{"id":7370,"date":"2024-06-17T15:21:42","date_gmt":"2024-06-17T07:21:42","guid":{"rendered":"https:\/\/aict.nkust.edu.tw\/digitrans\/?p=7370"},"modified":"2024-12-13T21:12:07","modified_gmt":"2024-12-13T13:12:07","slug":"langchain-%e7%9a%84-langgraph-%e7%b0%a1%e5%96%ae%e8%a7%a3%e9%87%8b","status":"publish","type":"post","link":"https:\/\/aict.nkust.edu.tw\/digitrans\/?p=7370","title":{"rendered":"LangChain \u7684 LangGraph \u7c21\u55ae\u89e3\u91cb"},"content":{"rendered":"\n<p>2024-06-17 | Cobus Greyling<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"69dd\">\u4ecb\u7d39<\/h1>\n\n\n\n<p id=\"2d84\">\u70ba\u4ec0\u9ebc\u6211\u5011\u8981\u56de\u5230\u72c0\u614b\u548c\u72c0\u614b\u8f49\u63db\u63a7\u5236\uff1f\u6211\u4ee5\u70ba\u96a8\u8457\u81ea\u4e3bAI\u4ee3\u7406\u7684\u51fa\u73fe\uff0c\u6211\u5011\u5df2\u7d93\u8d85\u8d8a\u4e86\u72c0\u614b\u63a7\u5236\u548c\u8f49\u63db\u7684\u6982\u5ff5\uff1f<\/p>\n\n\n\n<p>\u5176\u5be6\uff0c\u5982\u679c\u4f60\u89c0\u5bdf\u81ea\u4e3b\u4ee3\u7406\u7684\u8f38\u51fa\uff0c\u4f60\u6703\u6ce8\u610f\u5230\u4ee3\u7406\u6703\u5373\u6642\u5275\u5efa\u4e00\u7cfb\u5217\u7684\u884c\u52d5\uff0c\u4e26\u4f9d\u7167\u9019\u4e9b\u884c\u52d5\u57f7\u884c\u3002<\/p>\n\n\n\n<p>LangGraph \u7684\u76ee\u7684\u662f\u5728\u57f7\u884c\u81ea\u4e3bAI\u4ee3\u7406\u6642\u63d0\u4f9b\u4e00\u5b9a\u7a0b\u5ea6\u7684\u63a7\u5236\u3002<\/p>\n\n\n\n<p id=\"0d47\">\u62b1\u6b49\u9019\u7bc7\u6587\u7ae0\u6709\u9ede\u9577\uff0c\u4f46\u6211\u771f\u7684\u60f3\u6df1\u5165\u4e86\u89e3\u5716\u4f5c\u70ba\u6578\u64da\u985e\u578b\u7684\u57fa\u672c\u539f\u5247\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"5d52\">\u73fe\u72c0<\/h1>\n\n\n\n<p id=\"287a\">\u8003\u616e\u4e0b\u65b9\u7684\u5716\u7247\uff0c\u9019\u662f\u6211\u5011\u5927\u591a\u6578\u4eba\u6240\u719f\u6089\u7684\u7528\u65bc\u5275\u5efa\u5c0d\u8a71\u548c\u6d41\u7a0b\u6d41\u7684\u8a2d\u8a08\u8207\u958b\u767c\u7528\u6236\u754c\u9762\u3002<\/p>\n\n\n\n<p>\u8a2d\u8a08\u7684\u555f\u767c\u53ef\u4ee5\u5206\u70ba\u5169\u500b\u4e3b\u8981\u985e\u5225\uff1a<strong>\u7bc0\u9ede<\/strong>\u548c<strong>\u908a<\/strong>\u3002<\/p>\n\n\n\n<p id=\"b125\"><strong>\u7bc0\u9ede<\/strong>\u662f\u69cb\u6210\u754c\u9762\u7684\u5340\u584a\uff0c\u6709\u6642\u88ab\u7a31\u70ba\u8cc7\u7522\u3002\u5728\u4e0b\u65b9\u7684\u5716\u7247\u4e2d\uff0c\u8a2d\u8a08\u756b\u5e03\u4e0a\u6709\u4e94\u500b\u7bc0\u9ede\u3002\u6bcf\u500b\u7bc0\u9ede\u4e4b\u9593\u90fd\u6709\u9023\u7d50\uff0c\u9019\u4e9b\u9023\u7d50\u7a31\u70ba<strong>\u908a<\/strong>\u3002\u908a\u8868\u793a\u53ef\u80fd\u7684\u76ee\u6a19\u7bc0\u9ede\u6216\u591a\u500b\u76ee\u6a19\u7bc0\u9ede\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\/miro.medium.com\/v2\/resize%3Afit%3A1250\/1%2AmJVkPwxV3dlu4RLvqQUiQg.png?w=640&#038;ssl=1\" alt=\"\"\/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"dd33\">\u63d0\u793a\u9023\u7d50<\/h2>\n\n\n\n<p id=\"d0b8\">\u96a8\u8457\u5927\u578b\u8a9e\u8a00\u6a21\u578b\u7684\u51fa\u73fe\uff0c\u63d0\u793a\u93c8\u51fa\u73fe\u4e86\u2026<\/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\/miro.medium.com\/v2\/resize%3Afit%3A1250\/1%2AJ4Kohcy8hGNGDDy5sB6kKA.jpeg?w=640&#038;ssl=1\" alt=\"\"\/><\/figure>\n<\/div>\n\n\n<p id=\"3aa3\">\u63d0\u793a\u93c8\u63a5\u662f\u4e00\u7a2e\u5728\u4f7f\u7528\u8a9e\u8a00\u6a21\u578b\u6642\u7684\u6280\u8853\uff0c\u900f\u904e\u5c07\u591a\u500b\u63d0\u793a\uff08\u7bc0\u9ede\uff09\u4f9d\u5e8f\u9023\u63a5\uff08\u900f\u904e\u908a\uff09\u5728\u4e00\u8d77\uff0c\u5f15\u5c0e\u751f\u6210\u61c9\u7528\u7a0b\u5f0f\u5b8c\u6210\u4e00\u7cfb\u5217\u76f8\u95dc\u7684\u4efb\u52d9\u6216\u6b65\u9a5f\u3002<\/p>\n\n\n\n<p>\u6b64\u65b9\u6cd5\u900f\u904e\u5c07\u5927\u578b\u4efb\u52d9\u5206\u89e3\u70ba\u8f03\u5c0f\u4e14\u6613\u65bc\u7ba1\u7406\u7684\u90e8\u5206\uff0c\u4ee5\u5be6\u73fe\u66f4\u8907\u96dc\u548c\u7d30\u7dfb\u7684\u8f38\u51fa\u3002<\/p>\n\n\n\n<p id=\"4cb3\">\u4ee5\u4e0b\u662f\u63d0\u793a\u93c8\u63a5\u5982\u4f55\u904b\u4f5c\u7684\u7c21\u55ae\u8aaa\u660e\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5206\u89e3\u4efb\u52d9\uff08\u7bc0\u9ede\uff09<\/strong>\uff1a\u8907\u96dc\u7684\u4efb\u52d9\u88ab\u5206\u6210\u66f4\u5c0f\u7684\u3001\u9023\u7e8c\u7684\u6b65\u9a5f\u3002\u6bcf\u500b\u6b65\u9a5f\u90fd\u662f\u70ba\u4e86\u5be6\u73fe\u7e3d\u9ad4\u76ee\u6a19\u7684\u7279\u5b9a\u90e8\u5206\u3002<\/li>\n\n\n\n<li><strong>\u70ba\u6bcf\u500b\u6b65\u9a5f\u5efa\u7acb\u63d0\u793a\uff08\u908a\u7de3\uff09<\/strong>\uff1a\u5c0d\u65bc\u6bcf\u500b\u6b65\u9a5f\uff0c\u90fd\u6703\u8a2d\u8a08\u4e00\u500b\u7279\u5b9a\u7684\u63d0\u793a\u4f86\u6307\u5c0e\u8a9e\u8a00\u6a21\u578b\u7522\u751f\u6240\u9700\u7684\u8f38\u51fa\u3002\u9019\u4e9b\u63d0\u793a\u65e8\u5728\u660e\u78ba\u4e26\u5c08\u6ce8\u65bc\u5404\u81ea\u7684\u5b50\u4efb\u52d9\u3002<\/li>\n\n\n\n<li><strong>\u9806\u5e8f\u57f7\u884c<\/strong>\uff1a\u8a9e\u8a00\u6a21\u578b\u8655\u7406\u7b2c\u4e00\u500b\u63d0\u793a\u4e26\u7522\u751f\u8f38\u51fa\u3002\u7136\u5f8c\uff0c\u8a72\u8f38\u51fa\u5c07\u7528\u4f5c\u5e8f\u5217\u4e2d\u4e0b\u4e00\u500b\u63d0\u793a\u7684\u8f38\u5165\u7684\u4e00\u90e8\u5206\u3002<\/li>\n<\/ol>\n\n\n\n<p id=\"3733\">\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u63d0\u793a\u93c8\u63a5\u57fa\u65bc\u8207\u804a\u5929\u6a5f\u5668\u4eba\u6d41\u7a0b\u69cb\u5efa\u76f8\u540c\u7684\u539f\u7406\u3002\u56e0\u6b64\uff0c\u6211\u5011\u9762\u81e8\u8207\u4e4b\u524d\u76f8\u540c\u7684\u554f\u984c\uff0c\u5373\u50f5\u5316\u7684\u72c0\u614b\u6a5f\u3002<\/p>\n\n\n\n<p id=\"de28\">\u78ba\u5be6\uff0c\u63d0\u793a\u93c8\u63a5\u7684\u67d0\u4e9b\u65b9\u9762\u5728\u6bcf\u500b\u7bc0\u9ede\u7684\u8f38\u5165\u4e0a\u5f15\u5165\u4e86\u4e00\u5b9a\u7a0b\u5ea6\u7684\u9748\u6d3b\u6027\uff0c\u4e26\u5728\u8f38\u51fa\u4e0a\u63d0\u4f9b\u4e86\u52d5\u614b\u8b8a\u5316\u3002\u7136\u800c\uff0c\u6574\u9ad4\u7684\u5e8f\u5217\u4ecd\u7136\u662f\u56fa\u5b9a\u4e14\u50f5\u5316\u7684\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"337a\">\u6311\u6230<\/h2>\n\n\n\n<p id=\"01f1\">\u9019\u7a2e\u65b9\u6cd5\u9700\u8981\u7cbe\u5fc3\u624b\u5de5\u88fd\u4f5c\u6d41\u7a0b\uff0c\u4e26\u4e14\u9700\u8981\u5b9a\u7fa9\u6bcf\u500b\u6c7a\u7b56\u9ede\uff1b\u56e0\u6b64\uff0c\u9019\u672c\u8cea\u4e0a\u662f\u4e00\u500b\u72c0\u614b\u6a5f\uff0c\u5c0d\u8a71\u6a39\u662f\u7531\u4e0d\u540c\u7684\u72c0\u614b\uff08<strong>\u7bc0\u9ede<\/strong>\uff09\u548c\u5c0d\u8a71\u9700\u8981\u6cbf\u908a\u79fb\u52d5\u7684\u6c7a\u7b56\u9ede<strong>\u5b9a\u7fa9<\/strong>\u7684\u3002<\/p>\n\n\n\n<p id=\"87ed\"><strong>\u908a\u7de3<\/strong>\u4e5f\u53ef\u4ee5\u88ab\u8996\u70ba\u53ef\u7528\u65bc\u5c0d\u8a71\u72c0\u614b\/\u5c0d\u8a71\u8f49\u5411\u7684\u9078\u9805\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p id=\"39bd\">\u9019\u7d66\u6211\u5011\u5e36\u4f86\u4e86\u5c0d\u8a71\u8a2d\u8a08\u7684\u6311\u6230\u4e4b\u4e00\uff1b<strong>\u72c0\u614b<\/strong>\u548c<strong>\u6d41\u91cf\u63a7\u5236<\/strong>\u3002<\/p>\n<\/blockquote>\n\n\n\n<p id=\"e3bc\">\u9019\u5c31\u5e36\u51fa\u4e86\u9019\u7a2e\u65b9\u6cd5\u904e\u65bc\u50f5\u5316\u7684\u6311\u6230\uff0c\u901a\u5e38\u6211\u5011\u5e0c\u671b\u6e1b\u5c11\u9019\u7a2e\u50f5\u5316\u6027\uff0c\u4e26\u5f15\u5165\u66f4\u591a\u7684\u9748\u6d3b\u6027\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p id=\"ab44\"><mark>\u6211\u5011\u6240\u77e5\u7684\u50b3\u7d71\u804a\u5929\u6a5f\u5668\u4eba\u5b58\u5728\u8457\u7d50\u69cb\u904e\u591a\u4e14\u904e\u65bc\u50f5\u5316\u7684\u554f\u984c\u3002<\/mark><\/p>\n<\/blockquote>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"9b8c\">\u8f38\u5165\u4ee3\u7406<\/h1>\n\n\n\n<p id=\"c8aa\">\u81ea\u4e3b\u4ee3\u7406\u6700\u8fd1\u88ab\u5f15\u5165\uff0c\u5176\u81ea\u4e3b\u7a0b\u5ea6\u4ee4\u4eba\u9a5a\u5606\u3002\u4ee3\u7406\u5177\u6709\u4e00\u5b9a\u7684\u81ea\u4e3b\u6027\uff0c\u80fd\u5920\u5373\u6642\u5275\u5efa\u4e00\u7cfb\u5217\u4e8b\u4ef6\u7684\u93c8\u6216\u5e8f\u5217\uff0c\u4e26\u9075\u5faa\u5176\u5275\u5efa\u7684\u81e8\u6642\u93c8\u76f4\u5230\u9054\u6210\u554f\u984c\u7684\u6700\u7d42\u7b54\u6848\u3002<\/p>\n\n\n\n<p id=\"743e\">\u60a8\u53ef\u4ee5\u5c07\u9019\u8996\u70ba\u4e00\u6b21\u6027\u93c8\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\/miro.medium.com\/v2\/resize%3Afit%3A1250\/1%2AKslelscsYTuSLjzEt5dWPg.png?w=640&#038;ssl=1\" alt=\"\"\/><\/figure>\n<\/div>\n\n\n<p id=\"94f2\">\u8003\u616e\u4e0b\u9762\u7684\u7bc4\u4f8b\uff0c\u4ee3\u7406\u53ef\u80fd\u6703\u88ab\u554f\u5230\u975e\u5e38\u6a21\u7cca\u7684\u554f\u984c\uff0c\u4f8b\u5982\uff1a<code>Who is regarded as the father of the iPhone and what is the square root of his year of birth?\u201d<\/code><\/p>\n\n\n\n<p id=\"607e\">\u6216\u8005<\/p>\n\n\n\n<p id=\"f459\"><code>What is the square root of the year of birth, of the man who is generally regarded as the father of the iPhone?<\/code><\/p>\n\n\n\n<p id=\"04f3\">\u5982\u4e0b\u6240\u793a\uff0c\u667a\u80fd\u9ad4\u5373\u6642\u5275\u9020\u4e00\u689d\u93c8<strong>\uff0c<\/strong>\u53cd\u601d<strong>\u554f\u984c\uff0c\u4e26\u7d93\u6b77<\/strong><strong>\u884c\u52d5<\/strong>\u3001<strong>\u89c0\u5bdf<\/strong>\u3001<strong>\u601d\u8003<\/strong>\u3001<strong>\u884c\u52d5<\/strong>\u3001<strong>\u89c0\u5bdf\u3001<\/strong>&nbsp;<strong>\u601d\u8003<\/strong>\u7684\u904e\u7a0b\u2026\u76f4\u5230\u5f97\u51fa\u6700\u7d42\u7b54\u6848\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">> Entering new AgentExecutor chain...<br>I need to find out who is regarded as the father of the iPhone and his year of birth. Then, I will calculate the square root of his year of birth. <br>Action: Search<br>Action Input: father of the iPhone year of birth<br>Observation: Family. Steven Paul Jobs was born in San Francisco, California, on February 24, 1955, to Joanne Carole Schieble and Abdulfattah \"John\" Jandali (Arabic: \u0639\u0628\u062f \u0627\u0644\u0641 ...<br>Thought:I found that Steve Jobs is regarded as the father of the iPhone and he was born in 1955. Now I will calculate the square root of his year of birth.<br>Action: Calculator<br>Action Input: sqrt(1955)<br>Observation: Answer: 44.21538193886829<br>Thought:I now know the final answer.<br>Final Answer: Steve Jobs is regarded as the father of the iPhone, and the square root of his year of birth (1955) is approximately 44.22.<br><br>> Finished chain.<br>'Steve Jobs is regarded as the father of the iPhone, and the square root of his year of birth (1955) is approximately 44.22.<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"284e\">\u6311\u6230<\/h2>\n\n\n\n<p id=\"d062\">\u4ee3\u7406\u7684\u6311\u6230\uff0c\u4ee5\u53ca\u6211\u6700\u5e38\u807d\u5230\u7684\u6279\u8a55\u9ede\uff0c\u662f\u4ee3\u7406\u64c1\u6709\u904e\u9ad8\u7684\u81ea\u4e3b\u6027\u3002<\/p>\n\n\n\n<p>\u958b\u767c\u8005\u5e0c\u671b\u5c0d\u4ee3\u7406\u6709\u4e00\u5b9a\u7a0b\u5ea6\u7684\u63a7\u5236\u3002<\/p>\n\n\n\n<p id=\"0afb\">\u56e0\u6b64\uff0c\u4ee3\u7406\u7684\u5f15\u5165\u4f7f\u6211\u5011\u5f9e\u904e\u5ea6\u7684\u63a7\u5236\u548c\u50f5\u5316\u8f49\u5411\u4e86\u66f4\u5927\u7684\u9748\u6d3b\u6027\uff0c\u4f46\u4e5f\u5e36\u4f86\u4e86\u7f3a\u4e4f\u63a7\u5236\u7684\u554f\u984c\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"30bf\">\u5f9eLangChain\u9032\u5165LangGraph<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"db7c\">\u4f46\u9996\u5148\uff0c\u4ec0\u9ebc\u662f Graph \u4f5c\u70ba\u4e00\u7a2e\u8cc7\u6599\u578b\u614b\uff1f<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"3032\">\u4ec0\u9ebc\u662f\u5716\uff08\u62bd\u8c61\u8cc7\u6599\u578b\u5225\uff09<\/h2>\n\n\n\n<p id=\"7d89\">\u5716\u6578\u64da\u7684\u6982\u5ff5\u4e00\u958b\u59cb\u53ef\u80fd\u770b\u8d77\u4f86\u6709\u4e9b\u6666\u6f80\uff0c\u4f46\u6211\u6703\u5728\u6b64\u5617\u8a66\u5c07\u5176\u5206\u89e3\u8aaa\u660e\u3002<\/p>\n\n\n\n<p>\u78ba\u5be6\uff0c\u5716\u662f\u4e00\u7a2e\u62bd\u8c61\u6578\u64da\u985e\u578b\u2026<\/p>\n\n\n\n<p>\u62bd\u8c61\u6578\u64da\u985e\u578b\u662f\u4e00\u7a2e\u6578\u64da\u985e\u578b\u7684\u6578\u5b78\u6a21\u578b\uff0c\u5f9e\u4f7f\u7528\u8005\u7684\u89d2\u5ea6\u4f86\u770b\uff0c\u5b83\u662f\u7531\u5176\u884c\u70ba\uff08\u8a9e\u7fa9\uff09\u5b9a\u7fa9\u7684\u3002<\/p>\n\n\n\n<p>\u62bd\u8c61\u6578\u64da\u985e\u578b\u8207\u6578\u64da\u7d50\u69cb\u5f62\u6210\u4e86\u9bae\u660e\u5c0d\u6bd4\uff0c\u6578\u64da\u7d50\u69cb\u662f\u6578\u64da\u7684\u5177\u9ad4\u8868\u793a\uff0c\u662f\u5be6\u73fe\u8005\u7684\u89c0\u9ede\uff0c\u800c\u975e\u4f7f\u7528\u8005\u7684\u89c0\u9ede\u3002\u9019\u7a2e\u6578\u64da\u7d50\u69cb\u8f03\u4e0d\u6666\u6f80\u4e14\u5bb9\u6613\u7406\u89e3\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"d9bf\">\u6709\u5411\u5716<\/h2>\n\n\n\n<p id=\"0e73\"><strong>\u6709\u5411\u5716<\/strong>\uff08\u6216\u7a31\u70ba<strong>\u6709\u5411\u5716<\/strong>\uff09\u662f\u4e00\u7a2e\u7531\u4e00\u7d44\u7bc0\u9ede\u548c\u7531\u5b9a\u5411\u908a\u9023\u63a5\u7684\u9019\u4e9b\u7bc0\u9ede\u7d44\u6210\u7684\u5716\u3002<\/p>\n\n\n\n<p>\u5728\u5716\u6578\u64da\u7d50\u69cb\u4e2d\uff0c\u6709\u9650\u7684\u7bc0\u9ede\u96c6\u8207\u9019\u4e9b\u7bc0\u9ede\u7684\u7121\u5e8f\u5c0d\u69cb\u6210\u4e86\u7121\u5411\u5716\u3002<\/p>\n\n\n\n<p>\u5728\u4e0b\u65b9\u7684\u5716\u8868\u793a\u4e2d\uff0c\u986f\u793a\u4e86\u7bc0\u9ede\u3001\u908a\u53ca\u5176\u908a\u7684\u9078\u9805\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\/miro.medium.com\/v2\/resize%3Afit%3A1250\/1%2AaqMsCkEmDMjAo9V3syF5oQ.png?w=640&#038;ssl=1\" alt=\"\"\/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"6f16\">LangGraph<\/h2>\n\n\n\n<p id=\"20c4\">\u518d\u6b21\u8003\u616e\u4e0b\u65b9\u7684\u5716\u7247\uff0c\u5de6\u5074\u986f\u793a\u4e86\u4e00\u6bb5 LangGraph \u7684 Python \u4ee3\u78bc\u7247\u6bb5\uff0c\u53f3\u5074\u5247\u662f\u76f8\u5c0d\u61c9\u7684\u5716\u5f62\u3002\u60a8\u53ef\u4ee5\u5728\u4ee3\u78bc\u4e2d\u770b\u5230\u7bc0\u9ede\u7684\u5b9a\u7fa9\u90e8\u5206\uff0c\u5373 <code>builder.add_node<\/code>\uff0c\u4e26\u4f7f\u7528 <code>ReturnNodeValue<\/code>\u3002\u5c0d\u65bc\u6bcf\u500b\u7bc0\u9ede\uff0c\u908a\u7684\u5b9a\u7fa9\u5247\u4f7f\u7528 <code>builder.add_edge<\/code>\u3002<\/p>\n\n\n\n<p id=\"6f8a\">\u540c\u6642\uff0c\u60a8\u53ef\u4ee5\u770b\u5230\u7bc0\u9ede <code>a<\/code> \u88ab\u8a2d\u7f6e\u70ba <code>entry_point<\/code>\uff08\u5165\u53e3\u9ede\uff09\uff0c\u800c\u7bc0\u9ede <code>d<\/code> \u5247\u88ab\u8a2d\u7f6e\u70ba <code>finish_point<\/code>\uff08\u7d50\u675f\u9ede\uff09\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\/miro.medium.com\/v2\/resize%3Afit%3A1250\/1%2AkSGVarD88QMFf1lFPMfcJQ.png?w=640&#038;ssl=1\" alt=\"\"\/><\/figure>\n<\/div>\n\n\n<p id=\"cc46\">LangGraph \u662f\u5efa\u7acb\u5728 LangChain \u4e4b\u4e0a\u7684\u6a21\u7d44\uff0c\u65e8\u5728\u66f4\u597d\u5730\u652f\u6301\u5faa\u74b0\u5716\u7684\u5275\u5efa\uff0c\u9019\u5728\u4ee3\u7406\u57f7\u884c\u6642\u5e38\u5e38\u662f\u5fc5\u9700\u7684\u3002<\/p>\n\n\n\n<p>LangChain \u7684\u4e00\u500b\u4e3b\u8981\u512a\u52e2\u662f\u5176\u80fd\u5920\u8f15\u9b06\u5275\u5efa\u81ea\u5b9a\u7fa9\u93c8\uff0c\u9019\u4e5f\u7a31\u70ba\u6d41\u7a0b\u5de5\u7a0b\u3002\u5c07 LangGraph \u8207 LangChain \u7684\u4ee3\u7406\u7d50\u5408\uff0c\u4ee3\u7406\u53ef\u4ee5\u662f\u65e2\u6709\u65b9\u5411\u6027\u4e5f\u53ef\u5305\u542b\u5faa\u74b0\u7684\u5716\u5f62\u3002<\/p>\n\n\n\n<p>**\u6709\u5411\u7121\u74b0\u5716\uff08DAG\uff09**\u662f\u4e00\u7a2e\u985e\u578b\u7684\u5716\uff0c\u5728\u8a08\u7b97\u6a5f\u79d1\u5b78\u548c\u6578\u5b78\u4e2d\u88ab\u5ee3\u6cdb\u61c9\u7528\u3002\u4ee5\u4e0b\u662f\u5176\u7c21\u55ae\u89e3\u91cb\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6709\u5411<\/strong>\uff1a\u6bcf\u500b\u7bc0\u9ede\uff08\u6216\u9802\u9ede\uff09\u4e4b\u9593\u7684\u9023\u63a5\uff08\u6216\u908a\uff09\u5177\u6709\u65b9\u5411\u6027\uff0c\u985e\u4f3c\u65bc\u55ae\u884c\u9053\uff0c\u8868\u793a\u5f9e\u4e00\u500b\u7bc0\u9ede\u5230\u53e6\u4e00\u500b\u7bc0\u9ede\u7684\u65b9\u5411\u3002<\/li>\n\n\n\n<li><strong>\u7121\u74b0<\/strong>\uff1a\u5716\u4e2d\u6c92\u6709\u4efb\u4f55\u74b0\u8def\u3002\u9019\u610f\u5473\u8457\u5982\u679c\u5f9e\u67d0\u500b\u7bc0\u9ede\u51fa\u767c\u4e26\u6309\u7167\u65b9\u5411\u884c\u9032\uff0c\u5c07\u7121\u6cd5\u56de\u5230\u540c\u4e00\u7bc0\u9ede\u3002\u6c92\u6709\u9032\u5165\u5faa\u74b0\u7684\u53ef\u80fd\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u53ef\u4ee5\u5c07\u5176\u60f3\u50cf\u70ba\u5bb6\u8b5c\u6216\u6d41\u7a0b\u5716\uff0c\u5176\u4e2d\u53ea\u80fd\u5411\u524d\u79fb\u52d5\uff0c\u7121\u6cd5\u56de\u5230\u8d77\u59cb\u9ede\u3002<\/p>\n\n\n\n<p>\u5728\u958b\u767c\u66f4\u8907\u96dc\u7684 LLM \u61c9\u7528\u7a0b\u5f0f\u6642\uff0c\u4e00\u500b\u5e38\u898b\u7684\u6a21\u5f0f\u662f\u5c07\u5faa\u74b0\u5f15\u5165\u904b\u884c\u6642\u4e2d\uff0c\u9019\u4e9b\u5faa\u74b0\u901a\u5e38\u4f7f\u7528 LLM \u4f86\u6c7a\u5b9a\u6d41\u7a0b\u4e2d\u7684\u4e0b\u4e00\u6b65\u3002<\/p>\n\n\n\n<p id=\"fdd4\">LLM \u7684\u4e00\u5927\u512a\u52e2\u662f\u5176\u57f7\u884c\u63a8\u7406\u4efb\u52d9\u7684\u80fd\u529b\uff0c\u57fa\u672c\u4e0a\u53ef\u4ee5\u50cf\u5728 for \u8ff4\u5708\u4e2d\u4e00\u6a23\u5de5\u4f5c\u3002\u63a1\u7528\u6b64\u65b9\u6cd5\u7684\u7cfb\u7d71\u901a\u5e38\u88ab\u7a31\u70ba\u4ee3\u7406\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"5be4\">Agents &amp; Control<\/h1>\n\n\n\n<p id=\"d9c9\">\u7136\u800c\uff0c\u5faa\u74b0\u4ee3\u7406\u901a\u5e38\u9700\u8981\u5728\u5404\u500b\u968e\u6bb5\u9032\u884c\u7d30\u7dfb\u7684\u63a7\u5236\u3002<\/p>\n\n\n\n<p>\u958b\u767c\u8005\u53ef\u80fd\u9700\u8981\u78ba\u4fdd\u4ee3\u7406\u9996\u5148\u8abf\u7528\u7279\u5b9a\u5de5\u5177\uff0c\u6216\u8005\u5e0c\u671b\u5c0d\u5de5\u5177\u7684\u4f7f\u7528\u65b9\u5f0f\u6709\u66f4\u591a\u63a7\u5236\u3002<\/p>\n\n\n\n<p>\u6b64\u5916\uff0c\u4ed6\u5011\u53ef\u80fd\u5e0c\u671b\u6839\u64da\u4ee3\u7406\u7576\u524d\u7684\u72c0\u614b\u4f7f\u7528\u4e0d\u540c\u7684\u63d0\u793a\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"e556\"><strong>\u516c\u958b\u7a84\u63a5\u53e3<\/strong><\/h1>\n\n\n\n<p id=\"31cd\">LangGraph \u7684\u6838\u5fc3\u63d0\u4f9b\u4e86\u4e00\u500b\u5efa\u69cb\u5728 LangChain \u4e4b\u4e0a\u7684\u7c21\u5316\u4ecb\u9762\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"6323\">\u70ba\u4ec0\u9ebc\u9078\u64c7 LangGraph\uff1f<\/h1>\n\n\n\n<p id=\"2ed7\">LangGraph \u8207\u6846\u67b6\u7121\u95dc\uff0c\u6bcf\u500b\u7bc0\u9ede\u90fd\u5145\u7576\u5e38\u898f Python \u51fd\u6578\u3002<\/p>\n\n\n\n<p id=\"59dc\">\u5b83\u64f4\u5c55\u4e86\u6838\u5fc3 Runnable API\uff08\u7528\u65bc\u4e32\u6d41\u3001\u975e\u540c\u6b65\u548c\u6279\u6b21\u547c\u53eb\u7684\u5171\u4eab\u4ecb\u9762\uff09\u4ee5\u4fc3\u9032\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8de8\u591a\u500b\u5c0d\u8a71\u56de\u5408\u6216\u5de5\u5177\u6240\u4f7f\u7528\u7684\u7121\u7e2b\u72c0\u614b\u7ba1\u7406\u3002<\/li>\n\n\n\n<li>\u57fa\u65bc\u52d5\u614b\u6a19\u6e96\u7684\u7bc0\u9ede\u9593\u9748\u6d3b\u8def\u7531<\/li>\n\n\n\n<li>\u6cd5\u5b78\u78a9\u58eb\u548c\u4eba\u5de5\u5e79\u9810\u4e4b\u9593\u7684\u5e73\u7a69\u904e\u6e21<\/li>\n\n\n\n<li>\u9577\u671f\u904b\u884c\u7684\u591a\u6703\u8a71\u61c9\u7528\u7a0b\u5f0f\u7684\u6301\u4e45\u6027<\/li>\n<\/ol>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"3c2c\">LangGraph \u804a\u5929\u6a5f\u5668\u4eba<\/h1>\n\n\n\n<p id=\"65d9\">\u4e0b\u9762\u662f\u4e00\u500b\u57fa\u65bc Anthropic \u6a21\u578b\u7684\u6b63\u5728\u904b\u884c\u7684 LangChain \u804a\u5929\u6a5f\u5668\u4eba\u3002\u57fa\u672c\u7a0b\u5f0f\u78bc\u662f\u5f9e LangChain \u7684\u98df\u8b5c\u4e2d\u7684\u7bc4\u4f8b\u7a0b\u5f0f\u78bc\u8907\u88fd\u800c\u4f86\u7684\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">%%capture --no-stderr<br>%pip install -U langgraph langsmith<br><br># Used for this tutorial; not a requirement for LangGraph<br>%pip install -U langchain_anthropic<br><br><br>#################################<br>import getpass<br>import os<br><br><br>def _set_env(var: str):<br>    if not os.environ.get(var):<br>        os.environ[var] = getpass.getpass(f\"{var}: \")<br><br><br>_set_env(\"ANTHROPIC_API_KEY\")<br>#################################<br>from typing import Annotated<br><br>from typing_extensions import TypedDict<br><br>from langgraph.graph import StateGraph<br>from langgraph.graph.message import add_messages<br><br><br>class State(TypedDict):<br>    # Messages have the type \"list\". The `add_messages` function<br>    # in the annotation defines how this state key should be updated<br>    # (in this case, it appends messages to the list, rather than overwriting them)<br>    messages: Annotated[list, add_messages]<br><br><br>graph_builder = StateGraph(State)<br>#################################<br>from langchain_anthropic import ChatAnthropic<br><br>llm = ChatAnthropic(model=\"claude-3-haiku-20240307\")<br><br><br>def chatbot(state: State):<br>    return {\"messages\": [llm.invoke(state[\"messages\"])]}<br><br><br># The first argument is the unique node name<br># The second argument is the function or object that will be called whenever<br># the node is used.<br>graph_builder.add_node(\"chatbot\", chatbot)<br>#################################<br>graph_builder.set_entry_point(\"chatbot\")<br><br>#################################<br>graph_builder.set_finish_point(\"chatbot\")<br>#################################<br>graph = graph_builder.compile()<br>#################################<br>from IPython.display import Image, display<br><br>try:<br>    display(Image(graph.get_graph().draw_mermaid_png()))<br>except Exception:<br>    # This requires some extra dependencies and is optional<br>    pass<br>#################################<br>while True:<br>    user_input = input(\"User: \")<br>    if user_input.lower() in [\"quit\", \"exit\", \"q\"]:<br>        print(\"Goodbye!\")<br>        break<br>    for event in graph.stream({\"messages\": (\"user\", user_input)}):<br>        for value in event.values():<br>            print(\"Assistant:\", value[\"messages\"][-1].content)<br>#################################<\/pre>\n\n\n\n<p id=\"e9d0\">\u4e0b\u9762\u7684\u622a\u5716\u986f\u793a\u4e86\u5716\u5f62\u5982\u4f55\u6e32\u67d3\u6d41\u7a0b\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\/miro.medium.com\/v2\/resize%3Afit%3A1250\/1%2AtcZPy11woYwc2BZ9J5JCyw.png?w=640&#038;ssl=1\" alt=\"\"\/><\/figure>\n<\/div>\n\n\n<h1 class=\"wp-block-heading\" id=\"d687\">\u6700\u5f8c<\/h1>\n\n\n\n<p id=\"f943\"><strong>\u5716\u6578\u64da\u985e\u578b<\/strong>\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u7528\u65bc\u5448\u73fe\u6578\u64da\u7684\u8996\u89ba\u5316\u8868\u793a\u3002\u4e0d\u50c5\u662f\u8996\u89ba\u5316\u8868\u793a\uff0c\u4e0d\u540c\u7bc0\u9ede\u4e4b\u9593\u7684\u95dc\u4fc2\u4e5f\u975e\u5e38\u9069\u5408\u5275\u5efa\u6578\u64da\u7bc0\u9ede\u7684\u7a7a\u9593\u8868\u793a\u3002<\/p>\n\n\n\n<p id=\"5a90\">\u5f9e\u6578\u64da\u4f7f\u7528\u8005\u7684\u89d2\u5ea6\u4f86\u770b\uff0c\u5716\u6578\u64da\u985e\u578b\u5728\u8a9e\u7fa9\u884c\u70ba\u4e0a\u4e5f\u975e\u5e38\u7406\u60f3\uff0c\u80fd\u5920\u76f4\u89c0\u5730\u5c55\u73fe\u6578\u64da\u4e4b\u9593\u7684\u95dc\u806f\u548c\u7d50\u69cb\u3002<\/p>\n\n\n\n<p>\u8cc7\u6599\u4f86\u6e90: <a href=\"https:\/\/cobusgreyling.medium.com\/langgraph-from-langchain-explained-in-simple-terms-f7cd0c12cdbf\">https:\/\/cobusgreyling.medium.com\/langgraph-from-langchain-explained-in-simple-terms-f7cd0c12cdbf<\/a><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>2024-06-17 | Cobus Greyling \u4ecb\u7d39 \u70ba\u4ec0\u9ebc\u6211\u5011\u8981\u56de\u5230\u72c0\u614b\u548c\u72c0\u614b\u8f49\u63db\u63a7\u5236\uff1f\u6211\u4ee5\u70ba\u96a8\u8457\u81ea\u4e3bAI\u4ee3\u7406\u7684\u51fa\u73fe\uff0c\u6211\u5011\u5df2\u7d93\u8d85\u8d8a\u4e86\u72c0\u614b\u63a7\u5236\u548c\u8f49\u63db\u7684\u6982\u5ff5\uff1f \u5176\u5be6\uff0c\u5982\u679c\u4f60\u89c0&hellip;<\/p>\n","protected":false},"author":4,"featured_media":7371,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[579,4],"tags":[40],"class_list":["post-7370","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-579","category-industry-news","tag-40"],"gutentor_comment":0,"jetpack_featured_media_url":"https:\/\/i0.wp.com\/aict.nkust.edu.tw\/digitrans\/wp-content\/uploads\/2024\/10\/%E8%9E%A2%E5%B9%95%E6%93%B7%E5%8F%96%E7%95%AB%E9%9D%A2-2024-10-31-152501.png?fit=1463%2C815&ssl=1","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/aict.nkust.edu.tw\/digitrans\/index.php?rest_route=\/wp\/v2\/posts\/7370","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aict.nkust.edu.tw\/digitrans\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aict.nkust.edu.tw\/digitrans\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aict.nkust.edu.tw\/digitrans\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/aict.nkust.edu.tw\/digitrans\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7370"}],"version-history":[{"count":5,"href":"https:\/\/aict.nkust.edu.tw\/digitrans\/index.php?rest_route=\/wp\/v2\/posts\/7370\/revisions"}],"predecessor-version":[{"id":7388,"href":"https:\/\/aict.nkust.edu.tw\/digitrans\/index.php?rest_route=\/wp\/v2\/posts\/7370\/revisions\/7388"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aict.nkust.edu.tw\/digitrans\/index.php?rest_route=\/wp\/v2\/media\/7371"}],"wp:attachment":[{"href":"https:\/\/aict.nkust.edu.tw\/digitrans\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7370"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aict.nkust.edu.tw\/digitrans\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7370"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aict.nkust.edu.tw\/digitrans\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}