{"id":119751,"date":"2026-10-30T09:48:28","date_gmt":"2026-10-30T01:48:28","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/119751.html"},"modified":"2026-10-30T09:48:28","modified_gmt":"2026-10-30T01:48:28","slug":"langchain-%e8%81%8a%e5%a4%a9%e6%a8%a1%e5%9e%8b%e4%b8%ad%e5%b7%a5%e5%85%b7%e7%9a%84%e8%b0%83%e7%94%a8%e8%af%a6%e8%a7%a3-%e3%80%8ahello-langchain-langgraph%e3%80%8b3","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/119751.html","title":{"rendered":"LangChain \u804a\u5929\u6a21\u578b\u4e2d\u5de5\u5177\u7684\u8c03\u7528\u8be6\u89e3----\u300aHello LangChain LangGraph!\u300b(3)"},"content":{"rendered":"<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>LangChain \u804a\u5929\u6a21\u578b\u4e2d\u5de5\u5177\u7684\u8c03\u7528\u8be6\u89e3<\/li>\n<li>\n<ul>\n<li>\u804a\u5929\u6a21\u578b\u4e2d\u5de5\u5177\u7684\u8c03\u7528<\/li>\n<li>\n<ul>\n<li>\u521b\u5efa\u5de5\u5177<\/li>\n<li>\u7ed1\u5b9a\u5de5\u5177<\/li>\n<li>\u5de5\u5177\u7684\u8c03\u7528<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>LangChain \u804a\u5929\u6a21\u578b\u4e2d\u5de5\u5177\u7684\u8c03\u7528\u8be6\u89e3<\/h2>\n<h3>\u804a\u5929\u6a21\u578b\u4e2d\u5de5\u5177\u7684\u8c03\u7528<\/h3>\n<p>\u8c03\u7528\u5de5\u5177\u7684\u4e00\u822c\u6b65\u9aa4:<\/p>\n<p>\u5b9a\u4e49\u5de5\u5177(\u521b\u5efa\u5de5\u5177)-&gt;\u7ed1\u5b9a\u5de5\u5177-&gt;\u8c03\u7528\u5de5\u5177<\/p>\n<p>LangChain\u63d0\u4f9b\u7684\u73b0\u6210\u7684\u5de5\u5177\u548c\u5de5\u5177\u5305:(\u5de5\u5177\u4e00\u822c\u90fd\u4e0d\u9700\u8981\u81ea\u5df1\u624b\u6413)<\/p>\n<p>LangChain Python integrations &#8211; Docs by LangChain\u53ef\u4ee5\u5728\u8fd9\u91cc\u9762\u83b7\u53d6<\/p>\n<h4>\u521b\u5efa\u5de5\u5177<\/h4>\n<p>1.\u5728 LangChain \u4e2d&#xff0c;\u5b9e\u73b0\u4e86\u4e00\u4e2a &#064;tool \u88c5\u9970\u5668\u6765\u521b\u5efa\u5de5\u5177&#xff0c;&#064;tool \u88c5\u9970\u5668\u662f\u81ea\u5b9a\u4e49\u5de5\u5177\u7684\u6700\u7b80\u5355\u65b9\u6cd5\u3002<\/p>\n<p> <span class=\"token comment\"># \u5b9a\u4e49\u5de5\u5177<\/span><br \/>\n<span class=\"token decorator annotation punctuation\">&#064;tool<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token comment\"># \u51fd\u6570\u5b9a\u4e49<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u4e24\u6570\u76f8\u52a0<\/p>\n<p>    Args:<br \/>\n        a: \u7b2c\u4e00\u4e2a\u6574\u6570<br \/>\n        b: \u7b2c\u4e8c\u4e2a\u6574\u6570<br \/>\n    &#034;&#034;&#034;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b <span class=\"token comment\"># \u51fd\u6570\u4f53<\/span><\/p>\n<p>\u4e00\u5171\u5c31\u662f4\u4e2a\u90e8\u5206:<\/p>\n<p>&#064;tool \u88c5\u9970\u5668&#xff1a;\u628a\u666e\u901a\u51fd\u6570\u6807\u8bb0\u4e3a\u300cLangChain \u5de5\u5177\u300d<\/p>\n<p>\u51fd\u6570\u5b9a\u4e49&#xff1a;\u5de5\u5177\u7684\u540d\u79f0\u3001\u53c2\u6570\u3001\u8fd4\u56de\u503c<\/p>\n<p>\u6587\u6863\u5b57\u7b26\u4e32&#xff08;Docstring&#xff09;&#xff1a;\u7ed9\u6a21\u578b\u770b\u7684\u300c\u5de5\u5177\u8bf4\u660e\u4e66\u300d<\/p>\n<p>\u51fd\u6570\u4f53&#xff1a;\u5de5\u5177\u7684\u5e95\u5c42\u6267\u884c\u903b\u8f91<\/p>\n<p>\u2013LangChain \u7528 &#064;tool \u88c5\u9970\u5668\u65f6&#xff0c;\u4f1a\u81ea\u52a8\u6839\u636e\u4f60\u7684\u51fd\u6570\u751f\u6210 Schema(\u5de5\u5177\u540d\u9ed8\u8ba4\u7528\u51fd\u6570\u540d&#xff1b;\u5de5\u5177\u63cf\u8ff0\u9ed8\u8ba4\u7528\u51fd\u6570\u7684\u6587\u6863\u5b57\u7b26\u4e32)<\/p>\n<p>\u2013\u82e5\u662f\u7b80\u5355\u5b9a\u4e49\u5de5\u5177&#xff0c;\u5982\u4e0a\u8ff0\u793a\u4f8b&#xff0c;\u5de5\u5177 schema \u9700\u8981\u89e3\u6790 Google \u98ce\u683c\u7684\u6587\u6863\u5b57\u7b26\u4e32\u53bb\u83b7\u53d6\u53c2\u6570\u63cf\u8ff0<\/p>\n<p>\u9664\u4e86\u4e0a\u9762\u8fd9\u79cd\u65b9\u5f0f&#xff0c;\u8fd8\u6709\u5176\u4ed6\u65b9\u5f0f\u53ef\u4ee5\u8ba9\u5de5\u5177 schema&#xff0c;\u83b7\u53d6\u76f8\u5173\u5de5\u5177\u58f0\u660e\u9700\u8981\u7684\u5185\u5bb9:<\/p>\n<p>1.\u6a21\u5f0f1:\u4f9d\u8d56Pydantic\u7c7b<\/p>\n<p>  <span class=\"token comment\"># pydantic \u6570\u636e\u9a8c\u8bc1<\/span><br \/>\n<span class=\"token keyword\">from<\/span> pydantic <span class=\"token keyword\">import<\/span> BaseModel<span class=\"token punctuation\">,<\/span> Field<br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">AddInput<\/span><span class=\"token punctuation\">(<\/span>BaseModel<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;Add two integers.&#034;&#034;&#034;<\/span><\/p>\n<p>    a<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span> <span class=\"token operator\">&#061;<\/span> Field<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> description<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;First integer&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    b<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span> <span class=\"token operator\">&#061;<\/span> Field<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> description<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;Second integer&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token comment\"># \u9664\u975e\u63d0\u4f9b\u9ed8\u8ba4\u503c&#xff0c;\u4e0d\u7136\u8fd9\u91cc\u6240\u6709\u7684\u5b57\u6bb5\u5728\u8c03\u7528\u5de5\u5177\u65f6\u90fd\u662f\u5fc5\u586b\u7684<\/span><\/p>\n<p><span class=\"token comment\"># \u5b9a\u4e49\u5de5\u5177<\/span><br \/>\n<span class=\"token keyword\">from<\/span> langchain_core<span class=\"token punctuation\">.<\/span>tools <span class=\"token keyword\">import<\/span> tool<br \/>\n<span class=\"token decorator annotation punctuation\">&#064;tool<\/span><span class=\"token punctuation\">(<\/span>args_schema<span class=\"token operator\">&#061;<\/span>AddInput<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b<\/p>\n<p>2.\u6a21\u5f0f2:\u4f9d\u8d56Annotated\u7c7b<\/p>\n<p>  <span class=\"token keyword\">from<\/span> langchain_core<span class=\"token punctuation\">.<\/span>tools <span class=\"token keyword\">import<\/span> tool<br \/>\n<span class=\"token keyword\">from<\/span> typing_extensions <span class=\"token keyword\">import<\/span> Annotated<\/p>\n<p><span class=\"token decorator annotation punctuation\">&#064;tool<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    a<span class=\"token punctuation\">:<\/span> Annotated<span class=\"token punctuation\">[<\/span><span class=\"token builtin\">int<\/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> <span class=\"token string\">&#034;First integer&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    b<span class=\"token punctuation\">:<\/span> Annotated<span class=\"token punctuation\">[<\/span><span class=\"token builtin\">int<\/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> <span class=\"token string\">&#034;Second integer&#034;<\/span><span class=\"token punctuation\">]<\/span><br \/>\n<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;Add two integers.&#034;&#034;&#034;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b<\/p>\n<p>2.\u4f7f\u7528StructuredTool\u7c7b\u63d0\u4f9b\u7684\u51fd\u6570\u521b\u5efa\u5de5\u5177:<\/p>\n<p>\u8fd9\u4e2a\u7c7b\u5176\u4e2d\u7684from_function\u7c7b\u65b9\u6cd5\u901a\u8fc7\u7ed9\u5b9a\u7684\u51fd\u6570\u6765\u521b\u5efa\u5e76\u8fd4\u56de\u4e00\u4e2a\u5de5\u5177<\/p>\n<p> from_function\u7c7b\u65b9\u6cd5\u7684\u5b9a\u4e49<span class=\"token punctuation\">:<\/span><\/p>\n<p><span class=\"token decorator annotation punctuation\">&#064;classmethod<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">from_function<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token comment\"># 1. \u540c\u6b65\u51fd\u6570&#xff1a;\u5de5\u5177\u7684\u6838\u5fc3\u6267\u884c\u903b\u8f91&#xff08;\u6bd4\u5982\u52a0\u6cd5\u3001\u67e5\u8be2\u5929\u6c14&#xff09;<\/span><br \/>\n    func<span class=\"token punctuation\">:<\/span> Callable <span class=\"token operator\">|<\/span> <span class=\"token boolean\">None<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">None<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token comment\"># 2. \u5f02\u6b65\u534f\u7a0b\u51fd\u6570&#xff1a;\u5982\u679c\u5de5\u5177\u662f\u5f02\u6b65\u6267\u884c\u7684&#xff0c;\u4f20\u8fd9\u4e2a\u53c2\u6570<\/span><br \/>\n    coroutine<span class=\"token punctuation\">:<\/span> Callable<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><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> Awaitable<span class=\"token punctuation\">[<\/span>Any<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">|<\/span> <span class=\"token boolean\">None<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">None<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token comment\"># 3. \u5de5\u5177\u540d\u79f0&#xff1a;AI \u8c03\u7528\u5de5\u5177\u65f6\u7528\u7684\u540d\u5b57&#xff0c;\u9ed8\u8ba4\u53d6\u51fd\u6570\u540d<\/span><br \/>\n    name<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">str<\/span> <span class=\"token operator\">|<\/span> <span class=\"token boolean\">None<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">None<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token comment\"># 4. \u5de5\u5177\u63cf\u8ff0&#xff1a;\u7ed9 AI \u770b\u7684\u8bf4\u660e\u4e66&#xff0c;AI \u9760\u5b83\u5224\u65ad\u662f\u5426\u8c03\u7528\u8be5\u5de5\u5177<\/span><br \/>\n    description<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">str<\/span> <span class=\"token operator\">|<\/span> <span class=\"token boolean\">None<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">None<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token comment\"># 5. \u662f\u5426\u76f4\u63a5\u8fd4\u56de\u7ed3\u679c&#xff1a;True&#061;\u5de5\u5177\u7ed3\u679c\u76f4\u63a5\u7ed9\u7528\u6237&#xff0c;\u4e0d\u7ecf\u8fc7AI\u6574\u7406&#xff1b;False&#061;AI\u4f1a\u4e8c\u6b21\u52a0\u5de5\u56de\u7b54<\/span><br \/>\n    return_direct<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">bool<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">False<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token comment\"># 6. \u53c2\u6570\u6821\u9a8c\u6a21\u677f&#xff1a;Pydantic \u7684 BaseModel&#xff0c;\u5b9a\u4e49\u5de5\u5177\u5fc5\u586b\/\u9009\u586b\u53c2\u6570\u3001\u7c7b\u578b<\/span><br \/>\n    args_schema<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">type<\/span><span class=\"token punctuation\">[<\/span>BaseModel<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">|<\/span> <span class=\"token builtin\">dict<\/span><span class=\"token punctuation\">[<\/span><span class=\"token builtin\">str<\/span><span class=\"token punctuation\">,<\/span> Any<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">|<\/span> <span class=\"token boolean\">None<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">None<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token comment\"># 7. \u662f\u5426\u81ea\u52a8\u63a8\u65ad\u53c2\u6570Schema&#xff1a;\u81ea\u52a8\u4ece\u51fd\u6570\u6ce8\u89e3\u3001\u6587\u6863\u5b57\u7b26\u4e32\u751f\u6210\u53c2\u6570\u89c4\u5219<\/span><br \/>\n    infer_schema<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">bool<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">True<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token comment\"># \u5f3a\u5236\u5173\u952e\u5b57\u53c2\u6570\u5206\u9694\u7b26&#xff1a;\u540e\u9762\u7684\u53c2\u6570\u5fc5\u987b\u7528 key&#061;value \u7684\u5f62\u5f0f\u4f20\u53c2<\/span><br \/>\n    <span class=\"token operator\">*<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token comment\"># 8. \u54cd\u5e94\u683c\u5f0f&#xff1a;content&#061;\u53ea\u8fd4\u56de\u7eaf\u6587\u672c\u7ed9AI&#xff1b;content_and_artifact&#061;\u8fd4\u56de\u6587\u672c&#043;\u539f\u59cb\u6570\u636e&#xff08;\u4f60\u521a\u5b66\u7684&#xff09;<\/span><br \/>\n    response_format<span class=\"token punctuation\">:<\/span> Literal<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;content&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;content_and_artifact&#039;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;content&#039;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token comment\"># 9. \u662f\u5426\u81ea\u52a8\u89e3\u6790\u6587\u6863\u5b57\u7b26\u4e32&#xff1a;\u81ea\u52a8\u4ece\u51fd\u6570 &#034;&#034;&#034;\u6ce8\u91ca&#034;&#034;&#034; \u63d0\u53d6\u63cf\u8ff0\u3001\u53c2\u6570\u8bf4\u660e<\/span><br \/>\n    parse_docstring<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">bool<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">False<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token comment\"># 10. \u6587\u6863\u5b57\u7b26\u4e32\u4e0d\u5408\u6cd5\u65f6\u662f\u5426\u62a5\u9519&#xff1a;\u5f00\u542f\u540e&#xff0c;\u6ce8\u91ca\u683c\u5f0f\u9519\u4e86\u76f4\u63a5\u629b\u9519<\/span><br \/>\n    error_on_invalid_docstring<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">bool<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">False<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token comment\"># 11. \u989d\u5916\u53c2\u6570&#xff1a;\u63a5\u6536\u6240\u6709\u672a\u5b9a\u4e49\u7684\u5173\u952e\u5b57\u53c2\u6570<\/span><br \/>\n    <span class=\"token operator\">**<\/span>kwargs<span class=\"token punctuation\">:<\/span> Any<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token comment\"># \u65b9\u6cd5\u8fd4\u56de\u503c&#xff1a;\u4e00\u4e2a\u6807\u51c6\u7684 LangChain \u7ed3\u6784\u5316\u5de5\u5177&#xff08;StructuredTool&#xff09;\u5bf9\u8c61<\/span><br \/>\n<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> StructuredTool<span class=\"token punctuation\">:<\/span><\/p>\n<p>\u5176\u7684\u5b98\u65b9\u6587\u6863\u4ecb\u7ecd:from_function | langchain_core | LangChain Reference<\/p>\n<p>\u7528\u6cd5\u4ecb\u7ecd:<\/p>\n<p> \u7528\u6cd5\u4e00<span class=\"token punctuation\">:<\/span><\/p>\n<p><span class=\"token keyword\">from<\/span> langchain_core<span class=\"token punctuation\">.<\/span>tools <span class=\"token keyword\">import<\/span> StructuredTool<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">multiply<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;Multiply two numbers.&#034;&#034;&#034;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">*<\/span> b<\/p>\n<p>calculator_tool <span class=\"token operator\">&#061;<\/span> StructuredTool<span class=\"token punctuation\">.<\/span>from_function<span class=\"token punctuation\">(<\/span>func<span class=\"token operator\">&#061;<\/span>multiply<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>calculator_tool<span class=\"token punctuation\">.<\/span>invoke<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;a&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;b&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># \u8f93\u51fa: 6<\/span><\/p>\n<p> \u7528\u6cd5\u4e8c<span class=\"token punctuation\">:<\/span><br \/>\n\u4f7f\u7528 args_schema \u53c2\u6570&#xff0c;\u4f9d\u8d56 Pydantic \u7c7b\u5b9a\u4e49\u5e76\u63d0\u4f9b\u5de5\u5177\u8f93\u5165\u53c2\u6570\u7684 schema \u5c5e\u6027<br \/>\n\u4f7f\u7528 description \u53c2\u6570&#xff0c;\u66ff\u4ee3\u6587\u6863\u5b57\u7b26\u4e32\u4e2d\u5bf9\u4e8e\u5de5\u5177\u63cf\u8ff0\u7684 schema \u5c5e\u6027<br \/>\n<span class=\"token keyword\">from<\/span> langchain_core<span class=\"token punctuation\">.<\/span>tools <span class=\"token keyword\">import<\/span> StructuredTool<br \/>\n<span class=\"token keyword\">from<\/span> pydantic <span class=\"token keyword\">import<\/span> BaseModel<span class=\"token punctuation\">,<\/span> Field<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">CalculatorInput<\/span><span class=\"token punctuation\">(<\/span>BaseModel<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    a<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span> <span class=\"token operator\">&#061;<\/span> Field<span class=\"token punctuation\">(<\/span>description<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;first number&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    b<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span> <span class=\"token operator\">&#061;<\/span> Field<span class=\"token punctuation\">(<\/span>description<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;second number&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">multiply<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">*<\/span> b<\/p>\n<p>calculator_tool <span class=\"token operator\">&#061;<\/span> StructuredTool<span class=\"token punctuation\">.<\/span>from_function<span class=\"token punctuation\">(<\/span><br \/>\n    func<span class=\"token operator\">&#061;<\/span>multiply<span class=\"token punctuation\">,<\/span><br \/>\n    name<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;Calculator&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    description<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;\u4e24\u6570\u76f8\u4e58&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    args_schema<span class=\"token operator\">&#061;<\/span>CalculatorInput<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>calculator_tool<span class=\"token punctuation\">.<\/span>invoke<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;a&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;b&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># \u8f93\u51fa: 6<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>calculator_tool<span class=\"token punctuation\">.<\/span>name<span class=\"token punctuation\">)<\/span>                      <span class=\"token comment\"># \u8f93\u51fa: Calculator<\/span><\/p>\n<p> \u7528\u6cd5\u4e09<span class=\"token punctuation\">:<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">AddInput<\/span><span class=\"token punctuation\">(<\/span>BaseModel<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    a<span class=\"token punctuation\">:<\/span><span class=\"token builtin\">int<\/span> <span class=\"token operator\">&#061;<\/span> Field<span class=\"token punctuation\">(<\/span>description<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;\u7b2c\u4e00\u4e2a\u6574\u6570&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    b<span class=\"token punctuation\">:<\/span><span class=\"token builtin\">int<\/span> <span class=\"token operator\">&#061;<\/span> Field<span class=\"token punctuation\">(<\/span>description<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;\u7b2c\u4e8c\u4e2a\u6574\u6570&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token comment\">#a:int\u548cb:int\u662f\u7c7b\u578b\u6ce8\u89e3&#xff0c;\u88ab\u5f53\u4f5c&#034;\u7c7b\u578b\u63d0\u793a&#034;\u4f20\u9012\u7ed9\u5de5\u5177schema<\/span><\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> Tuple<span class=\"token punctuation\">[<\/span><span class=\"token builtin\">str<\/span><span class=\"token punctuation\">,<\/span> List<span class=\"token punctuation\">[<\/span><span class=\"token builtin\">int<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    nums <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span>a<span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">]<\/span><br \/>\n    content <span class=\"token operator\">&#061;<\/span> <span class=\"token string-interpolation\"><span class=\"token string\">f&#034;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>nums<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">\u76f8\u52a0\u7684\u7ed3\u679c\u662f<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>a <span class=\"token operator\">&#043;<\/span> b<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><br \/>\n    <span class=\"token keyword\">return<\/span> content<span class=\"token punctuation\">,<\/span> nums<\/p>\n<p>add_tool <span class=\"token operator\">&#061;<\/span> StructuredTool<span class=\"token punctuation\">.<\/span>from_function<span class=\"token punctuation\">(<\/span><br \/>\n    func<span class=\"token operator\">&#061;<\/span>add<span class=\"token punctuation\">,<\/span><br \/>\n    name<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;ADD&#034;<\/span><span class=\"token punctuation\">,<\/span>             <span class=\"token comment\"># \u5de5\u5177\u540d<\/span><br \/>\n    description<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;\u4e24\u6570\u76f8\u52a0&#034;<\/span><span class=\"token punctuation\">,<\/span>   <span class=\"token comment\"># \u5de5\u5177\u63cf\u8ff0<\/span><br \/>\n    args_schema<span class=\"token operator\">&#061;<\/span>AddInput<span class=\"token punctuation\">,<\/span>   <span class=\"token comment\"># \u5de5\u5177\u53c2\u6570<\/span><br \/>\n    response_format<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;content_and_artifact&#034;<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u6a21\u62df\u5927\u6a21\u578b\u8c03\u7528\u59ff\u52bf &#8211;\u8fd9\u6837\u624d\u80fd\u8fd4\u56de\u770b\u5230\u5927\u6a21\u578b\u5206\u6790\u7684\u8fc7\u7a0b\u548c\u7ed3\u679c<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>add_tool<span class=\"token punctuation\">.<\/span>invoke<span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token string\">&#034;name&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;ADD&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;args&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;a&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;b&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;type&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;tool_call&#034;<\/span><span class=\"token punctuation\">,<\/span>  <span class=\"token comment\"># \u5fc5\u586b<\/span><br \/>\n        <span class=\"token string\">&#034;id&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;111&#034;<\/span><span class=\"token punctuation\">,<\/span>  <span class=\"token comment\"># \u5fc5\u586b, \u7528\u6765\u5c06\u5de5\u5177\u8c03\u7528\u8bf7\u6c42\u548c\u7ed3\u679c\u5173\u8054\u8d77\u6765\u3002<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token comment\"># \u624b\u52a8\u8c03\u7528<\/span><br \/>\n<span class=\"token comment\"># print(add_tool.invoke({&#034;a&#034;: 2, &#034;b&#034;: 5}))<\/span><\/p>\n<h4>\u7ed1\u5b9a\u5de5\u5177<\/h4>\n<p>\u4f7f\u7528\u804a\u5929\u6a21\u578b\u91cc\u9762\u7684.bind_tools()\u65b9\u6cd5<\/p>\n<p>\u2013\u8fd9\u91cc\u53ea\u4ecb\u7ecd\u5e38\u89c1\u53c2\u6570\u548c\u7528\u6cd5&#xff0c;\u81f3\u4e8e\u8be6\u7ec6\u7684\u53c2\u6570\u4ecb\u7ecd&#xff0c;\u53ef\u4ee5\u53bb\u5b98\u65b9\u6587\u6863\u4e86\u89e3<\/p>\n<p> \u5047\u5982\u5df2\u7ecf\u5b9a\u4e49\u597d\u4e86\u4e24\u4e2a\u5de5\u5177<span class=\"token punctuation\">:<\/span>add\u548cmultiply<br \/>\n<span class=\"token comment\"># \u6536\u96c6\u5de5\u5177<\/span><br \/>\ntools <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span>add<span class=\"token punctuation\">,<\/span> multiply<span class=\"token punctuation\">]<\/span><br \/>\n<span class=\"token comment\"># \u5f3a\u5236\u7ed1\u5b9a\u5de5\u5177<\/span><br \/>\nmodel_with_tools <span class=\"token operator\">&#061;<\/span> model<span class=\"token punctuation\">.<\/span>bind_tools<span class=\"token punctuation\">(<\/span>tools<span class=\"token operator\">&#061;<\/span>tools<span class=\"token punctuation\">)<\/span> <span class=\"token comment\"># \u4f1a\u8fd4\u56de\u4e00\u4e2aRunnable\u5b9e\u4f8b<\/span><\/p>\n<h4>\u5de5\u5177\u7684\u8c03\u7528<\/h4>\n<p>\u666e\u901a\u8c03\u7528:<\/p>\n<p> result <span class=\"token operator\">&#061;<\/span> model_with_tools<span class=\"token punctuation\">.<\/span>invoke<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;9\u4e586\u7b49\u4e8e\u591a\u5c11?&#034;<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\">#\u8fd4\u56de\u7684\u662fAIMessage<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u4f46\u662f\u6a21\u578bhi\u6839\u636e\u8f93\u5165\u7684\u76f8\u5173\u6027\u636e\u6b38\u7684\u90a3\u4e2a\u4f55\u65f6\u4f7f\u7528\u5de5\u5177&#xff0c;\u5982\u679c\u7ed9\u5b9a\u7684\u662f\u4e00\u4e2a\u4e0d\u76f8\u5173\u8f93\u5165\u7684\u8bdd&#xff0c;\u6a21\u578b\u90fd\u4e0d\u4f1a\u53bb\u8c03\u7528\u8fd9\u4e2a\u5de5\u5177<\/p>\n<p>\u5f3a\u5236\u6a21\u578b\u8c03\u7528\u5de5\u5177:<\/p>\n<p> model_with_tools <span class=\"token operator\">&#061;<\/span> model<span class=\"token punctuation\">.<\/span>bind_tools<span class=\"token punctuation\">(<\/span>tools<span class=\"token punctuation\">,<\/span> tool_choice<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;any&#034;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\"># \u8981\u6c42\u6a21\u578b\u81f3\u5c11\u8c03\u7528\u5176\u4e2d\u7684\u4e00\u4e2a\u5de5\u5177<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> model_with_tools<span class=\"token punctuation\">.<\/span>invoke<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;hello world!&#034;<\/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<p>\u5982\u679c\u8c03\u7528\u4e86\u5de5\u5177\u7684\u8bdd&#xff0c;result\u5c06\u5177\u6709\u4e00\u4e2atool_calls\u5c5e\u6027&#xff0c;\u8fd9\u4e2a\u5c5e\u6027\u91cc\u9762\u5305\u62ec\u4e86\u6267\u884c\u8fd9\u8ddf\u5de5\u5177\u6240\u9700\u7684\u4e00\u5207(\u6bd4\u5982\u5de5\u5177\u540d\u79f0\u548c\u8f93\u5165\u53c2\u6570)<\/p>\n<p>result.content\u662f\u7ed9\u5927\u6a21\u578b\u770b\u7684\u6587\u672c\u7ed3\u679c<\/p>\n<p>result.artifact\u662f\u7ed9\u540e\u7eed\u7ec4\u4ef6\u7528\u7684\u539f\u59cb\u6570\u636e<\/p>\n<p>\u5982\u679c\u53ea\u50cf\u4e0a\u9762\u90a3\u6837\u8c03\u7528\u7684\u8bdd&#xff0c;\u53ea\u4f1a\u770b\u5230\u6a21\u578b\u8981\u6c42\u8c03\u7528\u5de5\u5177\u7684\u6307\u4ee4(\u4e5f\u5c31\u662f\u7b2c\u4e00\u6b21AIMessage)&#xff0c;\u6b64\u65f6\u5e76\u6ca1\u6709\u5f97\u5230\u6700\u7ec8\u7ed3\u679c<\/p>\n<p>\u540e\u7eed\u5e94\u8be5\u672c\u5730\u4ee3\u7801\u63a5\u7ba1\u8fd9\u4e2a\u6d41\u7a0b\u7136\u540e\u8c03\u7528\u5de5\u5177&#xff0c;\u628a\u7ed3\u679c\u6784\u9020\u6210\u4e00\u4e2aToolMessage\u53d1\u9001\u7ed9\u6a21\u578b,\u7136\u540e\u6a21\u578b\u603b\u7ed3(\u6b64\u65f6\u6a21\u578b\u6536\u5230\u4e86\u524d\u9762\u7684\u5b8c\u6574\u7684\u5bf9\u8bdd:HumanMessage[\u7528\u6237\u8be2\u95ee]\u3001AIMessage(\u6a21\u578b\u8bf7\u6c42\u8c03\u7528\u5de5\u5177)\u3001ToolMessage(\u5de5\u5177\u8fd4\u56de\u7684\u7ed3\u679c))\u5e76\u8f93\u51fa\u6700\u7ec8\u7b54\u6848(AIMessage\u7684\u5f62\u5f0f\u4f20\u56de\u672c\u5730)<\/p>\n<p> \u5b8c\u6574\u7684\u5de5\u5177\u8c03\u7528\u5e94\u8be5\u662f<span class=\"token punctuation\">:<\/span><br \/>\n<span class=\"token comment\"># \u5b9a\u4e49\u6d88\u606f\u5217\u8868&#xff0c;\u6dfb\u52a0\u8981\u4f20\u9012\u7ed9\u804a\u5929\u6a21\u578b\u7684\u6d88\u606f<\/span><br \/>\nmessage <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><br \/>\n    HumanMessage<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;2\u4e583\u7b49\u4e8e\u591a\u5c11&#xff1f;6\u52a06\u7b49\u4e8e\u591a\u5c11&#xff1f;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">]<\/span><br \/>\nai_msg <span class=\"token operator\">&#061;<\/span> model_with_tools<span class=\"token punctuation\">.<\/span>invoke<span class=\"token punctuation\">(<\/span>message<span class=\"token punctuation\">)<\/span><br \/>\nmessage<span class=\"token punctuation\">.<\/span>append<span class=\"token punctuation\">(<\/span>ai_msg<span class=\"token punctuation\">)<\/span> <span class=\"token comment\"># \u628aAIMessage\u8ffd\u52a0\u5230message\u540e\u9762<\/span><\/p>\n<p><span class=\"token comment\"># \u6784\u9020ToolMessage, \u5e76\u6dfb\u52a0\u5230\u6d88\u606f\u5217\u8868\u4e2d\u53bb<\/span><br \/>\n<span class=\"token keyword\">for<\/span> tool_call <span class=\"token keyword\">in<\/span> ai_msg<span class=\"token punctuation\">.<\/span>tool_calls<span class=\"token punctuation\">:<\/span><br \/>\n    selected_tool <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;add&#034;<\/span><span class=\"token punctuation\">:<\/span> add<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;multiply&#034;<\/span><span class=\"token punctuation\">:<\/span> multiply<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">[<\/span>tool_call<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;name&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>lower<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">]<\/span><span class=\"token comment\"># \u521b\u5efa\u5b57\u5178&#043;\u4ece\u5b57\u5178\u4e2d\u9009\u62e9<\/span><br \/>\n    tool_msg <span class=\"token operator\">&#061;<\/span> selected_tool<span class=\"token punctuation\">.<\/span>invoke<span class=\"token punctuation\">(<\/span>tool_call<span class=\"token punctuation\">)<\/span><br \/>\n    message<span class=\"token punctuation\">.<\/span>append<span class=\"token punctuation\">(<\/span>tool_msg<span class=\"token punctuation\">)<\/span> <span class=\"token comment\"># \u8ffd\u52a0ToolMessage<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>model_with_tools<span class=\"token punctuation\">.<\/span>invoke<span class=\"token punctuation\">(<\/span>message<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>content<span class=\"token punctuation\">)<\/span> <span class=\"token comment\">#\u8fd9\u624d\u662f\u6700\u7ec8\u7ed3\u679c<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u76ee\u5f55LangChain \u804a\u5929\u6a21\u578b\u4e2d\u5de5\u5177\u7684\u8c03\u7528\u8be6\u89e3\u804a\u5929\u6a21\u578b\u4e2d\u5de5\u5177\u7684\u8c03\u7528\u521b\u5efa\u5de5\u5177\u7ed1\u5b9a\u5de5\u5177\u5de5\u5177\u7684\u8c03\u7528LangChain \u804a\u5929\u6a21\u578b\u4e2d\u5de5\u5177\u7684\u8c03\u7528\u8be6\u89e3<br \/>\n\u804a\u5929\u6a21\u578b\u4e2d\u5de5\u5177\u7684\u8c03\u7528 \u8c03\u7528\u5de5\u5177\u7684\u4e00\u822c\u6b65\u9aa4: \u5b9a\u4e49\u5de5\u5177(\u521b\u5efa\u5de5\u5177)-&gt;\u7ed1\u5b9a\u5de5\u5177-&gt;\u8c03\u7528\u5de5\u5177 LangChain\u63d0\u4f9b\u7684\u73b0\u6210\u7684\u5de5\u5177\u548c\u5de5\u5177\u5305:(\u5de5\u5177\u4e00\u822c\u90fd\u4e0d\u9700\u8981\u81ea\u5df1\u624b\u6413) LangChain Python integrations &#8211; Docs by LangChain\u53ef\u4ee5\u5728\u8fd9\u91cc\u9762\u83b7\u53d6 \u521b\u5efa\u5de5\u5177 1.\u5728 LangChain \u4e2d&amp;#xff0c<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[84,997,114,81,427],"topic":[],"class_list":["post-119751","post","type-post","status-publish","format-standard","hentry","category-server","tag-android","tag-langchain","tag-mysql","tag-python","tag-427"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>LangChain \u804a\u5929\u6a21\u578b\u4e2d\u5de5\u5177\u7684\u8c03\u7528\u8be6\u89e3-\u300aHello LangChain LangGraph!\u300b(3) - 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name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/119751.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/119751.html\",\"name\":\"LangChain \u804a\u5929\u6a21\u578b\u4e2d\u5de5\u5177\u7684\u8c03\u7528\u8be6\u89e3-\u300aHello LangChain LangGraph!\u300b(3) - 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\u5b9a\u4e49\u5de5\u5177(\u521b\u5efa\u5de5\u5177)-&gt;\u7ed1\u5b9a\u5de5\u5177-&gt;\u8c03\u7528\u5de5\u5177 LangChain\u63d0\u4f9b\u7684\u73b0\u6210\u7684\u5de5\u5177\u548c\u5de5\u5177\u5305:(\u5de5\u5177\u4e00\u822c\u90fd\u4e0d\u9700\u8981\u81ea\u5df1\u624b\u6413) LangChain Python integrations - Docs by LangChain\u53ef\u4ee5\u5728\u8fd9\u91cc\u9762\u83b7\u53d6 \u521b\u5efa\u5de5\u5177 1.\u5728 LangChain \u4e2d&amp;#xff0c","og_url":"https:\/\/www.wsisp.com\/helps\/119751.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2026-10-30T01:48:28+00:00","author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"3 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/119751.html","url":"https:\/\/www.wsisp.com\/helps\/119751.html","name":"LangChain 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