<\/span>TypedDict<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    sensitive_data<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">str<\/span><\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">node_1<\/span><span class=\"token punctuation\">(<\/span>state<span class=\"token punctuation\">:<\/span> OverallState<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> Node1Output<span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u7b2c\u4e00\u6b65&#xff1a;\u83b7\u53d6\u5305\u542b\u654f\u611f\u4fe1\u606f\u7684\u539f\u59cb\u6570\u636e&#034;&#034;&#034;<\/span><br \/>\n    private_data <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u8fd9\u662f\u654f\u611f\u4fe1\u606f&#034;<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Node1: \u83b7\u53d6\u5230\u654f\u611f\u6570\u636e&#xff0c;\u4f46\u4e0d\u4f1a\u66b4\u9732\u7ed9\u6700\u7ec8\u8f93\u51fa&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;sensitive_data&#034;<\/span><span class=\"token punctuation\">:<\/span> private_data<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">node_2<\/span><span class=\"token punctuation\">(<\/span>state<span class=\"token punctuation\">:<\/span> Node2Input<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> OverallState<span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u7b2c\u4e8c\u6b65&#xff1a;\u5904\u7406\u654f\u611f\u6570\u636e&#xff0c;\u8f93\u51fa\u6e05\u6d17\u7ed3\u679c&#034;&#034;&#034;<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;Node2: \u6b63\u5728\u5904\u7406\u654f\u611f\u6570\u636e: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>state<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;sensitive_data&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;final_result&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;\u6e05\u7406\u540e\u7684\u5904\u7406\u7ed3\u679c&#034;<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">node_3<\/span><span class=\"token punctuation\">(<\/span>state<span class=\"token punctuation\">:<\/span> OverallState<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> OverallState<span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u7b2c\u4e09\u6b65&#xff1a;\u53ea\u6d88\u8d39\u516c\u5f00\u7ed3\u679c&#xff0c;\u4e0d\u63a5\u89e6\u654f\u611f\u4fe1\u606f&#034;&#034;&#034;<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;Node3: \u53ea\u770b\u5230\u6700\u7ec8\u7ed3\u679c: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>state<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;final_result&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;final_result&#034;<\/span><span class=\"token punctuation\">:<\/span> state<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;final_result&#034;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034; &#8211; \u5b8c\u6210&#034;<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<p>builder <span class=\"token operator\">&#061;<\/span> StateGraph<span class=\"token punctuation\">(<\/span>OverallState<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u8fd9\u91cc\u987a\u5e8f\u6267\u884c\u4e09\u4e2a\u8282\u70b9<\/span><br \/>\nbuilder<span class=\"token punctuation\">.<\/span>add_sequence<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span>node_1<span class=\"token punctuation\">,<\/span> node_2<span class=\"token punctuation\">,<\/span> node_3<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><br \/>\nbuilder<span class=\"token punctuation\">.<\/span>add_edge<span class=\"token punctuation\">(<\/span>START<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;node_1&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>graph <span class=\"token operator\">&#061;<\/span> builder<span class=\"token punctuation\">.<\/span><span class=\"token builtin\">compile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>response <span class=\"token operator\">&#061;<\/span> graph<span class=\"token punctuation\">.<\/span>invoke<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;final_result&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;initial&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>response<span class=\"token punctuation\">)<\/span><\/p>\n<h4>\u4e00\u6b21\u6267\u884c\u540e&#xff0c;\u4f60\u4f1a\u770b\u5230\u4ec0\u4e48<\/h4>\n<p>Node1: \u83b7\u53d6\u5230\u654f\u611f\u6570\u636e&#xff0c;\u4f46\u4e0d\u4f1a\u66b4\u9732\u7ed9\u6700\u7ec8\u8f93\u51fa<br \/>\nNode2: \u6b63\u5728\u5904\u7406\u654f\u611f\u6570\u636e: \u8fd9\u662f\u654f\u611f\u4fe1\u606f<br \/>\nNode3: \u53ea\u770b\u5230\u6700\u7ec8\u7ed3\u679c: \u6e05\u7406\u540e\u7684\u5904\u7406\u7ed3\u679c<\/p>\n<p>\u6700\u7ec8\u8f93\u51fa: {&#039;final_result&#039;: &#039;\u6e05\u7406\u540e\u7684\u5904\u7406\u7ed3\u679c &#8211; \u5b8c\u6210&#039;}<\/p>\n<p>\u4ece\u8fd9\u4e2a\u8fc7\u7a0b\u53ef\u4ee5\u770b\u51fa&#xff1a;<\/p>\n<ul>\n<li>sensitive_data \u5728\u8282\u70b9 1 \u548c\u8282\u70b9 2 \u4e4b\u95f4\u4f20\u9012\u6210\u529f<\/li>\n<li>\u5b83\u6ca1\u6709\u8fdb\u5165\u6700\u7ec8\u8f93\u51fa<\/li>\n<li>\u8282\u70b9 3 \u53ea\u770b\u5230\u6e05\u6d17\u540e\u7684\u7ed3\u679c<\/li>\n<\/ul>\n<p>\u8fd9\u5c31\u662f\u79c1\u6709\u72b6\u6001\u4f20\u9012\u7684\u4ef7\u503c\u3002<\/p>\n<h4>\u8fd9\u79cd\u8bbe\u8ba1\u9002\u5408\u4ec0\u4e48\u573a\u666f<\/h4>\n<ul>\n<li>\u6570\u636e\u5904\u7406&#xff1a;\u4e2d\u95f4\u6b65\u9aa4\u7684\u4e34\u65f6\u5b57\u6bb5<\/li>\n<li>\u8ba4\u8bc1\u6d41\u7a0b&#xff1a;token\u3001\u9a8c\u8bc1\u7801\u3001\u5bc6\u94a5\u7247\u6bb5<\/li>\n<li>\u91d1\u878d\u6216\u8ba2\u5355\u7cfb\u7edf&#xff1a;\u539f\u59cb\u660e\u7ec6\u4e0e\u8131\u654f\u7ed3\u679c\u5206\u79bb<\/li>\n<li>Agent \u5de5\u5177\u94fe&#xff1a;\u5de5\u5177\u539f\u59cb\u8fd4\u56de\u548c\u6700\u7ec8\u6458\u8981\u5206\u79bb<\/li>\n<li>\u9519\u8bef\u5904\u7406&#xff1a;\u5185\u90e8\u9519\u8bef\u8be6\u60c5\u4e0e\u5bf9\u5916\u9519\u8bef\u6d88\u606f\u5206\u79bb<\/li>\n<\/ul>\n<h4>\u8fd9\u91cc\u6700\u5bb9\u6613\u8bef\u89e3\u7684\u4e00\u70b9<\/h4>\n<p>\u5f88\u591a\u4eba\u4f1a\u4ee5\u4e3a&#xff1a;<\/p>\n<p>\u201c\u53ea\u8981\u5b57\u6bb5\u4e0d\u5728\u6700\u7ec8 output_schema \u4e2d&#xff0c;\u5c31\u7b97\u79c1\u6709\u72b6\u6001\u4e86\u3002\u201d<\/p>\n<p>\u8fd9\u4e0d\u5b8c\u5168\u5bf9\u3002<\/p>\n<p>\u56e0\u4e3a\u201c\u6700\u7ec8\u4e0d\u8f93\u51fa\u201d\u548c\u201c\u53ea\u5728\u7279\u5b9a\u8282\u70b9\u95f4\u4f20\u9012\u201d\u662f\u4e24\u4e2a\u5c42\u6b21\u7684\u95ee\u9898&#xff1a;<\/p>\n<ul>\n<li>output_schema \u89e3\u51b3\u7684\u662f\u201c\u5bf9\u5916\u66b4\u9732\u4ec0\u4e48\u201d<\/li>\n<li>\u8282\u70b9\u4e13\u5c5e\u8f93\u5165\u8f93\u51fa\u7c7b\u578b&#xff0c;\u89e3\u51b3\u7684\u662f\u201c\u54ea\u4e9b\u8282\u70b9\u80fd\u770b\u5230\u4ec0\u4e48\u201d<\/li>\n<\/ul>\n<p>\u4e5f\u5c31\u662f\u8bf4&#xff1a;<\/p>\n<ul>\n<li>\u4e0d\u8fd4\u56de\u7ed9\u5916\u90e8&#xff0c;\u4e0d\u7b49\u4e8e\u4e0d\u5728\u5185\u90e8\u4f20\u64ad<\/li>\n<li>\u771f\u6b63\u7684\u79c1\u6709\u72b6\u6001&#xff0c;\u9700\u8981\u4f60\u5728\u8282\u70b9\u95f4\u663e\u5f0f\u63a7\u5236\u53ef\u89c1\u8303\u56f4<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e09\u4e2a\u80fd\u529b\u653e\u5728\u4e00\u8d77&#xff0c;\u600e\u4e48\u7406\u89e3\u6700\u6e05\u695a<\/h3>\n<p>\u4f60\u53ef\u4ee5\u628a\u8fd9\u4e09\u8005\u7406\u89e3\u6210\u4e09\u4e2a\u4e0d\u540c\u5c42\u9762\u7684\u63a7\u5236\u80fd\u529b&#xff1a;<\/p>\n<h4>1. Overwrite<\/h4>\n<p>\u89e3\u51b3\u7684\u662f&#xff1a;<\/p>\n<p>\u72b6\u6001\u66f4\u65b0\u65f6&#xff0c;\u5230\u5e95\u662f\u5408\u5e76\u8fd8\u662f\u8986\u76d6&#xff1f;<\/p>\n<h4>2. input_schema \/ output_schema \/ state_schema<\/h4>\n<p>\u89e3\u51b3\u7684\u662f&#xff1a;<\/p>\n<p>\u56fe\u7684\u8f93\u5165\u8fb9\u754c\u3001\u8f93\u51fa\u8fb9\u754c\u3001\u5185\u90e8\u72b6\u6001\u8fb9\u754c\u600e\u4e48\u5212\u5206&#xff1f;<\/p>\n<h4>3. \u8282\u70b9\u95f4\u79c1\u6709\u72b6\u6001<\/h4>\n<p>\u89e3\u51b3\u7684\u662f&#xff1a;<\/p>\n<p>\u67d0\u4e9b\u4e2d\u95f4\u6570\u636e\u5e94\u8be5\u5728\u8c01\u548c\u8c01\u4e4b\u95f4\u6d41\u52a8&#xff0c;\u4e0d\u5e94\u8be5\u88ab\u8c01\u770b\u5230&#xff1f;<\/p>\n<p>\u5982\u679c\u628a\u5b83\u4eec\u7ec4\u5408\u8d77\u6765&#xff0c;\u4f60\u5bf9 LangGraph \u7684\u72b6\u6001\u7ba1\u7406\u5c31\u5df2\u7ecf\u4e0d\u518d\u505c\u7559\u5728\u201c\u80fd\u8dd1\u201d\u7684\u5c42\u9762&#xff0c;\u800c\u662f\u8fdb\u5165\u201c\u53ef\u63a7\u3001\u53ef\u7ef4\u62a4\u3001\u53ef\u4e0a\u7ebf\u201d\u7684\u5c42\u9762\u3002<\/p>\n<hr \/>\n<h3>\u5b9e\u6218\u91cc\u600e\u4e48\u9009<\/h3>\n<p>\u5982\u679c\u4f60\u5728\u5199 LangGraph \u5de5\u4f5c\u6d41&#xff0c;\u53ef\u4ee5\u6309\u8fd9\u4e2a\u5224\u65ad\u987a\u5e8f\u6765&#xff1a;<\/p>\n<h4>\u573a\u666f 1&#xff1a;\u5b57\u6bb5\u9700\u8981\u7ee7\u7eed\u7d2f\u79ef<\/h4>\n<p>\u9009 reducer&#xff0c;\u6bd4\u5982&#xff1a;<\/p>\n<ul>\n<li>operator.add<\/li>\n<li>add_messages<\/li>\n<\/ul>\n<p>\u9002\u7528\u4e8e&#xff1a;<\/p>\n<ul>\n<li>\u6d88\u606f\u5386\u53f2<\/li>\n<li>\u65e5\u5fd7\u5217\u8868<\/li>\n<li>\u68c0\u7d22\u7ed3\u679c\u96c6\u5408<\/li>\n<\/ul>\n<h4>\u573a\u666f 2&#xff1a;\u5b57\u6bb5\u9700\u8981\u6574\u6bb5\u66ff\u6362<\/h4>\n<p>\u9009 Overwrite<\/p>\n<p>\u9002\u7528\u4e8e&#xff1a;<\/p>\n<ul>\n<li>\u91cd\u7f6e\u4e0a\u4e0b\u6587<\/li>\n<li>\u8986\u76d6\u7f13\u5b58<\/li>\n<li>\u6e05\u7a7a\u540e\u91cd\u65b0\u5f00\u59cb<\/li>\n<\/ul>\n<h4>\u573a\u666f 3&#xff1a;\u5bf9\u5916\u63a5\u53e3\u548c\u5185\u90e8\u72b6\u6001\u4e0d\u4e00\u81f4<\/h4>\n<p>\u62c6\u5206&#xff1a;<\/p>\n<ul>\n<li>input_schema<\/li>\n<li>output_schema<\/li>\n<li>state_schema<\/li>\n<\/ul>\n<p>\u9002\u7528\u4e8e&#xff1a;<\/p>\n<ul>\n<li>API \u670d\u52a1<\/li>\n<li>\u590d\u6742 Agent \u7f16\u6392<\/li>\n<li>\u5185\u90e8\u5b57\u6bb5\u8f83\u591a\u7684\u5de5\u4f5c\u6d41<\/li>\n<\/ul>\n<h4>\u573a\u666f 4&#xff1a;\u4e2d\u95f4\u654f\u611f\u6570\u636e\u53ea\u5141\u8bb8\u5c40\u90e8\u6d41\u8f6c<\/h4>\n<p>\u4f7f\u7528\u8282\u70b9\u7279\u5b9a\u7684\u8f93\u5165 \/ \u8f93\u51fa\u72b6\u6001\u5b9a\u4e49<\/p>\n<p>\u9002\u7528\u4e8e&#xff1a;<\/p>\n<ul>\n<li>\u654f\u611f\u5b57\u6bb5\u5904\u7406<\/li>\n<li>\u8131\u654f\u94fe\u8def<\/li>\n<li>\u5185\u90e8\u5ba1\u6838\u4e0e\u5bf9\u5916\u7ed3\u679c\u5206\u79bb<\/li>\n<\/ul>\n<hr \/>\n<h3>\u5e38\u89c1\u5751\u70b9<\/h3>\n<h4>\u5751 1&#xff1a;\u4ee5\u4e3a\u6240\u6709\u72b6\u6001\u66f4\u65b0\u90fd\u5e94\u8be5\u8d70 append<\/h4>\n<p>\u5e76\u4e0d\u662f\u3002<\/p>\n<p>\u6709\u4e9b\u5b57\u6bb5\u5929\u7136\u5c31\u662f\u201c\u8986\u76d6\u578b\u201d&#xff0c;\u8fd9\u65f6\u7ee7\u7eed append \u53ea\u4f1a\u8ba9\u72b6\u6001\u8d8a\u6765\u8d8a\u810f\u3002<\/p>\n<h4>\u5751 2&#xff1a;\u628a\u5185\u90e8\u4e2d\u95f4\u5b57\u6bb5\u76f4\u63a5\u66b4\u9732\u7ed9\u8f93\u51fa<\/h4>\n<p>\u8fd9\u5728 Demo \u91cc\u770b\u8d77\u6765\u65e0\u6240\u8c13&#xff0c;\u4f46\u5728\u6b63\u5f0f\u63a5\u53e3\u91cc\u4f1a\u5e26\u6765\u4e24\u4e2a\u95ee\u9898&#xff1a;<\/p>\n<ul>\n<li>\u8fd4\u56de\u7ed3\u6784\u6df7\u4e71<\/li>\n<li>\u6cc4\u9732\u5185\u90e8\u5b9e\u73b0\u7ec6\u8282<\/li>\n<\/ul>\n<h4>\u5751 3&#xff1a;\u628a\u201c\u6700\u7ec8\u4e0d\u8f93\u51fa\u201d\u548c\u201c\u8282\u70b9\u4e0d\u53ef\u89c1\u201d\u6df7\u4e3a\u4e00\u8c08<\/h4>\n<p>\u524d\u8005\u662f\u8f93\u51fa\u5c42\u63a7\u5236\u3002<\/p>\n<p>\u540e\u8005\u662f\u8282\u70b9\u7ea7\u72b6\u6001\u53ef\u89c1\u6027\u63a7\u5236\u3002<\/p>\n<p>\u8fd9\u4e24\u4e2a\u4e0d\u662f\u4e00\u56de\u4e8b\u3002<\/p>\n<h4>\u5751 4&#xff1a;\u72b6\u6001\u8bbe\u8ba1\u8fc7\u65e9\u8d2a\u5927<\/h4>\n<p>\u5f88\u591a\u4eba\u4e00\u5f00\u59cb\u5c31\u628a\u6240\u6709\u5b57\u6bb5\u90fd\u5806\u8fdb\u4e00\u4e2a\u5927 TypedDict 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