{"id":7374,"date":"2024-08-06T15:32:32","date_gmt":"2024-08-06T07:32:32","guid":{"rendered":"https:\/\/aict.nkust.edu.tw\/digitrans\/?p=7374"},"modified":"2024-12-13T21:12:24","modified_gmt":"2024-12-13T13:12:24","slug":"langchain-%e8%88%87-langgraph-%e4%b8%b2%e6%b5%81%e6%8a%80%e8%a1%93%e6%b7%b1%e5%ba%a6%e6%8e%a2%e7%b4%a2","status":"publish","type":"post","link":"https:\/\/aict.nkust.edu.tw\/digitrans\/?p=7374","title":{"rendered":"LangChain \u8207 LangGraph \u4e32\u6d41\u6280\u8853\u6df1\u5ea6\u63a2\u7d22"},"content":{"rendered":"\n<p>2024-08 |hengshiousheu<\/p>\n\n\n\n<p>\u6458\u8981<br>\u5c55\u793a\u4e86 LangChain \u8207 LangGraph \u7684\u4e32\u6d41\u529f\u80fd\uff0c\u65e8\u5728\u8aaa\u660e\u5982\u4f55\u4ee5\u5206\u6bb5\u5f0f\u8f38\u51fa\u548c\u4e8b\u4ef6\u4e32\u6d41\u7684\u65b9\u5f0f\u63d0\u5347\u57fa\u65bc\u5927\u578b\u8a9e\u8a00\u6a21\u578b (LLM) \u61c9\u7528\u7a0b\u5f0f\u7684\u6548\u80fd\u3002\u9996\u5148\uff0c\u5b83\u4ecb\u7d39\u4e86 LangChain \u7684 stream \u548c astream \u65b9\u6cd5\uff0c\u4e26\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528 StrOutputParser \u89e3\u6790\u5668\u4f86\u8655\u7406\u5206\u6bb5\u5f0f\u7684 LLM \u8f38\u51fa\u3002\u63a5\u8457\uff0c\u5b83\u6df1\u5165\u63a2\u8a0e\u4e86 LangGraph \u7684\u4e32\u6d41\u6a21\u5f0f\uff0c\u5305\u62ec values \u548c updates \u6a21\u5f0f\uff0c\u4e26\u5c55\u793a\u4e86\u5982\u4f55\u5f9e\u6700\u7d42\u7bc0\u9ede\u4e32\u6d41 LLM \u6a19\u8a18\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u591a\u7a2e\u4e32\u6d41\u6a21\u5f0f\u9032\u884c\u914d\u7f6e\u3002\u6b64\u5916\uff0c\u5b83\u4e5f\u4ecb\u7d39\u4e86 LangChain \u7684\u4e8b\u4ef6\u4e32\u6d41 API\uff0c\u4e26\u8aaa\u660e\u5982\u4f55\u900f\u904e\u904e\u6ffe\u4e8b\u4ef6\u4f86\u512a\u5316\u4e32\u6d41\u8655\u7406\u7684\u6548\u7387\u3002\u7e3d\u9ad4\u800c\u8a00\uff0c\u9019\u6bb5\u7a0b\u5f0f\u78bc\u5f37\u8abf\u4e86\u4e32\u6d41\u6280\u8853\u5728\u6253\u9020\u56de\u61c9\u9748\u654f\u7684 AI \u61c9\u7528\u7a0b\u5f0f\u65b9\u9762\u7684\u91cd\u8981\u6027\uff0c\u4e26\u63d0\u4f9b\u4e86\u5be6\u7528\u7684\u7bc4\u4f8b\u548c\u6280\u5de7\uff0c\u5e6b\u52a9\u4f7f\u7528\u8005\u5145\u5206\u767c\u63ee\u9019\u4e9b\u529f\u80fd\u7684\u6f5b\u529b\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u524d\u8a00<\/h1>\n\n\n\n<p>\u5728\u9019\u500b\u6559\u7a0b\u4e2d\uff0c\u6211\u5011\u5c07\u6df1\u5165\u63a2\u8a0e LangChain \u548c LangGraph \u7684\u4e32\u6d41\uff08Streaming\uff09\u529f\u80fd\uff0c\u9019\u5c0d\u65bc\u6253\u9020\u53cd\u61c9\u9748\u654f\u7684 AI \u61c9\u7528\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6307\u5357\u5047\u8a2d\u60a8\u5df2\u719f\u6089\u4ee5\u4e0b\u6982\u5ff5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u804a\u5929\u6a21\u578b\uff08Chat models\uff09<\/li>\n\n\n\n<li>LangChain \u8868\u9054\u8a9e\u8a00\uff08LangChain Expression Language\uff09<\/li>\n\n\n\n<li>\u8f38\u51fa\u89e3\u6790\u5668\uff08Output parsers\uff09<\/li>\n<\/ul>\n\n\n\n<p>\u4e0d\u719f\u6089\u7684\u8a71\uff0c\u4e0b\u9762\u6559\u7a0b\u70ba\u624b\u628a\u624b\u5e36\u4f60\u57f7\u884c\u8207\u64cd\u4f5c\u4e32\u6d41\u7684\u91cd\u8981\u6027\uff0c\u672c\u7bc7\u5167\u5bb9\u7de8\u6392\u65b9\u5f0f\u70ba\u5148\u884c\u4ecb\u7d39 LangChain \u7684\u4f7f\u7528\u65b9\u6cd5\u5f8c\u5728\u5957\u5165 LangGraph \u7576\u4e2d\u505a\u4f7f\u7528\u3002\u8aa0\u5982 Day 3 \u4ecb\u7d39\u5230 LangGraph \u70ba LangChain \u5ef6\u4f38\uff0c\u5be6\u52d9\u4e0a\u5f88\u591a\u51fd\u6578\u4ee5\u53ca\u4f7f\u7528\u65b9\u5f0f\u90fd\u662f\u5efa\u7acb\u5728\u958b\u767c\u4eba\u54e1\u5df2\u7d93\u719f\u6089 LangChain \u4e0b\u9032\u884c\u5c55\u958b\u3002<\/p>\n\n\n\n<p><strong>\u672c\u7ae0\u76ee\u9304\u5982\u4e0b\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>LangChain \u74b0\u7bc0\n<ul class=\"wp-block-list\">\n<li><ol><li>\u70ba\u4ec0\u9ebc\u4e32\u6d41\u5982\u6b64\u91cd\u8981\uff1f<\/li><\/ol><ol start=\"2\"><li>\u6df1\u5165\u4e86\u89e3 Chat Model \u7684\u4e92\u52d5\u6a5f\u5236\uff1a<code>invoke()<\/code>\u00a0\u8207\u00a0<code>stream()<\/code>\u00a0\u5dee\u5225<\/li><\/ol>\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u63a2\u7d22\u00a0<code>Stream_Events<\/code>\u00a0\u9ad8\u7d1a\u4e32\u6d41\u6280\u8853<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>LangGraph \u74b0\u7bc0\n<ul class=\"wp-block-list\">\n<li><ol><li>\u591a\u7a2e\u4e32\u6d41\u6a21\u5f0f\u4ecb\u7d39\uff1a<code>values<\/code>\u00a0\u548c\u00a0<code>updates<\/code><\/li><\/ol>\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u6700\u7d42\u7bc0\u9ede\u4e32\u6d41\u5be6\u4f5c<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\"><strong>===LangChain \u74b0\u7bc0===<\/strong><\/h1>\n\n\n\n<h1 class=\"wp-block-heading\">1. \u70ba\u4ec0\u9ebc\u4e32\u6d41\u5982\u6b64\u91cd\u8981\uff1f<\/h1>\n\n\n\n<p>\u5728\u57fa\u65bc\u5927\u578b\u8a9e\u8a00\u6a21\u578b\uff08LLM\uff09\u7684\u61c9\u7528\u4e2d\uff0c\u4e32\u6d41\u6280\u8853\u626e\u6f14\u8457\u8209\u8db3\u8f15\u91cd\u7684\u89d2\u8272\u3002\u5b83\u80fd\u5920\u986f\u8457\u63d0\u5347\u7528\u6236\u9ad4\u9a57\uff0c\u8b93\u61c9\u7528\u611f\u89ba\u66f4\u52a0\u9748\u654f\u548c\u5373\u6642\u3002<\/p>\n\n\n\n<p>LangChain \u4e2d\u7684\u6838\u5fc3\u5143\u7d20\uff0c\u5982\u804a\u5929\u6a21\u578b\u3001\u8f38\u51fa\u89e3\u6790\u5668\u3001\u63d0\u793a\u6a21\u677f\u3001\u6aa2\u7d22\u5668\u548c\u4ee3\u7406\u7b49\uff0c\u90fd\u5be6\u73fe\u4e86 LangChain \u53ef\u904b\u884c\u63a5\u53e3\uff08Runnable Interface\uff09\u3002\u9019\u500b\u63a5\u53e3\u63d0\u4f9b\u4e86\u5169\u7a2e\u4e3b\u8981\u7684\u4e32\u6d41\u65b9\u6cd5\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>sync stream<\/code>\u00a0\u548c\u00a0<code>async astream<\/code>\uff1a\u9019\u662f\u9ed8\u8a8d\u7684\u4e32\u6d41\u5be6\u73fe\uff0c\u7528\u65bc\u4e32\u6d41\u93c8\u689d\u7684\u6700\u7d42\u8f38\u51fa\u3002<\/li>\n\n\n\n<li><code>async astream_events<\/code>\u00a0\u548c\u00a0<code>async astream_log<\/code>\uff1a\u9019\u4e9b\u65b9\u6cd5\u80fd\u5920\u4e32\u6d41\u4e2d\u9593\u6b65\u9a5f\u548c\u6700\u7d42\u8f38\u51fa\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u5169\u7a2e\u65b9\u6cd5\uff0c\u4e26\u5b78\u7fd2\u5982\u4f55\u9748\u6d3b\u904b\u7528\u5b83\u5011\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>[\u6280\u8853\u4eae\u9ede] LangChain \u7684\u4e32\u6d41\u529f\u80fd\u4e0d\u50c5\u63d0\u9ad8\u4e86\u61c9\u7528\u7684\u97ff\u61c9\u901f\u5ea6\uff0c\u9084\u80fd\u8b93\u958b\u767c\u8005\u66f4\u9748\u6d3b\u5730\u8655\u7406\u548c\u5c55\u793a AI \u751f\u6210\u7684\u5167\u5bb9\u3002<\/p>\n<\/blockquote>\n\n\n\n<h1 class=\"wp-block-heading\">2. \u6df1\u5165\u4e86\u89e3 Chat Model \u7684\u4e92\u52d5\u6a5f\u5236<\/h1>\n\n\n\n<p>\u70ba\u4e86\u7c21\u5316\u93c8\u7684\u5275\u5efa\u904e\u7a0b\uff0cLangChain \u5be6\u73fe\u4e86\u4e00\u500b&#8221;\u53ef\u904b\u884c&#8221;\uff08Runnable\uff09\u5354\u8b70\u3002\u8a31\u591a LangChain \u7d44\u4ef6\u90fd\u5be6\u73fe\u4e86\u9019\u500b\u5354\u8b70\uff0c\u5305\u62ec\u804a\u5929\u6a21\u578b\u3001LLM\u3001\u8f38\u51fa\u89e3\u6790\u5668\u3001\u6aa2\u7d22\u5668\u3001\u63d0\u793a\u6a21\u677f\u7b49\u3002<\/p>\n\n\n\n<p>\u9019\u500b\u6a19\u6e96\u63a5\u53e3\u4f7f\u5f97\u5b9a\u7fa9\u548c\u8abf\u7528\u81ea\u5b9a\u7fa9\u93c8\u8b8a\u5f97\u7c21\u55ae\u76f4\u63a5\u3002\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>invoke<\/code>\uff1a\u5c0d\u8f38\u5165\u8abf\u7528\u93c8<\/li>\n\n\n\n<li><code>stream<\/code>\uff1a\u4e32\u6d41\u56de\u61c9\u7684\u7247\u6bb5<\/li>\n\n\n\n<li><code>batch<\/code>\uff1a\u5c0d\u8f38\u5165\u5217\u8868\u8abf\u7528\u93c8<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u6709\u7684 Runnable \u7269\u4ef6\u90fd\u5be6\u4f5c\u4e86\u4e00\u500b\u540c\u6b65\u65b9\u6cd5&nbsp;<code>stream<\/code>&nbsp;\u548c\u4e00\u500b\u7570\u6b65\u65b9\u6cd5&nbsp;<code>astream<\/code>\u3002<\/p>\n\n\n\n<p>\u9019\u4e9b\u65b9\u6cd5\u65e8\u5728\u4ee5\u5206\u584a(Chunk)\u5f62\u5f0f\u4e32\u6d41\u6700\u7d42\u8f38\u51fa\uff0c\u4e26\u5728\u6bcf\u500b\u584a\u53ef\u7528\u6642\u7acb\u5373\u751f\u6210\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.1 invoke\uff1a\u540c\u6b65\u8abf\u7528\u65b9\u6cd5\u89e3\u6790<\/h2>\n\n\n\n<p><code>invoke()<\/code>&nbsp;\u65b9\u6cd5\u662f\u6700\u76f4\u63a5\u7684\u4f7f\u7528\u65b9\u5f0f\uff0c\u6703\u5728\u6a21\u578b\u751f\u6210\u5b8c\u6574\u56de\u61c9\u5f8c\u624d\u8fd4\u56de\u5b8c\u6574\u7d50\u679c\u3002\u8b93\u6211\u5011\u770b\u4e00\u500b\u5be6\u969b\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain_openai import ChatOpenAI\nmodel = ChatOpenAI()\nmodel.invoke(\"\u8acb\u4f60\u8b1b\u4e00\u500b\u65e9\u5b89\u554f\u5019\u8a9e\")\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/0hKmFOD.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>[\u6280\u8853\u8aaa\u660e] invoke() \u65b9\u6cd5\u9069\u7528\u65bc\u5c0d\u5be6\u6642\u6027\u8981\u6c42\u4e0d\u9ad8\u7684\u5834\u666f\uff0c\u6216\u7576\u60a8\u9700\u8981\u4e00\u6b21\u6027\u7372\u53d6\u5b8c\u6574\u56de\u61c9\u6642\u4f7f\u7528\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">2.2 Stream\uff1a\u4e32\u6d41\u65b9\u6cd5\u7684\u9b45\u529b<\/h2>\n\n\n\n<p>\u76f8\u6bd4\u4e4b\u4e0b\uff0cstream() \u65b9\u6cd5\u5141\u8a31\u6211\u5011\u5728\u751f\u6210\u904e\u7a0b\u4e2d\u9010\u6b65\u7372\u53d6\u56de\u61c9\uff0c\u9019\u5c0d\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u81f3\u95dc\u91cd\u8981\u3002<code>stream()<\/code>&nbsp;\u65b9\u6cd5\u8fd4\u56de\u4e00\u500b\u751f\u6210\u5668\uff0c\u80fd\u5920\u5728\u751f\u6210\u904e\u7a0b\u4e2d\u9010\u6b65\u7522\u751f token\u3002<\/p>\n\n\n\n<p>\u4e32\u6d41\u8655\u7406\u7684\u5be6\u73fe\u9700\u8981\u7a0b\u5e8f\u4e2d\u7684\u6bcf\u500b\u6b65\u9a5f\u90fd\u80fd\u5920\u8655\u7406\u8f38\u5165\u6d41\u3002\u9019\u610f\u5473\u8457\u6bcf\u500b\u7d44\u4ef6\u90fd\u8981\u80fd\u5920\u4e00\u6b21\u8655\u7406\u4e00\u500b\u8f38\u5165\u584a\uff0c\u4e26\u751f\u6210\u76f8\u61c9\u7684\u8f38\u51fa\u584a\u3002\u9019\u7a2e\u8655\u7406\u65b9\u5f0f\u5e36\u4f86\u4e86\u7368\u7279\u7684\u512a\u52e2\u548c\u6311\u6230\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u9023\u7e8c\u6027\u8655\u7406\uff1a\u4e32\u6d41\u5141\u8a31\u7cfb\u7d71\u5728\u63a5\u6536\u5230\u5b8c\u6574\u8f38\u5165\u4e4b\u524d\u5c31\u958b\u59cb\u8655\u7406\u548c\u8f38\u51fa\uff0c\u5927\u5927\u63d0\u9ad8\u4e86\u97ff\u61c9\u901f\u5ea6\u548c\u6548\u7387\u3002<\/li>\n\n\n\n<li>\u8907\u96dc\u5ea6\u8b8a\u5316\uff1a\u4e32\u6d41\u8655\u7406\u7684\u8907\u96dc\u5ea6\u53ef\u80fd\u5dee\u7570\u5f88\u5927\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7c21\u55ae\u4efb\u52d9\uff1a\u5982\u76f4\u63a5\u8f38\u51fa LLM \u751f\u6210\u7684 token\u3002<\/li>\n\n\n\n<li>\u8907\u96dc\u4efb\u52d9\uff1a\u5982\u5728 JSON \u7d50\u679c\u5b8c\u5168\u751f\u6210\u4e4b\u524d\u5c31\u958b\u59cb\u4e32\u6d41\u5176\u90e8\u5206\u5167\u5bb9\u3002<\/li>\n<\/ul>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u9748\u6d3b\u6027\u8207\u6311\u6230\uff1a\u9019\u7a2e\u65b9\u6cd5\u63d0\u4f9b\u4e86\u6975\u5927\u7684\u9748\u6d3b\u6027\uff0c\u4f46\u4e5f\u5e36\u4f86\u4e86\u7de8\u7a0b\u4e0a\u7684\u6311\u6230\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u7d50\u69cb\u5316\u6578\u64da\u6216\u9700\u8981\u6574\u9ad4\u4e0a\u4e0b\u6587\u7684\u4efb\u52d9\u6642\u3002<\/li>\n\n\n\n<li>\u6700\u4f73\u8d77\u9ede\uff1a\u8981\u958b\u59cb\u63a2\u7d22\u4e32\u6d41\u6280\u8853\uff0c\u6700\u597d\u7684\u5207\u5165\u9ede\u5c31\u662f LLM \u61c9\u7528\u4e2d\u6700\u6838\u5fc3\u7684\u7d44\u4ef6\u2014\u2014LLM \u672c\u8eab\u3002\u9019\u662f\u56e0\u70ba LLM \u5929\u751f\u5c31\u9069\u5408token\u7d1a\u5225\u7684\u4e32\u6d41\u8f38\u51fa\u3002<\/li>\n<\/ol>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>[\u6280\u8853\u8981\u9ede] \u4e32\u6d41\u7684\u95dc\u9375\u5728\u65bc\u7a0b\u5e8f\u4e2d\u7684\u6bcf\u500b\u6b65\u9a5f\u90fd\u80fd\u5920\u8655\u7406\u8f38\u5165\u6d41\uff0c\u5373\u4e00\u6b21\u8655\u7406\u4e00\u500b\u8f38\u5165\u584a\uff0c\u4e26\u751f\u6210\u76f8\u61c9\u7684\u8f38\u51fa\u584a\u3002\u5b83\u8981\u6c42\u958b\u767c\u8005\u91cd\u65b0\u601d\u8003\u6578\u64da\u8655\u7406\u6d41\u7a0b\uff0c\u5f9e\u6574\u9ad4\u8655\u7406\u8f49\u5411\u589e\u91cf\u8655\u7406\u3002<\/p>\n<\/blockquote>\n\n\n\n<pre class=\"wp-block-code\"><code>print(model.invoke(\"\u8acb\u4f60\u8b1b\u4e00\u500b\u65e9\u5b89\u554f\u5019\u8a9e\"))\nprint(model.stream(\"\u8acb\u4f60\u8b1b\u4e00\u500b\u65e9\u5b89\u554f\u5019\u8a9e\"))\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/u6Rfz0N.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<p>\u5982\u679c\u60a8\u5728\u7570\u6b65\u74b0\u5883\u4e2d\u5de5\u4f5c\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u7570\u6b65\u7684&nbsp;<code>astream<\/code>&nbsp;API\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>chunks = &#91;]\nasync for chunk in model.astream(\"\u8acb\u4f60\u544a\u8a34\u6211 k8s \u8ddf docker \u5340\u5225\"):\n    chunks.append(chunk)\n    print(chunk.content, end=\"|\", flush=True)\n\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/5q3qPxM.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>[\u5be6\u7528\u6280\u5de7] \u4f7f\u7528 end=&#8221;|&#8221; \u548c flush=True \u53ef\u4ee5\u5be6\u73fe\u5e73\u6ed1\u7684\u8f38\u51fa\u6548\u679c\uff0c\u8b93\u7528\u6236\u611f\u53d7\u5230\u5be6\u6642\u751f\u6210\u7684\u904e\u7a0b\u3002<\/p>\n<\/blockquote>\n\n\n\n<pre class=\"wp-block-code\"><code>chunks&#91;1]\nchunks&#91;2]\nchunks&#91;1] + chunks&#91;2]\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/t3oU8fA.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>[\u6ce8\u610f] \u6211\u5011\u5f97\u5230\u7684\u662f&nbsp;<code>AIMessageChunk<\/code>&nbsp;\u5c0d\u8c61\u3002\u9019\u4e9b\u584a\u5728\u8a2d\u8a08\u4e0a\u662f\u53ef\u7d2f\u52a0\u7684\u2014\u2014\u53ea\u9700\u7c21\u55ae\u5730\u5c07\u5b83\u5011\u76f8\u52a0\uff0c\u5c31\u80fd\u5f97\u5230\u5230\u76ee\u524d\u70ba\u6b62\u7684\u5b8c\u6574\u97ff\u61c9\u72c0\u614b\uff01<\/p>\n<\/blockquote>\n\n\n\n<pre class=\"wp-block-code\"><code>for chunk in model.stream(\"\u5beb\u4e00\u9996\u95dc\u65bc k8s \u7684\u5152\u6b4c\"):\n    print(chunk.content, end=\"\", flush=True)\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/lV0LYPH.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">2.3 \u7d50\u5408 LangChain \u8868\u9054\u8a9e\u8a00\u5be6\u73fe\u6301\u7e8c\u4e32\u6d41\u56de\u61c9<\/h2>\n\n\n\n<p>\u73fe\u5728\uff0c\u8b93\u6211\u5011\u5c07 Prompt\u3001Model \u548c OutputParser \u7d50\u5408\u8d77\u4f86\uff0c\u9a57\u8b49\u4e32\u6d41\u6548\u679c\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>[\u6280\u8853\u7126\u9ede] \u6211\u5011\u5c07\u4f7f\u7528 StrOutputParser \u4f86\u89e3\u6790\u6a21\u578b\u7684\u8f38\u51fa\u3002\u9019\u662f\u4e00\u500b\u7c21\u55ae\u7684\u89e3\u6790\u5668\uff0c\u5b83\u5f9e AIMessageChunk \u4e2d\u63d0\u53d6\u5167\u5bb9\u5b57\u6bb5\uff0c\u7d66\u6211\u5011\u6a21\u578b\u8fd4\u56de\u7684 token\u3002<\/p>\n<\/blockquote>\n\n\n\n<pre class=\"wp-block-code\"><code>from langchain_core.output_parsers import StrOutputParser\nfrom langchain_core.prompts import ChatPromptTemplate\n\nprompt = ChatPromptTemplate.from_template(\"\u8b1b\u4e00\u500b\u65e9\u5b89\u554f\u5019\u8a9e\u95dc\u65bc {topic}\")\nparser = StrOutputParser()\nchain = prompt | model | parser\n\nasync for chunk in chain.astream({\"topic\": \"\u7236\u6bcd\u89aa\"}):\n    print(chunk, end=\"|\", flush=True)\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/Tgl9ipy.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>[\u63d0\u793a] LCEL \u662f\u4e00\u7a2e\u8072\u660e\u5f0f\u65b9\u6cd5\uff0c\u7528\u65bc\u901a\u904e\u93c8\u63a5\u4e0d\u540c\u7684 LangChain \u539f\u8a9e\u4f86\u6307\u5b9a&#8221;\u7a0b\u5e8f&#8221;\u3002\u4f7f\u7528 LCEL \u5275\u5efa\u7684\u93c8\u689d\u6703\u81ea\u52d5\u5be6\u73fe stream \u548c astream\uff0c\u5141\u8a31\u4e32\u6d41\u6700\u7d42\u8f38\u51fa\u3002<\/p>\n<\/blockquote>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>StrOutputParser \u7528\u9014\u5c31\u662f\u628a Chunk \u7576\u4e2d content \u63d0\u51fa==<\/p>\n<\/blockquote>\n\n\n\n<h1 class=\"wp-block-heading\">3. \u63a2\u7d22&nbsp;<code>Stream_Events<\/code>&nbsp;\u9ad8\u7d1a\u4e32\u6d41\u6280\u8853<\/h1>\n\n\n\n<p>Event Streaming \u662f\u4e00\u500b beta API\uff0c\u53ef\u80fd\u6703\u6839\u64da\u53cd\u994b\u9032\u884c\u8abf\u6574\u3002\u672c\u6307\u5357\u6f14\u793a\u7684\u662f V2 API\uff0c\u9700\u8981 langchain-core >= 0.2 \u7248\u672c\u3002\u5982\u679c\u8981\u4f7f\u7528 V1 API \u7684\u8a71\u9700\u8981\u53c3\u8003\u820a\u7248 LangChain \u5b98\u65b9\u6587\u4ef6\uff0c\u65b0\u7248\u6587\u4ef6\u5247\u662flangChain v0.2 Concepts\/Streaming \u3002<\/p>\n\n\n\n<p>\u70ba\u4e86\u8b93&nbsp;<code>astream_events<\/code>&nbsp;API \u6b63\u5e38\u5de5\u4f5c\uff0c\u8acb\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u76e1\u53ef\u80fd\u5728\u6574\u500b\u4ee3\u78bc\u4e2d\u4f7f\u7528\u00a0<code>async<\/code>\uff08\u4f8b\u5982\uff0c\u7570\u6b65\u5de5\u5177\u7b49\uff09<\/li>\n\n\n\n<li>\u5728\u5b9a\u7fa9\u81ea\u5b9a\u7fa9\u51fd\u6578 runnalbes \u6642\u50b3\u64ad callbacks<\/li>\n\n\n\n<li>\u7576\u4e0d\u4f7f\u7528 LCEL \u800c\u4f7f\u7528\u53ef\u904b\u884c\u5c0d\u8c61\u6642\uff0c\u78ba\u4fdd\u8abf\u7528 LLM \u7684\u00a0<code>.astream()<\/code>\u00a0\u800c\u4e0d\u662f\u00a0<code>.ainvoke<\/code>\uff0c\u4ee5\u5f37\u5236 LLM \u4e32\u6d41 token<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">3.1 Stream_Events \u4e8b\u4ef6\u53c3\u8003\u6307\u5357<\/h2>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u5404\u7a2e Runnable \u7269\u4ef6 \u53ef\u80fd\u767c\u51fa\u7684\u4e00\u4e9b\u4e8b\u4ef6\u7684\u53c3\u8003\u8868\uff0c\u4e3b\u8981\u6709<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/jW3t0Wg.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>[\u6ce8\u610f] \u7576\u4e32\u6d41\u6b63\u78ba\u5be6\u73fe\u6642\uff0c\u53ef\u904b\u884c\u5c0d\u8c61\u7684\u8f38\u5165\u76f4\u5230\u8f38\u5165\u6d41\u5b8c\u5168\u6d88\u8017\u5f8c\u624d\u80fd\u77e5\u9053\u3002\u9019\u610f\u5473\u8457\u8f38\u5165\u901a\u5e38\u53ea\u5305\u542b\u5728\u7d50\u675f\u4e8b\u4ef6\u4e2d\uff0c\u800c\u4e0d\u662f\u958b\u59cb\u4e8b\u4ef6\u4e2d\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">3.2 \u900f\u904e Chat Model \u4e86\u89e3\u904b\u4f5c\u6a5f\u5236<\/h2>\n\n\n\n<p>\u8b93\u6211\u5011\u4f86\u770b\u770b\u804a\u5929\u6a21\u578b\u7522\u751f\u7684\u4e8b\u4ef6\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>events = &#91;]\nasync for event in model.astream_events(\"\u65e9\u5b89\", version=\"v2\"):\n    events.append(event)\n<\/code><\/pre>\n\n\n\n<p>\u8b93\u6211\u5011\u770b\u770b\u524d\u5e7e\u500b\u4e8b\u4ef6\u548c\u6700\u5f8c\u5e7e\u500b\u4e8b\u4ef6\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/6IyvEN6.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<p>\u53ef\u4ee5\u6ce8\u610f\u5230\u56de\u50b3 Message \u7576\u4e2d\u4e0d\u540c Chunk \u6240\u5728\u7684 event \u662f\u4e0d\u540c\u7684\uff0c\u5f9e\u4e00\u958b\u59cb&nbsp;<code>on_chat_model_start<\/code>,&nbsp;<code>on_chat_model_stream<\/code>, \u5230\u6700\u5f8c&nbsp;<code>on_chat_model_end<\/code><\/p>\n\n\n\n<p>\u6574\u7406\u4e00\u4e0b\uff0c\u53ea\u60f3\u8981\u7684 type \u8b93\u4e32\u6d41\u8f38\u51fa\u65b9\u4fbf\u8b58\u5225\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>async for event in model.astream_events(\"\u65e9\u5b89\", version=\"v2\"):\n    event_type = event&#91;\"event\"]\n    if event_type ==\"on_chat_model_start\":\n        print(\"Streamgin Start\", flush=False)\n    if event_type == \"on_chat_model_stream\":\n        content = event&#91;\"data\"]&#91;\"chunk\"].content\n        if content:\n          #\u8981\u8003\u616e\u4e00\u4e0b\u56de\u50b3\u6c92\u6709\u7684\u60c5\u6cc1\n          print(content, end=\"|\", flush=False)\n    if event_type == \"on_chat_model_end\":\n        print(\"\\nStreamgin End\", flush=False)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">3.3 \u7d50\u5408 Parser \u6574\u7406\u4e32\u6d41\u8f38\u51fa\u683c\u5f0f<\/h2>\n\n\n\n<p>\u8b93\u6211\u5011\u91cd\u65b0\u5be9\u8996\u4f7f\u7528\u4e32\u6d41\u8f38\u51fa\u89e3\u6790\u5668\u7684\u93c8\u7bc4\u4f8b\uff0c\u63a2\u7d22\u4e32\u6d41\u4e8b\u4ef6 API\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>prompt = ChatPromptTemplate.from_template(\"\u8b1b\u4e00\u500b\u65e9\u5b89\u554f\u5019\u8a9e\u95dc\u65bc {topic}\")\nparser = StrOutputParser()\nchain = prompt | model | parser\n\nparser_events = &#91;]\nasync for event in chain.astream_events({\"topic\": \"\u7236\u6bcd\u89aa\"}, version=\"v2\"):\n    parser_events.append(event)\n\n<\/code><\/pre>\n\n\n\n<p>\u8b93\u6211\u5011\u4f86\u89c0\u5bdf\u524d\u516d\u6bd4\u4e8b\u4ef6\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>rich.print(parser_events&#91;:6])\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/eTihf7z.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<p>\u7576\u6211\u5011\u4ed4\u7d30\u6aa2\u8996\u4e8b\u4ef6\u6d41\u7684\u958b\u59cb\u90e8\u5206\u6642\uff0c\u6703\u767c\u73fe\u4e00\u500b\u6709\u8da3\u7684\u73fe\u8c61\uff1a\u51fa\u73fe\u4e86\u4e09\u500b\u4e0d\u540c\u7684\u958b\u59cb\u4e8b\u4ef6\uff0c\u800c\u4e0d\u662f\u9810\u671f\u7684\u5169\u500b\u3002\u9019\u4e09\u500b\u958b\u59cb\u4e8b\u4ef6\u5206\u5225\u5c0d\u61c9\u65bc\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6574\u500b\u93c8\uff08\u6a21\u578b + \u89e3\u6790\u5668\uff09\u7684\u555f\u52d5\u00a0<code>on_chain_start<\/code><\/li>\n\n\n\n<li>\u6a21\u578b\u7684\u521d\u59cb\u5316<\/li>\n\n\n\n<li>\u89e3\u6790\u5668\u7684\u6e96\u5099\u968e\u6bb5\u00a0<code>on_prompt_start<\/code><\/li>\n<\/ol>\n\n\n\n<p>\u9019\u7a2e\u5c64\u6b21\u5316\u7684\u4e8b\u4ef6\u7d50\u69cb\u53cd\u6620\u4e86\u6574\u500b\u8655\u7406\u6d41\u7a0b\u7684\u7d44\u7e54\u65b9\u5f0f\uff0c\u8b93\u6211\u5011\u80fd\u5920\u7cbe\u78ba\u5730\u8ffd\u8e64\u6bcf\u500b\u7d44\u4ef6\u7684\u904b\u4f5c\u72c0\u614b\u3002<\/p>\n\n\n\n<p>\u8b93\u6211\u5011\u901a\u904e\u5be6\u969b\u64cd\u4f5c\u4f86\u63a2\u7d22\u9019\u500b API\uff0c\u7279\u5225\u95dc\u6ce8\u6a21\u578b\u548c\u89e3\u6790\u5668\u7684\u4e32\u6d41\u4e8b\u4ef6\u3002\u70ba\u4e86\u805a\u7126\u65bc\u6838\u5fc3\u904e\u7a0b\uff0c\u6211\u5011\u5c07\u5ffd\u7565<code>\u958b\u59cb\u4e8b\u4ef6<\/code>\u3001<code>\u7d50\u675f\u4e8b\u4ef6<\/code>\u4ee5\u53ca\u6574\u500b\u93c8\u689d\u7684\u4e8b\u4ef6\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>num_events = 0\n\nasync for event in chain.astream_events(\n    {\"topic\": \"\u7236\u6bcd\u89aa\"},\n    version=\"v2\",\n):\n    kind = event&#91;\"event\"]\n    if kind == \"on_chat_model_stream\":\n        print(\n            f\"\u6a21\u578b\u8f38\u51fa chunk: {repr(event&#91;'data']&#91;'chunk'].content)}\",\n            flush=True,\n        )\n    if kind == \"on_parser_stream\":\n        print(f\"\u89e3\u6790\u5668\u8f38\u51fa chunk: {event&#91;'data']&#91;'chunk']}\", flush=True)\n    num_events += 1\n    if num_events &gt; 30:\n        <em># Truncate the output<\/em>\n        print(\"...\")\n        break\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/6ZAxy0W.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<ol class=\"wp-block-list\">\n<li>\u4e8b\u4ef6\u5206\u5c64\uff1a\u9019\u7a2e\u5206\u5c64\u7d50\u69cb\u4f7f\u6211\u5011\u80fd\u5920\u5206\u5225\u76e3\u63a7\u548c\u5206\u6790\u93c8\u3001\u6a21\u578b\u548c\u89e3\u6790\u5668\u7684\u884c\u70ba\u3002<\/li>\n\n\n\n<li>\u5be6\u6642\u8ffd\u8e64\uff1a\u901a\u904e\u89c0\u5bdf\u00a0<code>on_chat_model_stream<\/code>\u00a0\u548c\u00a0<code>on_parser_stream<\/code>\u00a0\u4e8b\u4ef6\uff0c\u6211\u5011\u53ef\u4ee5\u5be6\u6642\u8ddf\u8e64\u751f\u6210\u904e\u7a0b\u548c\u89e3\u6790\u904e\u7a0b\u3002<\/li>\n\n\n\n<li>\u6027\u80fd\u512a\u5316\u6a5f\u6703\uff1a\u9019\u7a2e\u7d30\u7c92\u5ea6\u7684\u4e8b\u4ef6\u6d41\u70ba\u6027\u80fd\u5206\u6790\u548c\u512a\u5316\u63d0\u4f9b\u4e86\u5bf6\u8cb4\u7684\u6578\u64da\u6e90\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">3.4 \u4e32\u6d41\u4e8b\u4ef6\u904e\u6ffe\u6280\u5de7<\/h2>\n\n\n\n<p>\u7531\u65bc\u9019\u500b API \u7522\u751f\u4e86\u5927\u91cf\u4e8b\u4ef6\uff0c\u80fd\u5920\u904e\u6ffe\u4e8b\u4ef6\u8b8a\u5f97\u975e\u5e38\u6709\u7528\u3002\u4f60\u53ef\u4ee5\u6309\u7d44\u4ef6&nbsp;<code>name<\/code>\u3001\u7d44\u4ef6&nbsp;<code>tags<\/code>&nbsp;\u6216\u7d44\u4ef6&nbsp;<code>type<\/code>&nbsp;\u9032\u884c\u904e\u6ffe\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.4.1 \u6309\u985e\u578b(type)\u904e\u6ffe<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>max_events = 0\nasync for event in chain.astream_events(\n    {\"topic\": \"\u7236\u6bcd\u89aa\"},\n    version=\"v2\",\n    include_types=&#91;\"chat_model\"],\n):\n    print(event)\n    max_events += 1\n    if max_events &gt; 10:\n        # Truncate output\n        print(\"...\")\n        break\n\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/6rdgUzf.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>[\u63d0\u793a] \u6ce8\u610f\u4e8b\u4ef6\u540d\u7a31\u901a\u5e38\u662f&nbsp;<code>on_XXX_[start\/stream\/end]<\/code>&nbsp;\u9019\u6a23\u7684\u683c\u5f0f\uff0c\u4f46\u5728\u793a\u4f8b\u4e2d\u53ea\u5beb\u4e86 chat_model\u3002\u9019\u662f\u56e0\u70ba\u5167\u90e8\u904e\u6ffe\u5668\u6703\u63d0\u53d6 XXX \u90e8\u5206\u3002<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">3.4.2 \u7d9c\u5408\u904e\u6ffe\uff1a\u6309\u985e\u578b(type)\u3001\u540d\u7a31(name)\u548c\u6a19\u7c64(tags)<\/h3>\n\n\n\n<p>\u4f60\u4e5f\u53ef\u4ee5\u5c07\u4e09\u8005 by name, by tags, by type \u4e00\u8d77\u6df7\u8457\u4f7f\u7528\uff0c\u9019\u901a\u5e38\u5728\u4e32\u9023\u8f03\u591a Chain \u5834\u5408\u4e0b\u4f7f\u7528\uff0c\u4e0b\u9762\u53ea\u5c55\u793a\u5982\u4f55\u4e1f\u5165\u4f7f\u7528<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>prompt = ChatPromptTemplate.from_template(\"\u8b1b\u4e00\u500b\u65e9\u5b89\u554f\u5019\u8a9e\u95dc\u65bc {topic}\")\nparser = StrOutputParser().with_config({\"run_name\": \"my_str_parser\"})\n\nmax_events = 0\nasync for event in chain.astream_events(\n    {\"topic\": \"\u7236\u6bcd\u89aa\"},\n    version=\"v2\",\n    include_names=&#91;\"OAI_MODEL_GPT3.5\"],\n    include_types=&#91;\"chat_model\", \"prompt\"],\n    include_tags=&#91;\"my_str_parser\"],\n):\n    print(event)\n    max_events += 1\n    if max_events &gt; 10:\n        # Truncate output\n        print(\"...\")\n        break\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/HYvJ8x1.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<h1 class=\"wp-block-heading\">LangChain \u4e32\u6d41\u529f\u80fd\u7d50\u8ad6<\/h1>\n\n\n\n<p>\u901a\u904e\u672c\u5c0f\u7bc0\uff0c\u6211\u5011\u6df1\u5165\u63a2\u8a0e\u4e86 LangChain \u7684\u4e32\u6d41\u529f\u80fd\uff0c\u5f9e\u57fa\u672c\u7684&nbsp;<code>invoke<\/code>&nbsp;\u548c&nbsp;<code>stream<\/code>&nbsp;\u65b9\u6cd5\uff0c\u5230\u66f4\u9ad8\u7d1a\u7684\u4e8b\u4ef6\u4e32\u6d41\u548c\u904e\u6ffe\u6280\u8853\u3002\u9019\u4e9b\u5de5\u5177\u548c\u6280\u5de7\u5c07\u5e6b\u52a9\u4f60\u69cb\u5efa\u66f4\u52a0\u9748\u6d3b\u3001\u9ad8\u6548\u7684 AI \u61c9\u7528\uff0c\u63d0\u4f9b\u66f4\u597d\u7684\u7528\u6236\u9ad4\u9a57\u3002\u8a18\u4f4f\uff0c\u9078\u64c7\u5408\u9069\u7684\u4e32\u6d41\u65b9\u6cd5\u53d6\u6c7a\u65bc\u4f60\u7684\u5177\u9ad4\u9700\u6c42\u548c\u61c9\u7528\u5834\u666f\u3002\u6301\u7e8c\u5be6\u8e10\u548c\u63a2\u7d22\uff0c\u4f60\u5c07\u80fd\u5920\u5145\u5206\u767c\u63ee\u9019\u4e9b\u5f37\u5927\u529f\u80fd\u7684\u6f5b\u529b\uff01<\/p>\n\n\n\n<p>\u95dc\u9375\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e32\u6d41\u6280\u8853\u5c0d\u65bc\u63d0\u5347AI\u61c9\u7528\u7684\u97ff\u61c9\u6027\u81f3\u95dc\u91cd\u8981<\/li>\n\n\n\n<li>LangChain\u63d0\u4f9b\u4e86\u591a\u7a2e\u4e32\u6d41\u65b9\u6cd5\uff0c\u9069\u7528\u65bc\u4e0d\u540c\u5834\u666f<\/li>\n\n\n\n<li>\u4e8b\u4ef6\u4e32\u6d41API\u5141\u8a31\u66f4\u7d30\u7c92\u5ea6\u7684\u63a7\u5236\u548c\u76e3\u63a7<\/li>\n\n\n\n<li>\u5408\u7406\u4f7f\u7528\u904e\u6ffe\u6280\u8853\u53ef\u4ee5\u512a\u5316\u4e32\u6d41\u4e8b\u4ef6\u7684\u8655\u7406\u6548\u7387<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\"><strong>===LangGraph \u74b0\u7bc0===<\/strong><\/h1>\n\n\n\n<h1 class=\"wp-block-heading\">LangGraph \u4e32\u6d41\u61c9\u7528\uff1a\u63a2\u7d22\u9ad8\u6548\u7684\u8cc7\u6599\u8655\u7406\u65b9\u6848<\/h1>\n\n\n\n<p>\u5728\u73fe\u4ee3\u8cc7\u6599\u8655\u7406\u548c\u4eba\u5de5\u667a\u6167\u61c9\u7528\u4e2d\uff0c\u4e32\u6d41\uff08Streaming\uff09\u6280\u8853\u626e\u6f14\u8457\u8d8a\u4f86\u8d8a\u91cd\u8981\u7684\u89d2\u8272\u3002\u5b83\u80fd\u5920\u5be6\u6642\u8655\u7406\u5927\u91cf\u8cc7\u8a0a\uff0c\u63d0\u9ad8\u7cfb\u7d71\u7684\u97ff\u61c9\u901f\u5ea6\u548c\u6548\u7387\u3002\u672c\u5c0f\u7bc0\u5c07\u6df1\u5165\u63a2\u8a0e LangGraph \u63d0\u4f9b\u7684\u4e32\u6d41\u529f\u80fd\uff0c\u70ba\u60a8\u63ed\u793a\u5176\u5f37\u5927\u7684\u61c9\u7528\u6f5b\u529b\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">1. LangGraph \u4e32\u6d41\u6a21\u5f0f\u6982\u89bd<\/h1>\n\n\n\n<p>LangGraph \u652f\u6301\u591a\u7a2e\u4e32\u6d41\u6a21\u5f0f,\u5176\u4e2d\u6700\u4e3b\u8981\u7684\u5169\u7a2e\u662f:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>values<\/code>: \u6b64\u6a21\u5f0f\u6703\u4e32\u6d41\u56de\u5716\u7684\u503c\uff0c\u5373\u6bcf\u500b\u7bc0\u9ede\u8abf\u7528\u5f8c\u5716\u7684\u5b8c\u6574\u72c0\u614b\u3002<\/li>\n\n\n\n<li><code>updates<\/code>: \u6b64\u6a21\u5f0f\u6703\u4e32\u6d41\u56de\u5716\u7684\u66f4\u65b0\uff0c\u5373\u6bcf\u500b\u7bc0\u9ede\u8abf\u7528\u5f8c\u5716\u72c0\u614b\u7684\u8b8a\u5316\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u9019\u4e9b\u6a21\u5f0f\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u9078\u64c7\uff0c\u4ee5\u9069\u61c9\u4e0d\u540c\u7684\u61c9\u7528\u5834\u666f\u548c\u9700\u6c42\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1.1 \u63a2\u7d22 LangGraph \u4e32\u6d41\u6a21\u5f0f\u7684\u5169\u7a2e\u65b9\u6cd5:&nbsp;<code>values()<\/code>&nbsp;\u8207&nbsp;<code>updates()<\/code><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1.1.1 \u6e96\u5099\u5de5\u4f5c\uff1a\u5b9a\u7fa9\u5de5\u5177\u548c\u6a21\u578b<\/h3>\n\n\n\n<p>\u9996\u5148,\u6211\u5011\u9700\u8981\u5b9a\u7fa9\u4e00\u4e9b\u57fa\u672c\u5143\u7d20:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@tool\ndef recommend_night_market_food(preference: Literal&#91;\"\u9e79\u98df\", \"\u751c\u98df\"]):\n    \"\"\"\u63a8\u85a6\u591c\u5e02\u5c0f\u5403\u3002\"\"\"\n    if preference == \"\u9e79\u98df\":\n        return \"\u63a8\u85a6\u4f60\u8a66\u8a66\u9952\u6cb3\u591c\u5e02\u7684\u80e1\u6912\u9905\uff0c\u5916\u76ae\u9165\u8106\u5167\u9921\u591a\u6c41\uff0c\u662f\u53f0\u5317\u77e5\u540d\u5c0f\u5403\uff01\"\n    elif preference == \"\u751c\u98df\":\n        return \"\u4f86\u4e00\u4efd\u5be7\u590f\u591c\u5e02\u7684\u5713\u4ed4\u51b0\u5982\u4f55\uff1fQ\u5f48\u7684\u6e6f\u5713\u642d\u914d\u6e05\u6dbc\u51b0\u54c1\uff0c\u8d85\u7d1a\u6d88\u6691\uff01\"\n    else:\n        raise AssertionError(\"\u672a\u77e5\u504f\u597d\")\n\n@tool\ndef recommend_bubble_tea(style: Literal&#91;\"\u50b3\u7d71\", \"\u5275\u65b0\"]):\n    \"\"\"\u63a8\u85a6\u624b\u6416\u98f2\u3002\"\"\"\n    if style == \"\u50b3\u7d71\":\n        return \"\u4f60\u4e00\u5b9a\u8981\u54c1\u5690\u4e00\u4e0b\u53f0\u4e2d\u7b2c\u56db\u4fe1\u7528\u5408\u4f5c\u793e\u5c0d\u9762\u7684\u73cd\u73e0\u5976\u8336\uff0c\u9999\u6fc3\u6ed1\u9806\uff0c\u73cd\u73e0\u6709\u56bc\u52c1\uff01\"\n    elif style == \"\u5275\u65b0\":\n        return \"\u8a66\u8a66\u770b\u897f\u9580\u753a\u7684\u828b\u5713\u51b0\u6c99\u62ff\u9435\uff0c\u7d50\u5408\u4e86\u50b3\u7d71\u828b\u5713\u548c\u73fe\u4ee3\u5496\u5561\uff0c\u53e3\u611f\u5c64\u6b21\u8c50\u5bcc\uff01\"\n    else:\n        raise AssertionError(\"\u672a\u77e5\u98a8\u683c\")\n\ntools = &#91;recommend_night_market_food, recommend_bubble_tea]\n\n<\/code><\/pre>\n\n\n\n<p>\u5728\u9019\u500b\u8a2d\u7f6e\u4e2d,\u6211\u5011\u5b9a\u7fa9\u4e86\u5169\u500b\u7c21\u55ae\u7684\u7f8e\u98df\u67e5\u8a62\u5de5\u5177\u548c\u4e00\u500b ChatOpenAI \u6a21\u578b\u3002\u9019\u4e9b\u5143\u7d20\u5c07\u7528\u65bc\u69cb\u5efa\u6211\u5011\u7684 LangGraph \u61c9\u7528\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1.2 \u6cd5\u3127\u3001<code>values()<\/code>\u7bc4\u4f8b<\/h2>\n\n\n\n<p>\u73fe\u5728,\u8b93\u6211\u5011\u770b\u770b\u5982\u4f55\u4f7f\u7528&nbsp;<code>values<\/code>&nbsp;\u6a21\u5f0f\u9032\u884c\u4e32\u6d41:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\ninputs = {\"messages\": &#91;(\"human\", \"\u6211\u60f3\u5403\u591c\u5e02\u7684\u5c0f\u5403\uff0c\u6709\u4ec0\u9ebc\u63a8\u85a6\u55ce\uff1f\")]}\nasync for chunk in graph.astream(inputs, stream_mode=\"values\"):\n    #\u986f\u793a\u6700\u65b0\u8a0a\u606f\u7684\u5167\u5bb9\uff0c\u4e26\u4e14\u6f02\u4eae\u986f\u793a\u51fa\n    chunk&#91;\"messages\"]&#91;-1].pretty_print()\n\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/OMa1KVs.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<p>\u9019\u6bb5\u7a0b\u5f0f\u78bc\u5c07\u5be6\u6642\u986f\u793a\u5716\u7684\u5b8c\u6574\u72c0\u614b,\u8b93\u60a8\u80fd\u5920\u89c0\u5bdf\u5230\u6574\u500b\u8655\u7406\u904e\u7a0b\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u63d0\u9192\uff1a\u5982\u679c\u53ea\u60f3\u62ff\u5230\u6700\u5f8c Agent \u751f\u6210\u7684\u7d50\u679c\uff0c\u5728\u76f8\u540c\u6a21\u5f0f\u4e0b\u53ea\u8981\u7372\u53d6\u6700\u65b0\u4e5f\u5c31\u662f\u6700\u5f8c\u4e00\u500b chunk \u5c31\u53ef\u4ee5\u4e86\u5466<\/p>\n<\/blockquote>\n\n\n\n<pre class=\"wp-block-code\"><code>inputs = {\"messages\": &#91;(\"human\", \"\u6709\u4ec0\u9ebc\u624b\u6416\u98f2\u63a8\u85a6\u55ce\uff1f\")]}\nasync for chunk in graph.astream(inputs, stream_mode=\"values\"):\n    final_result = chunk\n\nfinal_result&#91;\"messages\"]&#91;-1].pretty_print()\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/Mr164WP.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">1.3 \u6cd5\u4e8c\u3001<code>updates()<\/code>\u7bc4\u4f8b<\/h2>\n\n\n\n<p>\u9664\u4e86\u7372\u53d6\u5b8c\u6574\u72c0\u614b,\u6211\u5011\u9084\u53ef\u4ee5\u95dc\u6ce8\u7bc0\u9ede\u72c0\u614b\u7684\u8b8a\u5316:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>inputs = {\"messages\": &#91;(\"human\", \"\u6211\u60f3\u559d\u591c\u5e02\u7684\u7279\u8272\u98f2\u6599\uff0c\u8a72\u53bb\u54ea\u88e1\uff1f\")]}\nasync for chunk in graph.astream(inputs, stream_mode=\"updates\"):\n    for node, values in chunk.items():\n        print(f\"\u63a5\u6536\u4f86\u81ea\u7bc0\u9ede '{node}' \u7684\u66f4\u65b0:\")\n        values&#91;\"messages\"]&#91;-1].pretty_print()\n        # print(values)\n        # print(\"\\n\\n\")\n\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/KaZYpiI.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<p>\u9019\u7a2e\u65b9\u6cd5\u8b93\u60a8\u80fd\u5920\u7cbe\u78ba\u5730\u8ffd\u8e2a\u6bcf\u500b\u7bc0\u9ede\u7684\u8b8a\u5316,\u5c0d\u65bc\u8abf\u8a66\u548c\u512a\u5316\u975e\u5e38\u6709\u7528\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u63d0\u793a\uff1a\u53ef\u4ee5\u6ce8\u610f\u5230&nbsp;<code>values<\/code>&nbsp;\u8207&nbsp;<code>updates<\/code>&nbsp;\u5169\u8005\u5728\u4f7f\u7528\u4e0a\u7684\u5dee\u7570\u3002\u60f3\u8981\u77e5\u9053 Message \u7684\u72c0\u614b\u7684\u8a71\u9078&nbsp;<code>values<\/code>\uff0c\u60f3\u8981\u95dc\u6ce8\u6bcf\u500b\u7bc0\u9ede\u7684\u72c0\u614b\u7684\u8a71\uff0c\u9078\u64c7&nbsp;<code>updates<\/code><\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">1.4 \u591a\u6a21\u5f0f\u4e32\u6d41\u914d\u7f6e\u793a\u4f8b<\/h2>\n\n\n\n<p>\u82e5\u60f3\u8981\u540c\u6642\u53d6\u5f97\u7684\u8a71\uff0c\u76f4\u63a5\u5728 astream() \u7576\u4e2d\u7684 stream_mode \u7576\u4e2d\u586b\u5165\u5373\u53ef<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>inputs = {\"messages\": &#91;(\"human\", \"\u8acb\u63a8\u85a6\u4e00\u500b\u591c\u5e02\u7684\u5c0f\u5403\u548c\u4e00\u500b\u98f2\u6599\")]}\nasync for event, chunk in graph.astream(inputs, stream_mode=&#91;\"values\", \"updates\", \"debug\"]):\n    print(f\"\u63a5\u6536\u65b0\u7684\u4e8b\u4ef6\u985e\u578b: {event}...\")\n    print(chunk)\n    print(\"\\n\\n\")\n\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/2Y50wib.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<p>\u9019\u7a2e\u591a\u6a21\u5f0f\u914d\u7f6e\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u5168\u65b9\u4f4d\u7684\u6578\u64da\u6d1e\u5bdf,\u6709\u52a9\u65bc\u66f4\u6df1\u5165\u5730\u7406\u89e3\u548c\u512a\u5316\u60a8\u7684\u61c9\u7528\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">2. \u5f9e\u6700\u7d42\u7bc0\u9ede\u4e32\u6d41<\/h1>\n\n\n\n<p>\u5728\u8a31\u591a\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u80fd\u53ea\u5c0d\u6700\u7d42\u7d50\u679c\u611f\u8208\u8da3\u3002\u4ee5\u4e0b\u7bc4\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5f9e\u6700\u7d42\u7bc0\u9ede\u4e32\u6d41 LLM token:<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.1 \u5b9a\u7fa9\u6a21\u578b\u548c\u5de5\u5177<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>@tool\ndef recommend_night_market_food(preference: Literal&#91;\"\u9e79\u98df\", \"\u751c\u98df\"]):\n    \"\"\"\u63a8\u85a6\u591c\u5e02\u5c0f\u5403\u3002\"\"\"\n    if preference == \"\u9e79\u98df\":\n        return \"\u63a8\u85a6\u4f60\u8a66\u8a66\u9952\u6cb3\u591c\u5e02\u7684\u80e1\u6912\u9905\uff0c\u5916\u76ae\u9165\u8106\u5167\u9921\u591a\u6c41\uff0c\u662f\u53f0\u5317\u77e5\u540d\u5c0f\u5403\uff01\"\n    elif preference == \"\u751c\u98df\":\n        return \"\u4f86\u4e00\u4efd\u5be7\u590f\u591c\u5e02\u7684\u5713\u4ed4\u51b0\u5982\u4f55\uff1fQ\u5f48\u7684\u6e6f\u5713\u642d\u914d\u6e05\u6dbc\u51b0\u54c1\uff0c\u8d85\u7d1a\u6d88\u6691\uff01\"\n    else:\n        raise AssertionError(\"\u672a\u77e5\u504f\u597d\")\n@tool\ndef recommend_bubble_tea(style: Literal&#91;\"\u50b3\u7d71\", \"\u5275\u65b0\"]):\n    \"\"\"\u63a8\u85a6\u624b\u6416\u98f2\u3002\"\"\"\n    if style == \"\u50b3\u7d71\":\n        return \"\u4f60\u4e00\u5b9a\u8981\u54c1\u5690\u4e00\u4e0b\u53f0\u4e2d\u7b2c\u56db\u4fe1\u7528\u5408\u4f5c\u793e\u5c0d\u9762\u7684\u73cd\u73e0\u5976\u8336\uff0c\u9999\u6fc3\u6ed1\u9806\uff0c\u73cd\u73e0\u6709\u56bc\u52c1\uff01\"\n    elif style == \"\u5275\u65b0\":\n        return \"\u8a66\u8a66\u770b\u897f\u9580\u753a\u7684\u828b\u5713\u51b0\u6c99\u62ff\u9435\uff0c\u7d50\u5408\u4e86\u50b3\u7d71\u828b\u5713\u548c\u73fe\u4ee3\u5496\u5561\uff0c\u53e3\u611f\u5c64\u6b21\u8c50\u5bcc\uff01\"\n    else:\n        raise AssertionError(\"\u672a\u77e5\u98a8\u683c\")\n\ntools = &#91;recommend_night_market_food, recommend_bubble_tea]\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">2.2 \u5b9a\u7fa9\u7bc0\u9ede\u51fd\u6578<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>def should_continue(state: MessagesState) -&gt; Literal&#91;\"tools\", \"final\"]:\n    messages = state&#91;\"messages\"]\n    last_message = messages&#91;-1]\n    if last_message.tool_calls:\n        return \"tools\"\n    return \"final\"\ndef call_model(state: MessagesState):\n    messages = state&#91;\"messages\"]\n    response = model.invoke(messages)\n    return {\"messages\": &#91;response]}\ndef call_final_model(state: MessagesState):\n    messages = state&#91;\"messages\"]\n    last_ai_message = messages&#91;-1]\n    response = final_model.invoke(\n        &#91;\n            SystemMessage(\"\u7f8e\u98df\u90e8\u843d\u5ba2\u7684\u53e3\u543b\u91cd\u65b0\u8868\u9054\"),\n            HumanMessage(last_ai_message.content),\n        ]\n    )\n    response.id = last_ai_message.id\n    return {\"messages\": &#91;response]}\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">2.3 \u7de8\u8b6f\u5716\u4e4b\u5f8c\uff0c\u67e5\u770b\u7d50\u69cb<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>workflow = StateGraph(MessagesState)\nworkflow.add_node(\"agent\", call_model)\nworkflow.add_node(\"tools\", tool_node)\nworkflow.add_node(\"final\", call_final_model)\nworkflow.add_edge(START, \"agent\")\nworkflow.add_conditional_edges(\n    \"agent\",\n    should_continue,\n)\nworkflow.add_edge(\"tools\", \"agent\")\nworkflow.add_edge(\"final\", END)\napp = workflow.compile()\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/6G3KhFe.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">2.4 \u7372\u53d6\u4e32\u6d41\u8f38\u51fa<\/h2>\n\n\n\n<p>\u7136\u5f8c\uff0c\u6211\u5011\u53ef\u4ee5\u5f9e\u6700\u7d42\u7bc0\u9ede\u7372\u53d6\u4e32\u6d41\u8f38\u51fa\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>inputs = {\"messages\": &#91;(\"human\", \"\u8acb\u63a8\u85a6\u4e00\u6b3e\u50b3\u7d71\u624b\u6416\u98f2\")]}\nasync for chunk in app.astream(inputs, stream_mode=\"values\"):\n    #\u986f\u793a\u6700\u65b0\u8a0a\u606f\u7684\u5167\u5bb9\uff0c\u4e26\u4e14\u6f02\u4eae\u986f\u793a\u51fa\n    chunk&#91;\"messages\"]&#91;-1].pretty_print()\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.imgur.com\/PdrJ9S1.png?w=640&#038;ssl=1\" alt=\"img\"\/><\/figure>\n<\/div>\n\n\n<h1 class=\"wp-block-heading\">\u7d50\u8ad6<\/h1>\n\n\n\n<p>\u901a\u904e\u672c\u6559\u7a0b\uff0c\u6211\u5011\u6df1\u5165\u63a2\u8a0e\u4e86 LangChain \u548c LangGraph \u7684\u4e32\u6d41\u529f\u80fd\uff0c\u5f9e\u57fa\u672c\u7684 invoke \u548c stream \u65b9\u6cd5\uff0c\u5230\u66f4\u9ad8\u7d1a\u7684\u4e8b\u4ef6\u4e32\u6d41\u548c\u904e\u6ffe\u6280\u8853\u3002\u9019\u4e9b\u5de5\u5177\u548c\u6280\u5de7\u5c07\u5e6b\u52a9\u4f60\u69cb\u5efa\u66f4\u52a0\u9748\u6d3b\u3001\u9ad8\u6548\u7684 AI \u61c9\u7528\uff0c\u63d0\u4f9b\u5353\u8d8a\u7684\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n\n\n\n<p>\u95dc\u9375\u7cbe\u83ef\uff1a<\/p>\n\n\n\n<p>\u9078\u64c7\u9069\u7576\u7684\u4e32\u6d41\u6a21\u5f0f\uff08values \u6216 updates\uff09\u53ef\u4ee5\u6839\u64da\u9700\u6c42\u7372\u53d6\u4e0d\u540c\u5c64\u9762\u7684\u4fe1\u606f <\/p>\n\n\n\n<p>\u4e32\u6d41\u6280\u8853\u5c0d\u65bc\u63d0\u5347 AI \u61c9\u7528\u7684\u97ff\u61c9\u6027\u81f3\u95dc\u91cd\u8981<\/p>\n\n\n\n<p>LangChain \u548c LangGraph \u63d0\u4f9b\u4e86\u591a\u7a2e\u4e32\u6d41\u65b9\u6cd5\uff0c\u9069\u7528\u65bc\u4e0d\u540c\u5834\u666f<\/p>\n\n\n\n<p>\u4e8b\u4ef6\u4e32\u6d41 API \u5141\u8a31\u66f4\u7d30\u7c92\u5ea6\u7684\u63a7\u5236\u548c\u76e3\u63a7<\/p>\n\n\n\n<p>\u5408\u7406\u4f7f\u7528\u904e\u6ffe\u6280\u8853\u53ef\u4ee5\u512a\u5316\u4e32\u6d41\u4e8b\u4ef6\u7684\u8655\u7406\u6548\u7387<\/p>\n\n\n\n<p>\u8cc7\u6599\u4f86\u6e90: <a href=\"https:\/\/ithelp.ithome.com.tw\/m\/articles\/10347147\">https:\/\/ithelp.ithome.com.tw\/m\/articles\/10347147<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>2024-08 |hengshiousheu \u6458\u8981\u5c55\u793a\u4e86 LangChain \u8207 LangGraph \u7684\u4e32\u6d41\u529f\u80fd\uff0c\u65e8\u5728\u8aaa\u660e\u5982\u4f55\u4ee5\u5206\u6bb5\u5f0f\u8f38\u51fa\u548c\u4e8b\u4ef6\u4e32\u6d41\u7684\u65b9\u5f0f\u63d0\u5347\u57fa\u65bc\u5927\u578b\u8a9e\u8a00\u6a21\u578b 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