{"id":19223,"date":"2024-03-07T10:03:15","date_gmt":"2024-03-07T02:03:15","guid":{"rendered":"https:\/\/aif.amtbbs.org\/?p=19223"},"modified":"2024-03-07T10:03:15","modified_gmt":"2024-03-07T02:03:15","slug":"%e4%b8%80%e6%96%87%e8%a7%a3%e6%9e%90%e5%a6%82%e4%bd%95%e5%9f%ba%e4%ba%8e-langchain-%e6%9e%84%e5%bb%ba-llm-%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f","status":"publish","type":"post","link":"https:\/\/aif.amtbbs.org\/index.php\/2024\/03\/07\/19223\/","title":{"rendered":"\u4e00\u6587\u89e3\u6790\u5982\u4f55\u57fa\u4e8e LangChain \u6784\u5efa LLM \u5e94\u7528\u7a0b\u5e8f"},"content":{"rendered":"<div class=\"article-desc\">LangChain \u4f5c\u4e3a\u4e00\u4e2a\u56f4\u7ed5 LLM 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src=\"https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/d8df5997982fb2112ce7125a3f41f8540c1508.jpg\" width=\"800\" height=\"534\" srcset=\"https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/d8df5997982fb2112ce7125a3f41f8540c1508.jpg 800w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/d8df5997982fb2112ce7125a3f41f8540c1508-300x200.jpg 300w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/d8df5997982fb2112ce7125a3f41f8540c1508-150x100.jpg 150w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/d8df5997982fb2112ce7125a3f41f8540c1508-768x513.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>\u4ece\u67d0\u79cd\u610f\u4e49\u4e0a\u6765\u8bb2\uff0cLLM 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\u548c\u5176\u4ed6\u4e0a\u4e0b\u6587\u611f\u77e5\u5de5\u4f5c\u6d41\u7a0b\uff0c\u53ef\u4ee5\u51cf\u5c11\u6a21\u578b\u4ea7\u751f\u7684\u5e7b\u89c9\uff0c\u63d0\u9ad8\u54cd\u5e94\u7684\u51c6\u786e\u6027\u3002<\/p>\n<h4>2.\u7b80\u5316\u4eba\u5de5\u667a\u80fd\u5f00\u53d1<\/h4>\n<p>LangChain \u901a\u8fc7\u7b80\u5316\u6570\u636e\u6e90\u96c6\u6210\u7684\u590d\u6742\u6027\u5e76\u5feb\u901f\u63d0\u70bc\uff0c\u7b80\u5316\u4e86 AI \u5f00\u53d1\u8fc7\u7a0b\u3002\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u81ea\u5b9a\u4e49\u5e8f\u5217\uff0c\u5feb\u901f\u6784\u5efa\u590d\u6742\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u8f6f\u4ef6\u56e2\u961f\u53ef\u4ee5\u4fee\u6539 LangChain \u63d0\u4f9b\u7684\u6a21\u677f\u548c\u5e93\uff0c\u4ee5\u51cf\u5c11\u5f00\u53d1\u65f6\u95f4\uff0c\u800c\u4e0d\u5fc5\u4ece\u5934\u7f16\u5199\u4e1a\u52a1\u903b\u8f91\u3002<\/p>\n<h4>3.\u5f00\u53d1\u8005\u652f\u6301<\/h4>\n<p>LangChain \u4e3a AI \u5f00\u53d1\u8005\u63d0\u4f9b\u4e86\u8fde\u63a5\u8bed\u8a00\u6a21\u578b\u548c\u5916\u90e8\u6570\u636e\u6e90\u7684\u5de5\u5177\u3002\u6bd5\u7adf\uff0c\u5b83\u662f\u5f00\u6e90\u7684\uff0c\u5e76\u5f97\u5230\u6d3b\u8dc3\u793e\u533a\u7684\u652f\u6301\u3002\u7ec4\u7ec7\u53ef\u4ee5\u514d\u8d39\u4f7f\u7528 LangChain\uff0c\u5e76\u83b7\u5f97\u5176\u4ed6\u719f\u6089\u8be5\u6846\u67b6\u7684\u5f00\u53d1\u4eba\u5458\u7684\u652f\u6301\u3002<\/p>\n<h3>\u4e09\u3001LangChain \u7684\u6838\u5fc3\u7ec4\u4ef6\u89e3\u6790<\/h3>\n<p>LangChain \u7684\u72ec\u7279\u4e4b\u5904\u4e4b\u4e00\u4fbf\u662f\u5176\u7075\u6d3b\u6027\u548c\u6a21\u5757\u5316\u3002\u901a\u8fc7\u5c06\u81ea\u7136\u8bed\u8a00\u5904\u7406\u7ba1\u9053\u5206\u89e3\u4e3a\u5355\u72ec\u7684\u7ec4\u4ef6\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u8f7b\u677e\u6df7\u5408\u548c\u5339\u914d\u8fd9\u4e9b\u6784\u5efa\u5757\uff0c\u4ee5\u521b\u5efa\u6ee1\u8db3\u5176\u7279\u5b9a\u9700\u6c42\u7684\u81ea\u5b9a\u4e49\u5de5\u4f5c\u6d41\u7a0b\uff0c\u4ece\u800c\u4f7f\u5f97 LangChain \u6210\u4e3a\u4e00\u4e2a\u9ad8\u5ea6\u9002\u5e94\u6027\u7684\u6846\u67b6\uff0c\u53ef\u7528\u4e8e\u4e3a\u5e7f\u6cdb\u7684\u7528\u4f8b\u548c\u884c\u4e1a\u6784\u5efa\u5bf9\u8bdd\u5f0f\u4eba\u5de5\u667a\u80fd\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<p>LangChain \u662f\u63d0\u4f9b\u4e86\u4e00\u7ec4\u6a21\u5757\uff0c\u80fd\u591f\u6784\u5efa\u5b8c\u6574\u7684 LLM(Language Model)\u5e94\u7528\u7a0b\u5e8f\u7ba1\u9053\uff0c\u5e76\u4e0e\u5404\u79cd\u6570\u636e\u52a0\u8f7d\u5668\u3001\u5411\u91cf\u5b58\u50a8\u548c LLM \u63d0\u4f9b\u7a0b\u5e8f\u7b49\u8fdb\u884c\u5e7f\u6cdb\u7684\u96c6\u6210\u3002LangChain\u7684\u4e3b\u8981\u6838\u5fc3\u7ec4\u4ef6\u53ef\u53c2\u8003\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p><img data-dominant-color=\"fcfcfc\" data-has-transparency=\"false\" style=\"--dominant-color: #fcfcfc;\" loading=\"lazy\" decoding=\"async\" class=\"not-transparent alignnone size-full wp-image-19227\" src=\"https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/17e278f270e04bf8f1e24752fd05fa9aeb1935.png\" width=\"1080\" height=\"864\" alt=\"\" title=\"\u56fe\u7247\" srcset=\"https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/17e278f270e04bf8f1e24752fd05fa9aeb1935.png 1080w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/17e278f270e04bf8f1e24752fd05fa9aeb1935-300x240.png 300w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/17e278f270e04bf8f1e24752fd05fa9aeb1935-1024x819.png 1024w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/17e278f270e04bf8f1e24752fd05fa9aeb1935-150x120.png 150w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/17e278f270e04bf8f1e24752fd05fa9aeb1935-768x614.png 768w\" sizes=\"auto, (max-width: 1080px) 100vw, 1080px\" \/><\/p>\n<p>LangChain \u5173\u952e\u7ec4\u4ef6<\/p>\n<h4>1.Model I\/O<\/h4>\n<p>LangChain \u7684\u6838\u5fc3\u662f\u5f3a\u5927\u7684\u8bed\u8a00\u6a21\u578b(LLM)\uff0c\u4f7f\u5e94\u7528\u7a0b\u5e8f\u80fd\u591f\u7406\u89e3\u548c\u751f\u6210\u7c7b\u4f3c\u4eba\u7c7b\u7684\u6587\u672c\u3002\u901a\u8fc7 LangChain\uff0c\u5f00\u53d1\u4eba\u5458\u80fd\u591f\u51fa\u8272\u5730\u5b8c\u6210\u5404\u79cd\u4e0e\u8bed\u8a00\u76f8\u5173\u7684\u4efb\u52a1\u3002\u65e0\u8bba\u662f\u7406\u89e3\u7528\u6237\u67e5\u8be2\u3001\u751f\u6210\u54cd\u5e94\uff0c\u8fd8\u662f\u6267\u884c\u590d\u6742\u7684\u8bed\u8a00\u4efb\u52a1\uff0cLangChain \u7684\u6a21\u578b\u90fd\u662f\u8bed\u8a00\u5904\u7406\u80fd\u529b\u7684\u652f\u67f1\u3002<\/p>\n<p>Models \u6a21\u5757\u8d1f\u8d23\u7ba1\u7406\u4e0e\u8bed\u8a00\u6a21\u578b\u7684\u4ea4\u4e92\u3002LangChain \u652f\u6301\u4e00\u7cfb\u5217 LLM\uff0c\u5305\u62ec GPT-3\u3001OpenAI \u7b49\u3002\u5f00\u53d1\u8005\u53ef\u4ee5\u4f7f\u7528 Models \u6a21\u5757\u6765\u7ba1\u7406 LLM \u7684\u914d\u7f6e\uff0c\u4f8b\u5982\u8bbe\u7f6e\u6e29\u5ea6\u3001top-p \u7b49\u53c2\u6570\u3002\u6a21\u578b\u6a21\u5757\u5bf9\u4e8e\u63d0\u9ad8 LLM \u7684\u80fd\u529b\u5e76\u4f7f\u5f00\u53d1\u4eba\u5458\u80fd\u591f\u6784\u5efa\u53ef\u751f\u6210\u521b\u610f\u548c\u4e0a\u4e0b\u6587\u76f8\u5173\u5185\u5bb9\u7684\u5e94\u7528\u7a0b\u5e8f\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_0\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-javascript\" tabindex=\"0\"><code class=\"language-javascript\">from langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI\r\nllm <span class=\"token operator\">=<\/span> <span class=\"token function\">OpenAI<\/span><span class=\"token punctuation\">(<\/span>model_name<span class=\"token operator\">=<\/span><span class=\"token string\">\"text-davinci-003\"<\/span><span class=\"token punctuation\">)<\/span>\r\n\r\n# The <span class=\"token constant\">LLM<\/span> takes a prompt <span class=\"token keyword\">as<\/span> an input and outputs a completion\r\nprompt <span class=\"token operator\">=<\/span> <span class=\"token string\">\"When can I achieve financial freedom?\"<\/span>\r\ncompletion <span class=\"token operator\">=<\/span> <span class=\"token function\">llm<\/span><span class=\"token punctuation\">(<\/span>prompt<span class=\"token punctuation\">)<\/span><\/code><\/pre>\n<ul id=\"code_id_0\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h4>2.Chains<\/h4>\n<p>Chains \u6a21\u5757\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u8d1f\u8d23\u94fe\u63a5\u4e0d\u540c\u7684\u7ec4\u4ef6\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u5229\u7528 Chains \u6a21\u5757\u521b\u5efa\u94fe\u5f0f\u7ed3\u6784\uff0c\u5c06\u63d0\u793a\u3001\u6a21\u578b\u548c\u5176\u4ed6\u5e94\u7528\u7a0b\u5e8f\u7ec4\u4ef6\u6709\u673a\u5730\u8fde\u63a5\u5728\u4e00\u8d77\u3002\u8fd9\u79cd\u94fe\u5f0f\u7ed3\u6784\u5bf9\u4e8e\u6784\u5efa\u9700\u8981\u591a\u4e2a\u7ec4\u4ef6\u534f\u540c\u5de5\u4f5c\u7684\u590d\u6742\u5e94\u7528\u7a0b\u5e8f\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<p>\u901a\u8fc7 Chains \u6a21\u5757\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u7075\u6d3b\u7ec4\u5408\u548c\u914d\u7f6e\u4e0d\u540c\u7684\u7ec4\u4ef6\uff0c\u5f62\u6210\u4e00\u4e2a\u5b8c\u6574\u7684\u5e94\u7528\u7a0b\u5e8f\u7ba1\u9053\uff0c\u5b9e\u73b0\u9ad8\u5ea6\u5b9a\u5236\u5316\u7684\u529f\u80fd\u548c\u903b\u8f91\u3002<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_1\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-javascript\" tabindex=\"0\"><code class=\"language-javascript\">chain <span class=\"token operator\">=<\/span> <span class=\"token function\">LLMChain<\/span><span class=\"token punctuation\">(<\/span>llm <span class=\"token operator\">=<\/span> llm<span class=\"token punctuation\">,<\/span> \r\n                  prompt <span class=\"token operator\">=<\/span> prompt<span class=\"token punctuation\">)<\/span>\r\n\r\nchain<span class=\"token punctuation\">.<\/span><span class=\"token function\">run<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"ai\"<\/span><span class=\"token punctuation\">)<\/span><\/code><\/pre>\n<ul id=\"code_id_1\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h4>3.Agents<\/h4>\n<p>Agents \u6a21\u5757\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u627f\u62c5\u4e86\u7ba1\u7406\u5e94\u7528\u7a0b\u5e8f\u4e0e\u5916\u754c\u4e4b\u95f4\u4ea4\u4e92\u7684\u91cd\u8981\u89d2\u8272\u3002\u901a\u8fc7\u4f7f\u7528 Agents \u6a21\u5757\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u6784\u5efa\u5404\u79cd\u7c7b\u578b\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u5982\u4e2a\u4eba\u52a9\u7406\u3001\u667a\u80fd\u804a\u5929\u673a\u5668\u4eba\u7b49\u3002\u8fd9\u4e9b\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u57fa\u4e8e\u8bed\u97f3\u6216\u6587\u672c\u8f93\u5165\u8fdb\u884c\u4ea4\u4e92\uff0c\u5e76\u901a\u8fc7\u5206\u6790\u548c\u7406\u89e3\u8f93\u5165\u6570\u636e\u6765\u63d0\u4f9b\u76f8\u5e94\u7684\u54cd\u5e94\u548c\u670d\u52a1\u3002<\/p>\n<p>Agents \u6a21\u5757\u4e3a\u5f00\u53d1\u4eba\u5458\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7075\u6d3b\u3001\u53ef\u6269\u5c55\u7684\u5de5\u5177\uff0c\u4f7f\u4ed6\u4eec\u80fd\u591f\u8f7b\u677e\u6784\u5efa\u5177\u6709\u4ea4\u4e92\u529f\u80fd\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u4e3a\u7528\u6237\u63d0\u4f9b\u4e2a\u6027\u5316\u3001\u667a\u80fd\u5316\u7684\u4f53\u9a8c\u3002<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_2\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-javascript\" tabindex=\"0\"><code class=\"language-javascript\"><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Agent<\/span><span class=\"token operator\">:<\/span>\r\n\r\n    def <span class=\"token function\">__init__<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> config<span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span>\r\n        self<span class=\"token punctuation\">.<\/span>config <span class=\"token operator\">=<\/span> config\r\n        self<span class=\"token punctuation\">.<\/span>chain <span class=\"token operator\">=<\/span> <span class=\"token function\">Chain<\/span><span class=\"token punctuation\">(<\/span>config<span class=\"token punctuation\">)<\/span>\r\n        self<span class=\"token punctuation\">.<\/span>proxy <span class=\"token operator\">=<\/span> <span class=\"token function\">Proxy<\/span><span class=\"token punctuation\">(<\/span>config<span class=\"token punctuation\">)<\/span>\r\n        self<span class=\"token punctuation\">.<\/span>memory <span class=\"token operator\">=<\/span> <span class=\"token function\">Memory<\/span><span class=\"token punctuation\">(<\/span>config<span class=\"token punctuation\">)<\/span>\r\n        self<span class=\"token punctuation\">.<\/span>callback <span class=\"token operator\">=<\/span> <span class=\"token function\">Callback<\/span><span class=\"token punctuation\">(<\/span>config<span class=\"token punctuation\">)<\/span>\r\n\r\n    def <span class=\"token function\">parse_input<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> input<span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span>\r\n        # \u89e3\u6790\u7528\u6237\u7684\u8f93\u5165\u548c\u4e0a\u4e0b\u6587\u4fe1\u606f\r\n        <span class=\"token operator\">...<\/span><\/code><\/pre>\n<ul id=\"code_id_2\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<li>9.<\/li>\n<li>10.<\/li>\n<li>11.<\/li>\n<li>12.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h4>4.Memory<\/h4>\n<p>LangChain \u7684 Memory \u6a21\u5757\u627f\u62c5\u4e86\u6570\u636e\u5b58\u50a8\u7684\u7ba1\u7406\u4efb\u52a1\u3002\u901a\u8fc7\u4f7f\u7528 Memory \u6a21\u5757\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u8f7b\u677e\u5730\u5b58\u50a8\u548c\u68c0\u7d22\u5404\u79cd\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5982\u6587\u672c\u3001\u56fe\u50cf\u3001\u97f3\u9891\u7b49\u3002<\/p>\n<p>Memory \u6a21\u5757\u63d0\u4f9b\u4e86\u9ad8\u5ea6\u53ef\u6269\u5c55\u7684\u5b58\u50a8\u673a\u5236\uff0c\u53ef\u4ee5\u9002\u5e94\u4e0d\u540c\u89c4\u6a21\u548c\u7c7b\u578b\u7684\u6570\u636e\u5b58\u50a8\u9700\u6c42\u3002\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u6839\u636e\u5e94\u7528\u7a0b\u5e8f\u7684\u9700\u8981\uff0c\u7075\u6d3b\u5730\u7ec4\u7ec7\u548c\u7ba1\u7406\u5b58\u50a8\u7684\u6570\u636e\uff0c\u4ee5\u6ee1\u8db3\u5e94\u7528\u7a0b\u5e8f\u7684\u8981\u6c42\u3002<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_3\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-javascript\" tabindex=\"0\"><code class=\"language-javascript\">conversation <span class=\"token operator\">=<\/span> <span class=\"token function\">ConversationChain<\/span><span class=\"token punctuation\">(<\/span>llm<span class=\"token operator\">=<\/span>llm<span class=\"token punctuation\">,<\/span> verbose<span class=\"token operator\">=<\/span>True<span class=\"token punctuation\">)<\/span>\r\nconversation<span class=\"token punctuation\">.<\/span><span class=\"token function\">predict<\/span><span class=\"token punctuation\">(<\/span>input<span class=\"token operator\">=<\/span><span class=\"token string\">\"I am the last one.\"<\/span><span class=\"token punctuation\">)<\/span>\r\nconversation<span class=\"token punctuation\">.<\/span><span class=\"token function\">predict<\/span><span class=\"token punctuation\">(<\/span>input<span class=\"token operator\">=<\/span><span class=\"token string\">\"he is first.\"<\/span><span class=\"token punctuation\">)<\/span>\r\nconversation<span class=\"token punctuation\">.<\/span><span class=\"token function\">predict<\/span><span class=\"token punctuation\">(<\/span>input<span class=\"token operator\">=<\/span><span class=\"token string\">\"She is third from the bottom\"<\/span><span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<ul id=\"code_id_3\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h4>5.Retrieval<\/h4>\n<p>\u4ee5 Indexes \u7ec4\u4ef6\u4e3a\u4f8b\uff0cIndexs \u6a21\u5757\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u627f\u62c5\u4e86\u6570\u636e\u7d22\u5f15\u7684\u7ba1\u7406\u4efb\u52a1\u3002\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u5229\u7528 Indexs \u6a21\u5757\u521b\u5efa\u7528\u4e8e\u641c\u7d22\u548c\u68c0\u7d22\u6570\u636e\u7684\u7d22\u5f15\u7ed3\u6784\u3002Indexs \u6a21\u5757\u5bf9\u4e8e\u6784\u5efa\u9700\u8981\u8fdb\u884c\u6570\u636e\u641c\u7d22\u548c\u68c0\u7d22\u7684\u5e94\u7528\u7a0b\u5e8f\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<p>\u4f7f\u7528 Indexs \u6a21\u5757\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u6839\u636e\u5e94\u7528\u7a0b\u5e8f\u7684\u9700\u6c42\u521b\u5efa\u4e0d\u540c\u7c7b\u578b\u7684\u7d22\u5f15\uff0c\u5982\u6587\u672c\u7d22\u5f15\u3001\u5173\u952e\u8bcd\u7d22\u5f15\u7b49\u3002\u8fd9\u4e9b\u7d22\u5f15\u7ed3\u6784\u53ef\u4ee5\u9488\u5bf9\u7279\u5b9a\u7684\u6570\u636e\u5c5e\u6027\u6216\u7279\u5f81\u8fdb\u884c\u4f18\u5316\uff0c\u4ee5\u5b9e\u73b0\u66f4\u5feb\u901f\u548c\u7cbe\u786e\u7684\u6570\u636e\u641c\u7d22\u548c\u68c0\u7d22\u3002\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u6839\u636e\u6570\u636e\u7684\u7279\u70b9\u548c\u5e94\u7528\u7a0b\u5e8f\u7684\u9700\u6c42\uff0c\u7075\u6d3b\u5730\u914d\u7f6e\u548c\u7ba1\u7406\u7d22\u5f15\u7ed3\u6784\u3002<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_4\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-javascript\" tabindex=\"0\"><code class=\"language-javascript\">retriever <span class=\"token operator\">=<\/span> db<span class=\"token punctuation\">.<\/span><span class=\"token function\">as_retriever<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\r\n\r\nqa <span class=\"token operator\">=<\/span> RetrievalQA<span class=\"token punctuation\">.<\/span><span class=\"token function\">from_chain_type<\/span><span class=\"token punctuation\">(<\/span>\r\n    llm<span class=\"token operator\">=<\/span>llm<span class=\"token punctuation\">,<\/span> \r\n    chain_type<span class=\"token operator\">=<\/span><span class=\"token string\">\"stuff\"<\/span><span class=\"token punctuation\">,<\/span> \r\n    retriever<span class=\"token operator\">=<\/span>retriever<span class=\"token punctuation\">,<\/span> \r\n    return_source_documents<span class=\"token operator\">=<\/span>True<span class=\"token punctuation\">)<\/span>\r\n\r\nquery <span class=\"token operator\">=<\/span> <span class=\"token string\">\"Forgive me for my unruly, indulgent love of freedom in this life?\"<\/span>\r\nresult <span class=\"token operator\">=<\/span> <span class=\"token function\">qa<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string-property property\">\"query\"<\/span><span class=\"token operator\">:<\/span> query<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span>\r\n\r\n<span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">[<\/span><span class=\"token string\">'result'<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><\/code><\/pre>\n<ul id=\"code_id_4\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<li>9.<\/li>\n<li>10.<\/li>\n<li>11.<\/li>\n<li>12.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h4>6.Calbacks<\/h4>\n<p>LangChain \u63d0\u4f9b\u4e86\u4e00\u4e2a\u56de\u8c03\u7cfb\u7edf\uff0c\u4f7f\u7684\u6211\u4eec\u80fd\u591f\u8fde\u63a5\u5230 LLM \u8bf7\u6c42\u7684\u4e0d\u540c\u9636\u6bb5\u3002\u8fd9\u4e2a\u56de\u8c03\u7cfb\u7edf\u5bf9\u4e8e\u65e5\u5fd7\u8bb0\u5f55\u3001\u76d1\u63a7\u3001\u6d41\u4f20\u8f93\u548c\u5176\u4ed6\u4efb\u52a1\u975e\u5e38\u6709\u7528\u3002<\/p>\n<p>\u901a\u8fc7\u4f7f\u7528\u8fd9\u4e9b\u56de\u8c03\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u7075\u6d3b\u5730\u63a7\u5236\u548c\u7ba1\u7406 LLM \u8bf7\u6c42\u7684\u5404\u4e2a\u9636\u6bb5\u3002\u540c\u65f6\uff0c\u8fd8\u53ef\u4ee5\u6839\u636e\u5e94\u7528\u7a0b\u5e8f\u7684\u9700\u6c42\uff0c\u81ea\u5b9a\u4e49\u56de\u8c03\u51fd\u6570\u7684\u884c\u4e3a\uff0c\u4ee5\u5b9e\u73b0\u7279\u5b9a\u7684\u529f\u80fd\u548c\u903b\u8f91\u3002<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_5\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-javascript\" tabindex=\"0\"><code class=\"language-javascript\"><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">BaseCallbackHandler<\/span><span class=\"token operator\">:<\/span>\r\n    <span class=\"token string\">\"\"<\/span><span class=\"token string\">\"Base callback handler that can be used to handle callbacks from langchain.\"<\/span><span class=\"token string\">\"\"<\/span>\r\n\r\n    def <span class=\"token function\">on_llm_start<\/span><span class=\"token punctuation\">(<\/span>\r\n        self<span class=\"token punctuation\">,<\/span> <span class=\"token literal-property property\">serialized<\/span><span class=\"token operator\">:<\/span> Dict<span class=\"token punctuation\">[<\/span>str<span class=\"token punctuation\">,<\/span> Any<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token literal-property property\">prompts<\/span><span class=\"token operator\">:<\/span> List<span class=\"token punctuation\">[<\/span>str<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">**<\/span>kwargs<span class=\"token operator\">:<\/span> Any\r\n    <span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-<\/span><span class=\"token operator\">&gt;<\/span> Any<span class=\"token operator\">:<\/span>\r\n        <span class=\"token string\">\"\"<\/span><span class=\"token string\">\"Run when LLM starts running.\"<\/span><span class=\"token string\">\"\"<\/span>\r\n\r\n    def <span class=\"token function\">on_chat_model_start<\/span><span class=\"token punctuation\">(<\/span>\r\n        self<span class=\"token punctuation\">,<\/span> <span class=\"token literal-property property\">serialized<\/span><span class=\"token operator\">:<\/span> Dict<span class=\"token punctuation\">[<\/span>str<span class=\"token punctuation\">,<\/span> Any<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token literal-property property\">messages<\/span><span class=\"token operator\">:<\/span> List<span class=\"token punctuation\">[<\/span>List<span class=\"token punctuation\">[<\/span>BaseMessage<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">**<\/span>kwargs<span class=\"token operator\">:<\/span> Any\r\n    <span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-<\/span><span class=\"token operator\">&gt;<\/span> Any<span class=\"token operator\">:<\/span>\r\n        <span class=\"token string\">\"\"<\/span><span class=\"token string\">\"Run when Chat Model starts running.\"<\/span><span class=\"token string\">\"\"<\/span>\r\n\r\n    def <span class=\"token function\">on_llm_new_token<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> <span class=\"token literal-property property\">token<\/span><span class=\"token operator\">:<\/span> str<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">**<\/span>kwargs<span class=\"token operator\">:<\/span> Any<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-<\/span><span class=\"token operator\">&gt;<\/span> Any<span class=\"token operator\">:<\/span>\r\n        <span class=\"token string\">\"\"<\/span><span class=\"token string\">\"Run on new LLM token. Only available when streaming is enabled.\"<\/span><span class=\"token string\">\"\"<\/span><\/code><\/pre>\n<ul id=\"code_id_5\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<li>9.<\/li>\n<li>10.<\/li>\n<li>11.<\/li>\n<li>12.<\/li>\n<li>13.<\/li>\n<li>14.<\/li>\n<li>15.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u901a\u8fc7\u5bf9\u4e0a\u8ff0\u5173\u952e\u7ec4\u4ef6\u7684\u89e3\u6790\uff0c\u6211\u4eec\u53ef\u4ee5\u5927\u81f4\u4e86\u89e3 LangChain \u7684\u5de5\u4f5c\u539f\u7406\u548c\u6d41\u7a0b\uff0c\u5373\u5c06 Agents\u3001Memory\u3001Indexs \u548c\u56de\u8c03\u7cfb\u7edf\u7b49\u5173\u952e\u7ec4\u4ef6\u7ed3\u5408\u8d77\u6765\uff0c\u5b9e\u73b0\u5e94\u7528\u7a0b\u5e8f\u4e0e\u5916\u754c\u7684\u4ea4\u4e92\u3001\u6570\u636e\u7684\u5b58\u50a8\u548c\u7d22\u5f15\uff0c\u4ee5\u53ca\u81ea\u5b9a\u4e49\u64cd\u4f5c\u7684\u6267\u884c\u3002<\/p>\n<p>\u8fd9\u79cd\u7ec4\u5408\u4f7f\u5f97 LangChain \u80fd\u591f\u6784\u5efa\u51fa\u5f3a\u5927\u3001\u7075\u6d3b\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u4e3a\u7528\u6237\u63d0\u4f9b\u4e2a\u6027\u5316\u3001\u667a\u80fd\u5316\u7684\u4f53\u9a8c\u3002\u5177\u4f53\u53ef\u53c2\u8003\u5982\u4e0b\u5de5\u4f5c\u6d41\uff1a<\/p>\n<p><img data-dominant-color=\"f8f9fb\" data-has-transparency=\"false\" style=\"--dominant-color: #f8f9fb;\" loading=\"lazy\" decoding=\"async\" class=\"not-transparent alignnone size-full wp-image-19228\" src=\"https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/a91b6a939da47788789948d5a214e639ed3cf3.png\" width=\"1080\" height=\"599\" alt=\"\" title=\"\u56fe\u7247\" srcset=\"https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/a91b6a939da47788789948d5a214e639ed3cf3.png 1080w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/a91b6a939da47788789948d5a214e639ed3cf3-300x166.png 300w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/a91b6a939da47788789948d5a214e639ed3cf3-1024x568.png 1024w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/a91b6a939da47788789948d5a214e639ed3cf3-150x83.png 150w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/03\/a91b6a939da47788789948d5a214e639ed3cf3-768x426.png 768w\" sizes=\"auto, (max-width: 1080px) 100vw, 1080px\" \/><\/p>\n<p>LLM LangChain \u5de5\u4f5c\u6d41\u7a0b<\/p>\n<h3>\u56db\u3001\u4f7f\u7528 LangChain \u8fdb\u884c LLM \u5e94\u7528\u7a0b\u5e8f\u6784\u5efa<\/h3>\n<p>\u5728\u5f00\u59cb\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u786e\u4fdd\u6b63\u786e\u5b89\u88c5 LangChain \u7684\u8f6f\u4ef6\u5305\uff0c\u5e76\u6309\u7167\u6307\u5357\u8fdb\u884c\u8bbe\u7f6e\u548c\u914d\u7f6e\u3002\u8fd9\u5305\u62ec\u5b89\u88c5\u6240\u9700\u7684\u7f16\u7a0b\u8bed\u8a00\u73af\u5883(\u5982Python)\u3001\u5b89\u88c5 LangChain \u7684\u76f8\u5173\u5e93\u548c\u4f9d\u8d56\u9879\uff0c\u5e76\u8fdb\u884c\u5fc5\u8981\u7684\u914d\u7f6e\u548c\u8bbe\u7f6e\uff0c\u4ee5\u786e\u4fdd LangChain \u53ef\u4ee5\u6b63\u5e38\u8fd0\u884c\u3002<\/p>\n<p>\u4e00\u65e6\u5b89\u88c5\u548c\u8bbe\u7f6e\u5b8c\u6210\uff0c\u6211\u4eec\u53ef\u4ee5\u5f00\u59cb\u5bfc\u5165\u548c\u4f7f\u7528 LLM\u3002\u4e3a\u4e86\u6709\u6548\u4f7f\u7528 LLM\uff0c\u6211\u4eec\u9700\u8981\u5bfc\u5165\u9002\u5f53\u7684\u5e93\u548c\u4f9d\u8d56\u9879\uff0c\u4ee5\u4fbf\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u80fd\u591f\u8c03\u7528\u548c\u4f7f\u7528 LLM \u7684\u529f\u80fd\u3002<\/p>\n<h4>1.\u8bbe\u7f6e LangChain<\/h4>\n<p>\u8fd9\u91cc\uff0c\u4e3b\u8981\u4e3a LangChain \u73af\u5883\u8bbe\u7f6e\u76f8\u5173\u7684\u4f9d\u8d56\u5e93\uff0c\u5177\u4f53\u53ef\u53c2\u8003\u5982\u4e0b\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_6\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-javascript\" tabindex=\"0\"><code class=\"language-javascript\"><span class=\"token keyword\">import<\/span> langchain\r\n<span class=\"token keyword\">import<\/span> openai\r\n<span class=\"token keyword\">import<\/span> os\r\n<span class=\"token keyword\">import<\/span> IPython\r\nfrom langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI\r\nfrom dotenv <span class=\"token keyword\">import<\/span> load_dotenv\r\nfrom langchain<span class=\"token punctuation\">.<\/span>chat_models <span class=\"token keyword\">import<\/span> ChatOpenAI\r\nfrom langchain<span class=\"token punctuation\">.<\/span>schema <span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">(<\/span>\r\n    AIMessage<span class=\"token punctuation\">,<\/span>\r\n    HumanMessage<span class=\"token punctuation\">,<\/span>\r\n    SystemMessage\r\n<span class=\"token punctuation\">)<\/span>\r\nfrom langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings\r\nfrom langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> LLMChain\r\nfrom langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> RetrievalQA\r\nfrom langchain <span class=\"token keyword\">import<\/span> ConversationChain\r\n\r\n<span class=\"token function\">load_dotenv<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\r\n# <span class=\"token constant\">API<\/span> configuration\r\nopenai<span class=\"token punctuation\">.<\/span>api_key <span class=\"token operator\">=<\/span> os<span class=\"token punctuation\">.<\/span><span class=\"token function\">getenv<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"OPENAI_API_KEY\"<\/span><span class=\"token punctuation\">)<\/span><\/code><\/pre>\n<ul id=\"code_id_6\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<li>9.<\/li>\n<li>10.<\/li>\n<li>11.<\/li>\n<li>12.<\/li>\n<li>13.<\/li>\n<li>14.<\/li>\n<li>15.<\/li>\n<li>16.<\/li>\n<li>17.<\/li>\n<li>18.<\/li>\n<li>19.<\/li>\n<li>20.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h4>2.\u521d\u59cb\u5316 LLM<\/h4>\n<p>\u8981\u5728 LangChain \u4e2d\u521d\u59cb\u5316 LLM\uff0c\u9996\u5148\u9700\u8981\u5bfc\u5165\u5fc5\u8981\u7684\u5e93\u548c\u4f9d\u8d56\u9879\u3002\u5982\u679c\u5927\u5bb6\u4f7f\u7528 Python \u7f16\u7a0b\u8bed\u8a00\uff0c\u6211\u4eec\u53ef\u4ee5\u5bfc\u5165\u540d\u4e3a &#8220;langchain&#8221; \u7684\u5e93\uff0c\u5e76\u6307\u5b9a\u8981\u4f7f\u7528\u7684\u8bed\u8a00\u6a21\u578b\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\u7247\u6bb5\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u5bfc\u5165 &#8220;langchain&#8221; \u5e93\u548c\u521d\u59cb\u5316 LLM\uff0c\u5177\u4f53\u53ef\u53c2\u8003\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_7\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-javascript\" tabindex=\"0\"><code class=\"language-javascript\"># \u5bfc\u5165\u5fc5\u8981\u7684\u5e93\u548c\u4f9d\u8d56\u9879\r\n<span class=\"token keyword\">import<\/span> langchain\r\n\r\n# \u6307\u5b9a\u8981\u4f7f\u7528\u7684\u8bed\u8a00\u6a21\u578b\r\nlanguage_model <span class=\"token operator\">=<\/span> <span class=\"token string\">\"gpt3.5-turbo\"<\/span>  # \u8fd9\u91cc\u4f7f\u7528 <span class=\"token constant\">GPT<\/span><span class=\"token operator\">-<\/span><span class=\"token number\">3.5<\/span> Turbo \u6a21\u578b\u4f5c\u4e3a\u793a\u4f8b\r\n\r\n# \u521d\u59cb\u5316 <span class=\"token constant\">LLM<\/span>\r\nllm <span class=\"token operator\">=<\/span> langchain<span class=\"token punctuation\">.<\/span><span class=\"token constant\">LLM<\/span><span class=\"token punctuation\">(<\/span>language_model<span class=\"token punctuation\">)<\/span>\r\n\r\n# \u63a5\u4e0b\u6765\uff0c\u53ef\u4ee5\u4f7f\u7528 llm \u5bf9\u8c61\u6765\u8c03\u7528\u548c\u4f7f\u7528 <span class=\"token constant\">LLM<\/span> \u7684\u5404\u79cd\u529f\u80fd\u548c\u65b9\u6cd5\r\n# \u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528 llm<span class=\"token punctuation\">.<\/span><span class=\"token function\">generate<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> \u65b9\u6cd5\u751f\u6210\u6587\u672c\uff0c\u6216\u4f7f\u7528 llm<span class=\"token punctuation\">.<\/span><span class=\"token function\">complete<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> \u65b9\u6cd5\u8fdb\u884c\u81ea\u52a8\u8865\u5168\u7b49\r\n\r\n# \u793a\u4f8b\uff1a\u4f7f\u7528 <span class=\"token constant\">LLM<\/span> \u751f\u6210\u6587\u672c\r\nprompt <span class=\"token operator\">=<\/span> <span class=\"token string\">\"Hello, LangChain!\"<\/span>\r\nresponse <span class=\"token operator\">=<\/span> llm<span class=\"token punctuation\">.<\/span><span class=\"token function\">generate<\/span><span class=\"token punctuation\">(<\/span>prompt<span class=\"token punctuation\">)<\/span>\r\n<span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span>response<span class=\"token punctuation\">)<\/span><\/code><\/pre>\n<ul id=\"code_id_7\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<li>9.<\/li>\n<li>10.<\/li>\n<li>11.<\/li>\n<li>12.<\/li>\n<li>13.<\/li>\n<li>14.<\/li>\n<li>15.<\/li>\n<li>16.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h4>3.\u8f93\u5165 Prompts<\/h4>\n<p>\u521d\u59cb\u5316 LLM \u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8f93\u5165\u63d0\u793a\u6765\u751f\u6210\u6587\u672c\u6216\u83b7\u53d6\u54cd\u5e94\u3002Prompts \u662f\u8bed\u8a00\u6a21\u578b\u751f\u6210\u6587\u672c\u7684\u8d77\u70b9\u3002\u6839\u636e\u9700\u6c42\uff0c\u6211\u4eec\u53ef\u4ee5\u63d0\u4f9b\u5355\u4e2a\u6216\u591a\u4e2a Prompts\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_8\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-javascript\" tabindex=\"0\"><code class=\"language-javascript\"># \u521d\u59cb\u5316 <span class=\"token constant\">LLM<\/span>\r\nllm <span class=\"token operator\">=<\/span> langchain<span class=\"token punctuation\">.<\/span><span class=\"token constant\">LLM<\/span><span class=\"token punctuation\">(<\/span>language_model<span class=\"token punctuation\">)<\/span>\r\n\r\n# \u63d0\u4f9b\u5355\u4e2a\u63d0\u793a\r\nprompt <span class=\"token operator\">=<\/span> <span class=\"token string\">\"Once upon a time\"<\/span>\r\nresponse <span class=\"token operator\">=<\/span> llm<span class=\"token punctuation\">.<\/span><span class=\"token function\">generate<\/span><span class=\"token punctuation\">(<\/span>prompt<span class=\"token punctuation\">)<\/span>\r\n<span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span>response<span class=\"token punctuation\">)<\/span>\r\n\r\n# \u63d0\u4f9b\u591a\u4e2a\u63d0\u793a\r\nprompts <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span>\r\n    <span class=\"token string\">\"The sun is shining\"<\/span><span class=\"token punctuation\">,<\/span>\r\n    <span class=\"token string\">\"In a galaxy far, far away\"<\/span><span class=\"token punctuation\">,<\/span>\r\n    <span class=\"token string\">\"Once upon a time\"<\/span>\r\n<span class=\"token punctuation\">]<\/span>\r\nresponses <span class=\"token operator\">=<\/span> llm<span class=\"token punctuation\">.<\/span><span class=\"token function\">generate<\/span><span class=\"token punctuation\">(<\/span>prompts<span class=\"token punctuation\">)<\/span>\r\n<span class=\"token keyword\">for<\/span> response <span class=\"token keyword\">in<\/span> <span class=\"token literal-property property\">responses<\/span><span class=\"token operator\">:<\/span>\r\n    <span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span>response<span class=\"token punctuation\">)<\/span><\/code><\/pre>\n<ul id=\"code_id_8\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<li>9.<\/li>\n<li>10.<\/li>\n<li>11.<\/li>\n<li>12.<\/li>\n<li>13.<\/li>\n<li>14.<\/li>\n<li>15.<\/li>\n<li>16.<\/li>\n<li>17.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h4>4.\u68c0\u7d22\u751f\u6210\u7684\u6587\u672c\u6216\u54cd\u5e94<\/h4>\n<p>\u8f93\u5165 Prompts \u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u4ece LLM \u4e2d\u68c0\u7d22\u751f\u6210\u7684\u6587\u672c\u6216\u54cd\u5e94\u3002\u751f\u6210\u7684\u6587\u672c\u6216\u54cd\u5e94\u5c06\u57fa\u4e8e\u6240\u63d0\u4f9b\u7684 Prompts\uff0c\u4ee5\u53ca\u8bed\u8a00\u6a21\u578b\u6240\u5177\u5907\u7684\u4e0a\u4e0b\u6587\u7406\u89e3\u548c\u8bed\u8a00\u751f\u6210\u7684\u529f\u80fd\u3002<\/p>\n<p>\u5f53\u6211\u4eec\u63d0\u4f9b\u4e00\u4e2a\u6216\u591a\u4e2a Prompts \u65f6\uff0cLLM \u4f1a\u4f7f\u7528\u8fd9\u4e9b Prompts \u4f5c\u4e3a\u8d77\u70b9\uff0c\u5e76\u501f\u52a9\u8bed\u8a00\u6a21\u578b\u7684\u80fd\u529b\u6765\u751f\u6210\u76f8\u5173\u7684\u6587\u672c\u3002\u8bed\u8a00\u6a21\u578b\u4f1a\u8003\u8651 Prompts \u4e2d\u7684\u4e0a\u4e0b\u6587\u4fe1\u606f\uff0c\u4ee5\u53ca\u5176\u5728\u8bad\u7ec3\u6570\u636e\u4e2d\u5b66\u4e60\u5230\u7684\u8bed\u8a00\u89c4\u5f8b\u548c\u6982\u7387\u5206\u5e03\u3002\u8fd9\u6837\uff0c\u751f\u6210\u7684\u6587\u672c\u5c06\u4f1a\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u4e0e Prompts \u76f8\u5173\uff0c\u5e76\u4e14\u5177\u5907\u4e00\u5b9a\u7684\u8bed\u6cd5\u5408\u7406\u6027\u548c\u8fde\u8d2f\u6027\u3002<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_9\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-javascript\" tabindex=\"0\"><code class=\"language-javascript\"># Print the generated text\r\n<span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span>generated_text<span class=\"token punctuation\">)<\/span>\r\n\r\n# Print the responses\r\n<span class=\"token keyword\">for<\/span> response <span class=\"token keyword\">in<\/span> <span class=\"token literal-property property\">responses<\/span><span class=\"token operator\">:<\/span>\r\n    <span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span>response<span class=\"token punctuation\">)<\/span><\/code><\/pre>\n<ul id=\"code_id_9\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u603b\u800c\u8a00\u4e4b\uff0c\u901a\u8fc7\u9075\u5faa\u4e0a\u8ff0\u6b65\u9aa4\u5e76\u5b9e\u73b0\u76f8\u5e94\u7684\u4ee3\u7801\uff0c\u6211\u4eec\u53ef\u4ee5\u65e0\u7f1d\u5730\u4f7f\u7528 LangChain \u548c\u9884\u8bad\u7ec3\u7684 LLM\uff0c\u5145\u5206\u5229\u7528\u5b83\u4eec\u5728\u6587\u672c\u751f\u6210\u548c\u7406\u89e3\u4efb\u52a1\u4e0a\u7684\u80fd\u529b\u3002\u8fd9\u4e3a\u6211\u4eec\u89e3\u51b3\u5404\u79cd\u81ea\u7136\u8bed\u8a00\u5904\u7406\u95ee\u9898\u63d0\u4f9b\u4e86\u4e00\u79cd\u9ad8\u6548\u4e14\u7075\u6d3b\u7684\u65b9\u6cd5\u3002\u65e0\u8bba\u662f\u5f00\u53d1\u667a\u80fd\u5bf9\u8bdd\u7cfb\u7edf\u3001\u6784\u5efa\u6587\u672c\u751f\u6210\u5e94\u7528\uff0c\u8fd8\u662f\u8fdb\u884c\u6587\u672c\u7406\u89e3\u548c\u5206\u6790\uff0cLangChain \u548c\u9884\u8bad\u7ec3\u7684 LLM \u90fd\u5c06\u6210\u4e3a\u6709\u529b\u7684\u5de5\u5177\u548c\u6280\u672f\u57fa\u7840\u3002<\/p>\n<p>\u7efc\u4e0a\u6240\u8ff0\uff0c\u5728\u6784\u5efa\u652f\u6301 LLM \u7684\u5e94\u7528\u7a0b\u5e8f\u65b9\u9762\uff0cLangChain \u4e3a\u6211\u4eec\u5f00\u8f9f\u4e86\u4e00\u4e2a\u5145\u6ee1\u65e0\u9650\u53ef\u80fd\u6027\u7684\u4e16\u754c\u3002\u5982\u679c\u5927\u5bb6\u5bf9\u6587\u672c\u5b8c\u6210\u3001\u8bed\u8a00\u7ffb\u8bd1\u3001\u60c5\u611f\u5206\u6790\u3001\u6587\u672c\u6458\u8981\u6216\u547d\u540d\u5b9e\u4f53\u8bc6\u522b\u7b49\u9886\u57df\u611f\u5174\u8da3\uff0cLangChain \u63d0\u4f9b\u4e86\u76f4\u89c2\u6613\u7528\u7684\u5e73\u53f0\u548c\u5f3a\u5927\u7684 API\uff0c\u8ba9\u6211\u4eec\u7684\u60f3\u6cd5\u8f6c\u5316\u4e3a\u73b0\u5b9e\u3002<\/p>\n<p>\u501f\u52a9 LangChain \u548c LLM \u7684\u5f3a\u5927\u80fd\u529b\uff0c\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u51fa\u5177\u5907\u7406\u89e3\u548c\u751f\u6210\u7c7b\u4eba\u6587\u672c\u80fd\u529b\u7684\u667a\u80fd\u5e94\u7528\u7a0b\u5e8f\uff0c\u4ece\u800c\u5f7b\u5e95\u6539\u53d8\u6211\u4eec\u4e0e\u8bed\u8a00\u4ea4\u4e92\u7684\u65b9\u5f0f\u3002<\/p>\n<p>Reference \uff1a<\/p>\n<ul data-id=\"u738a58b-J67GZ9Kd\">\n<li data-id=\"ld70c578-hnhVFGcH\">[1] https:\/\/python.langchain.com\/<\/li>\n<li data-id=\"ld70c578-ncrOBJSB\">[2] https:\/\/machinehack.com\/story\/langchain-to-build-llm-powered-applications<\/li>\n<\/ul>\n<p>\u6587\u7ae0\u6765\u81ea\uff1a51CTO<\/p>\n<\/div>\n<\/div>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_19223\" class=\"pvc_stats total_only  \" data-element-id=\"19223\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" version=\"1.0\" viewBox=\"0 0 502 315\" preserveAspectRatio=\"xMidYMid meet\"><g transform=\"translate(0,332) scale(0.1,-0.1)\" fill=\"\" stroke=\"none\"><path d=\"M2394 3279 l-29 -30 -3 -207 c-2 -182 0 -211 15 -242 39 -76 157 -76 196 0 15 31 17 60 15 243 l-3 209 -33 29 c-26 23 -41 29 -80 29 -41 0 -53 -5 -78 -31z\"\/><path d=\"M3085 3251 c-45 -19 -58 -50 -96 -229 -47 -217 -49 -260 -13 -295 52 -53 146 -42 177 20 16 31 87 366 87 410 0 70 -86 122 -155 94z\"\/><path d=\"M1751 3234 c-13 -9 -29 -31 -37 -50 -12 -29 -10 -49 21 -204 19 -94 39 -189 45 -210 14 -50 54 -80 110 -80 34 0 48 6 76 34 21 21 34 44 34 59 0 14 -18 113 -40 219 -37 178 -43 195 -70 221 -36 32 -101 37 -139 11z\"\/><path d=\"M1163 3073 c-36 -7 -73 -59 -73 -102 0 -56 133 -378 171 -413 34 -32 83 -37 129 -13 70 36 67 87 -16 290 -86 209 -89 214 -129 231 -35 14 -42 15 -82 7z\"\/><path d=\"M3689 3066 c-15 -9 -33 -30 -42 -48 -48 -103 -147 -355 -147 -375 0 -98 131 -148 192 -74 13 15 57 108 97 206 80 196 84 226 37 273 -30 30 -99 39 -137 18z\"\/><path d=\"M583 2784 c-38 -19 -67 -74 -58 -113 9 -42 211 -354 242 -373 16 -10 45 -18 66 -18 51 0 107 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