{"id":15918,"date":"2024-08-21T13:51:06","date_gmt":"2024-08-21T05:51:06","guid":{"rendered":"https:\/\/17aitech.com\/?p=15918"},"modified":"2024-10-08T15:09:11","modified_gmt":"2024-10-08T07:09:11","slug":"%e3%80%90%e8%af%be%e7%a8%8b%e6%80%bb%e7%bb%93%e3%80%91day27%ef%bc%9a%e5%a4%a7%e6%a8%a1%e5%9e%8b%e4%b9%8b%e5%88%9d%e5%a7%8brag","status":"publish","type":"post","link":"https:\/\/17aitech.com\/?p=15918","title":{"rendered":"\u3010\u8bfe\u7a0b\u603b\u7ed3\u3011day27\uff1a\u5927\u6a21\u578b\u4e4b\u521d\u8bc6RAG"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_78 ez-toc-wrap-left-text counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u6587\u7ae0\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/17aitech.com\/?p=15918\/#%E5%89%8D%E8%A8%80\" >\u524d\u8a00<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/17aitech.com\/?p=15918\/#RAG%E6%A6%82%E8%BF%B0\" >RAG\u6982\u8ff0<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/17aitech.com\/?p=15918\/#%E4%BA%A7%E7%94%9F%E8%83%8C%E6%99%AF\" >\u4ea7\u751f\u80cc\u666f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/17aitech.com\/?p=15918\/#%E6%8A%80%E6%9C%AF%E5%8E%9F%E7%90%86\" >\u6280\u672f\u539f\u7406<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/17aitech.com\/?p=15918\/#RAG%E7%9A%84%E6%9C%AC%E8%B4%A8\" >RAG\u7684\u672c\u8d28<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/17aitech.com\/?p=15918\/#RAG%E7%9A%84%E4%BD%BF%E7%94%A8%E5%B7%A5%E4%BD%9C%E6%B5%81%E7%A8%8B\" >RAG\u7684\u4f7f\u7528\u5de5\u4f5c\u6d41\u7a0b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/17aitech.com\/?p=15918\/#RAG%E7%9A%84%E7%9F%A5%E8%AF%86%E5%BA%93%E6%9E%84%E5%BB%BA%E6%B5%81%E7%A8%8B\" >RAG\u7684\u77e5\u8bc6\u5e93\u6784\u5efa\u6d41\u7a0b<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/17aitech.com\/?p=15918\/#%E4%BD%BF%E7%94%A8%E6%96%B9%E6%B3%95\" >\u4f7f\u7528\u65b9\u6cd5<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/17aitech.com\/?p=15918\/#%E5%AE%89%E8%A3%85%E4%BE%9D%E8%B5%96\" >\u5b89\u88c5\u4f9d\u8d56<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/17aitech.com\/?p=15918\/#%E5%85%B7%E4%BD%93%E4%BD%BF%E7%94%A8\" >\u5177\u4f53\u4f7f\u7528<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/17aitech.com\/?p=15918\/#%E5%86%85%E5%AE%B9%E5%B0%8F%E7%BB%93\" >\u5185\u5bb9\u5c0f\u7ed3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/17aitech.com\/?p=15918\/#%E5%8F%82%E8%80%83%E8%B5%84%E6%96%99\" >\u53c2\u8003\u8d44\u6599<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"%E5%89%8D%E8%A8%80\"><\/span>\u524d\u8a00<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u901a\u8fc7\u524d\u51e0\u7ae0\u7684\u5b66\u4e60\uff0c\u6211\u4eec\u5df2\u7ecf\u638c\u63e1\u8fde\u63a5\u4e00\u4e2a\u7b2c\u4e09\u65b9\u5927\u6a21\u578b\uff0c\u4f7f\u7528LangChain\u4e0e\u5927\u6a21\u578b\u5efa\u7acb\u4ea4\u4e92\uff0c\u5e76\u4e14\u901a\u8fc7Prompt\u8fdb\u884c\u63d0\u95ee\uff0c\u5f97\u5230\u76f8\u5e94\u7684\u56de\u7b54\u3002\u672c\u7ae0\u6211\u4eec\u5c06\u5f00\u59cb\u4e86\u89e3RAG\uff08\u68c0\u7d22\u589e\u5f3a\u751f\u6210\uff09\u6280\u672f\uff0c\u4e86\u89e3RAG\u7684\u6280\u672f\u539f\u7406\u4ee5\u53ca\u57fa\u672c\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"RAG%E6%A6%82%E8%BF%B0\"><\/span>RAG\u6982\u8ff0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"%E4%BA%A7%E7%94%9F%E8%83%8C%E6%99%AF\"><\/span>\u4ea7\u751f\u80cc\u666f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u968f\u7740\u4fe1\u606f\u91cf\u7684\u6025\u5267\u589e\u52a0\uff0c\u5355\u7eaf\u4f9d\u9760\u6a21\u578b\u5185\u7f6e\u7684\u77e5\u8bc6\u8fdb\u884c\u751f\u6210\u5df2\u65e0\u6cd5\u6ee1\u8db3\u9700\u6c42\uff0c\u6bd4\u5982\uff1a<\/p>\n<ul>\n<li>\u5927\u6a21\u578b\u7684\u516c\u5171\u77e5\u8bc6\u90fd\u662f\u9648\u65e7\u7684\uff01<\/li>\n<li>\u90e8\u5206\u79c1\u6709\u7684\u77e5\u8bc6\u5927\u6a21\u578b\u6ca1\u6709\u5b66\u4e60\u8fc7&#8230;..<\/li>\n<\/ul>\n<p><code>RAG<\/code>\uff08\u68c0\u7d22\u589e\u5f3a\u751f\u6210\uff09\u6280\u672f\u7684\u51fa\u73b0\u662f\u4e3a\u4e86\u5e94\u5bf9\u4f20\u7edf\u751f\u6210\u6a21\u578b\u5728\u5904\u7406\u5927\u89c4\u6a21\u77e5\u8bc6\u65f6\u7684\u5c40\u9650\u6027\uff0c\u5176\u7ed3\u5408\u4e86\u4fe1\u606f\u68c0\u7d22\u4e0e\u751f\u6210\u6a21\u578b\u7684\u4f18\u52bf\uff0c\u80fd\u591f\u5728\u751f\u6210\u8fc7\u7a0b\u4e2d\u52a8\u6001\u5730\u4ece\u5916\u90e8\u77e5\u8bc6\u5e93\u4e2d\u68c0\u7d22\u76f8\u5173\u4fe1\u606f\uff0c\u4ece\u800c\u63d0\u9ad8\u751f\u6210\u5185\u5bb9\u7684\u51c6\u786e\u6027\u548c\u4e30\u5bcc\u6027\u3002<\/p>\n<blockquote>\n<p>\u79c1\u6709\u77e5\u8bc6\u6ce8\u5165\u65b9\u5f0f\u6709\u4e24\u79cd\uff1a<\/p>\n<ul>\n<li>\u65b9\u6cd5\u4e00\uff1a\uff08\u5b66\u4e60\u5f0f\uff09\u77e5\u8bc6\u6ce8\u5165\uff1a\u6a21\u578b\u5fae\u8c03(fine-tuning)<\/li>\n<li>\u65b9\u6cd5\u4e8c\uff1a\uff08\u5916\u6302\u5f0f\uff09\u77e5\u8bc6\u6ce8\u5165\uff1aRAG system <\/li>\n<\/ul>\n<\/blockquote>\n<h3><span class=\"ez-toc-section\" id=\"%E6%8A%80%E6%9C%AF%E5%8E%9F%E7%90%86\"><\/span>\u6280\u672f\u539f\u7406<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><code>RAG<\/code> \u7684\u6838\u5fc3\u601d\u60f3\u662f\uff1a\u5c06<code>\u4fe1\u606f\u68c0\u7d22<\/code>\u4e0e<code>\u6587\u672c\u751f\u6210<\/code>\u7ed3\u5408\u8d77\u6765\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"RAG%E7%9A%84%E6%9C%AC%E8%B4%A8\"><\/span>RAG\u7684\u672c\u8d28<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>RAG(Retrieval Augmented Generation)\uff0c\u5176\u5927\u91cf\u501f\u9274\u4e86\u63a8\u8350\u7cfb\u7edf\u7684\u4e00\u4e9b\u57fa\u672c\u601d\u60f3\u3002<\/p>\n<ul>\n<li>R\uff1aRetrieval \u68c0\u7d22<\/li>\n<li>A\uff1aAugmentated \u589e\u5f3a<\/li>\n<li>G\uff1aGeneration \u751f\u6210<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"RAG%E7%9A%84%E4%BD%BF%E7%94%A8%E5%B7%A5%E4%BD%9C%E6%B5%81%E7%A8%8B\"><\/span>RAG\u7684\u4f7f\u7528\u5de5\u4f5c\u6d41\u7a0b<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/08\/rag\u7684\u672c\u8d28.png\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/08\/rag\u7684\u672c\u8d28.png\" alt=\"\" \/><\/a><\/p>\n<ol>\n<li><strong>\u7528\u6237\u63d0\u51fa\u95ee\u9898<\/strong>\uff1a<br \/>\n\u7528\u6237\u8f93\u5165\u67e5\u8be2\uff08<code>query<\/code>\uff09\uff0c\u4f8b\u5982\u4e00\u4e2a\u95ee\u9898\u6216\u8bf7\u6c42\u3002<\/li>\n<li><strong>\u95ee\u9898\u4ea4\u7ed9\u68c0\u7d22\u5668<\/strong>\uff1a<br \/>\n\u7cfb\u7edf\u5c06\u7528\u6237\u7684\u67e5\u8be2\u53d1\u9001\u7ed9\u68c0\u7d22\u6a21\u5757\uff08<code>retriever<\/code>\uff09\u3002<\/li>\n<li><strong>\u68c0\u7d22\u76f8\u5173\u4e0a\u4e0b\u6587<\/strong>\uff1a<br \/>\n\u68c0\u7d22\u5668\u6839\u636e\u5411\u91cf\u5316\u6bd4\u5bf9\uff0c\u4ece\u77e5\u8bc6\u5e93\u4e2d\u627e\u5230\u4e0e\u67e5\u8be2\u76f8\u5173\u7684\u4e0a\u4e0b\u6587\u4fe1\u606f\uff08<code>context<\/code>\uff09\u3002<\/li>\n<li><strong>\u805a\u5408\u67e5\u8be2\u548c\u4e0a\u4e0b\u6587<\/strong>\uff1a<br \/>\n\u5c06\u7528\u6237\u7684\u67e5\u8be2\u4e0e\u68c0\u7d22\u5230\u7684\u4e0a\u4e0b\u6587\u4fe1\u606f\u7ed3\u5408\uff0c\u901a\u8fc7\u63d0\u793a\uff08<code>prompt<\/code>\uff09\u8fdb\u884c\u805a\u5408\uff0c\u5f62\u6210\u65b0\u7684\u8f93\u5165\uff1a<code>query<\/code> + <code>context<\/code>\u3002<\/li>\n<li><strong>\u4ea4\u7ed9\u5927\u6a21\u578b\u5904\u7406<\/strong>\uff1a<br \/>\n\u5c06\u805a\u5408\u540e\u7684\u7ed3\u679c\u8f93\u5165\u5230\u5927\u578b\u8bed\u8a00\u6a21\u578b\uff08<code>LLM<\/code>\uff09\u3002<\/li>\n<li><strong>\u751f\u6210\u7b54\u6848<\/strong>\uff1a<br \/>\n\u5927\u6a21\u578b\u53c2\u8003\u4e0a\u4e0b\u6587\u4fe1\u606f\uff0c\u751f\u6210\u5bf9\u7528\u6237\u67e5\u8be2\u7684\u56de\u7b54\uff08<code>answer<\/code>\uff09\u3002<\/li>\n<\/ol>\n<p><strong>\u8f93\u5165\/\u8f93\u51fa\u6982\u8ff0<\/strong>\uff1a<\/p>\n<ul>\n<li>\u8f93\u5165\uff1a<code>query<\/code><\/li>\n<li>\u5904\u7406\uff1a<code>query<\/code> &#8211;&gt; <code>retriever<\/code> &#8211;&gt; <code>context<\/code><\/li>\n<li>\u8f93\u51fa\uff1a<code>query<\/code> + <code>context<\/code> &#8211;&gt; <code>LLM<\/code> &#8211;&gt; <code>answer<\/code><\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"RAG%E7%9A%84%E7%9F%A5%E8%AF%86%E5%BA%93%E6%9E%84%E5%BB%BA%E6%B5%81%E7%A8%8B\"><\/span>RAG\u7684\u77e5\u8bc6\u5e93\u6784\u5efa\u6d41\u7a0b<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/08\/rag\u7684\u6d41\u7a0b.png\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/08\/rag\u7684\u6d41\u7a0b.png\" alt=\"\" \/><\/a><\/p>\n<ol>\n<li><strong>LOAD<\/strong>\uff1a\u6574\u7406\u77e5\u8bc6\u8bed\u6599\n<ul>\n<li>\u8f93\u5165\u683c\u5f0f\uff1a\u652f\u6301\u591a\u79cd\u683c\u5f0f\uff0c\u5305\u62ec PDF\u3001Word\u3001\u6587\u672c\u6587\u4ef6\u3001CSV\u3001PPT\u3001SQL \u7b49\u3002<\/li>\n<li>\u6587\u672c\u62bd\u53d6\uff1a\u4ece\u8f93\u5165\u6587\u4ef6\u4e2d\u62bd\u53d6\u6587\u672c\u5185\u5bb9\uff0c\u53bb\u9664\u6240\u6709\u56fe\u8868\u3001\u97f3\u9891\u3001\u89c6\u9891\u7b49\u591a\u5a92\u4f53\u5143\u7d20\uff0c\u786e\u4fdd\u53ea\u4fdd\u7559\u7eaf\u6587\u672c\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>SPLIT<\/strong>\uff1a\u6587\u672c\u5206\u6bb5\n<ul>\n<li>\u5206\u6bb5\u903b\u8f91\uff1a\u5c06\u6587\u672c\u5212\u5206\u4e3a\u8bed\u4e49\u76f8\u5bf9\u72ec\u7acb\u7684\u6bb5\u843d\uff0c\u4ee5\u4fbf\u4e8e\u540e\u7eed\u5904\u7406\u3002<\/li>\n<li>\u5411\u91cf\u5316\u8981\u6c42\uff1a\u786e\u4fdd\u6bcf\u4e2a\u6bb5\u843d\u7b26\u5408\u5411\u91cf\u5316\u6a21\u578b\u7684\u5b9e\u9645\u9700\u6c42\uff0c\u907f\u514d\u8fc7\u957f\u6216\u8fc7\u77ed\u7684\u6587\u672c\u6bb5\u843d\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>EMBED<\/strong>\uff1a\u5411\u91cf\u5316\n<ul>\n<li>\u5411\u91cf\u5316\u6a21\u578b\uff1a\u4f7f\u7528\u7279\u5b9a\u7684\u5411\u91cf\u5316\u6a21\u578b\uff08\u5982 <code>bge-large-zh-v1.5<\/code> \u6216 <code>BAAI<\/code>\uff09\u5c06\u6587\u672c\u6bb5\u843d\u8f6c\u6362\u4e3a\u5411\u91cf\u8868\u793a\u3002<\/li>\n<li>\u7ef4\u5ea6\uff1a\u751f\u6210\u7684\u5411\u91cf\u901a\u5e38\u4e3a <code>1024<\/code> \u7ef4\u5ea6\uff0c\u4fbf\u4e8e\u540e\u7eed\u7684\u76f8\u4f3c\u5ea6\u8ba1\u7b97\u548c\u68c0\u7d22\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>STORE<\/strong>: \u5b58\u50a8\u81f3\u5411\u91cf\u6570\u636e\u5e93\n<ul>\n<li>\u5411\u91cf\u5e93\uff1a<code>Chroma<\/code> \u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u5411\u91cf\u6570\u636e\u5e93\uff0c\u652f\u6301\u5411\u91cf\u68c0\u7d22\u548c\u5411\u91cf\u76f8\u4f3c\u5ea6\u8ba1\u7b97\u3002<\/li>\n<li>\u6570\u636e\u5e93\u67b6\u6784\uff1a\u91c7\u7528 <code>CS\uff08Client-Server\uff09<\/code>\u67b6\u6784\uff0c\u4ee5\u652f\u6301\u9ad8\u6548\u7684\u68c0\u7d22\u548c\u67e5\u8be2\uff0c\u4e00\u822c\u9700\u8981\u642d\u5efa\u96c6\u7fa4\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p><strong>\u6240\u9700\u7269\u6599\u6982\u8ff0<\/strong>\uff1a<\/p>\n<ul>\n<li>\u5411\u91cf\u6570\u636e\u5e93<\/li>\n<li>\u5411\u91cf\u5316\u6a21\u578b<\/li>\n<li>\u5927\u8bed\u8a00\u6a21\u578b<\/li>\n<li>\u5927\u91cf\u77e5\u8bc6\u8bed\u6599<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"%E4%BD%BF%E7%94%A8%E6%96%B9%E6%B3%95\"><\/span>\u4f7f\u7528\u65b9\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"%E5%AE%89%E8%A3%85%E4%BE%9D%E8%B5%96\"><\/span>\u5b89\u88c5\u4f9d\u8d56<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-bash\">pip install bs4\npip install langchain_chroma<\/code><\/pre>\n<blockquote>\n<p>\u5173\u4e8eLangchain\u5176\u4ed6\u7ec4\u4ef6\u7684\u5b89\u88c5(\u5982\uff1alangchain_community\u7b49)\uff0c\u975e\u672c\u7ae0\u5185\u5bb9\u91cd\u70b9\uff0c\u6240\u4ee5\u4e0d\u505a\u8d58\u8ff0\u3002<\/p>\n<\/blockquote>\n<h4><span class=\"ez-toc-section\" id=\"%E5%85%B7%E4%BD%93%E4%BD%BF%E7%94%A8\"><\/span>\u5177\u4f53\u4f7f\u7528<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><strong>\u7b2c\u4e00\u6b65<\/strong>\uff1a\u8fde\u63a5\u5927\u6a21\u578b<\/p>\n<pre><code class=\"language-python\">from utils import get_ernie_models\nfrom utils import get_qwen_models\n\nllm, chat, embed = get_qwen_models()\n<\/code><\/pre>\n<p><strong>\u7b2c\u4e8c\u6b65<\/strong>\uff1a\u5bfc\u5165\u5fc5\u8981\u7684\u5e93\u548c\u5305<\/p>\n<pre><code class=\"language-python\"># \u89e3\u6790 Web \u9875\u9762\u7684\u5e93\uff08\u7528\u9762\u5411\u5bf9\u8c61\u7684\u65b9\u5f0f\u6765\u5c01\u88c5 HTML \u9875\u9762\uff09\nimport bs4\n# hub \u751f\u6001\u4e2d\u5fc3\nfrom langchain import hub\n# \u5f15\u5165 Chroma \u5411\u91cf\u5e93\nfrom langchain_chroma import Chroma\n# \u5728\u7ebf\u52a0\u8f7d\u7f51\u9875\nfrom langchain_community.document_loaders import WebBaseLoader\n# \u8f93\u51fa\u89e3\u6790\u5668\nfrom langchain_core.output_parsers import StrOutputParser\n# \u53ef\u6267\u884c\u7684\u5360\u4f4d\u7b26\nfrom langchain_core.runnables import RunnablePassthrough\n# \u6587\u6863\u5207\u5206\u5668\nfrom langchain_text_splitters import RecursiveCharacterTextSplitter<\/code><\/pre>\n<p><strong>\u7b2c\u4e09\u6b65<\/strong>\uff1a\u9009\u62e9\u722c\u53d6\u7684\u9875\u9762\u5e76\u52a0\u8f7d\u6570\u636e<\/p>\n<pre><code class=\"language-python\">loader = WebBaseLoader(\n    web_paths=(&quot;https:\/\/17aitech.com\/?p=14624&quot;,),\n    bs_kwargs=dict(\n        parse_only=bs4.SoupStrainer(\n            class_=(&quot;ast-breadcrumbs&quot;, &quot;site-content&quot;, &quot;md-post-toc&quot;)\n        )\n    ),\n)\n\n# \u52a0\u8f7d\u6570\u636e\ndocs = loader.load()<\/code><\/pre>\n<p>\u8865\u5145\u8bf4\u660e\uff1a<\/p>\n<ul>\n<li>LangChain \u5b98\u7f51\u63d0\u4f9b\u7684<a href=\"https:\/\/python.langchain.com\/v0.2\/docs\/tutorials\/qa_chat_history\/\">\u793a\u4f8b\u4ee3\u7801<\/a>\u662f\u4e00\u7bc7\u82f1\u6587\u535a\u5ba2\uff0c\u67e5\u770b\u6548\u679c\u4e0d\u592a\u76f4\u89c2\uff0c\u672c\u4f8b\u4e2d\u7684\u535a\u5ba2\u5730\u5740\u6362\u6210\u4e86\u6211\u7684\u535a\u5ba2\u6587\u7ae0\u3002<\/li>\n<li>\u4e0a\u8ff0class\u7684\u6807\u7b7e\uff0c\u53ef\u4ee5\u901a\u8fc7\u6d4f\u89c8\u5668\u7684\u5f00\u53d1\u8005\u5de5\u5177\u627e\u5230\uff0c\u4f8b\u5982\uff1a<br \/>\n<a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/08\/Dom\u6811\u67e5\u770bclass\u6807\u7b7e.png\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/08\/Dom\u6811\u67e5\u770bclass\u6807\u7b7e.png\" alt=\"\" \/><\/a><\/li>\n<\/ul>\n<p><strong>\u7b2c\u56db\u6b65<\/strong>\uff1a\u6587\u672c\u5206\u5272<\/p>\n<pre><code class=\"language-python\"># \u9012\u5f52\u5f0f \u5b57\u7b26\u7ea7 \u6587\u672c \u5207\u5206\u5668\n&quot;&quot;&quot;\n    chunk_size: \u5efa\u8bae\u6bb5\u843d\u5927\u5c0f\n&quot;&quot;&quot;\ntext_splitter = RecursiveCharacterTextSplitter(chunk_size=500, chunk_overlap=200)\nsplits = text_splitter.split_documents(docs)\nsplits\n<\/code><\/pre>\n<p>\u8fd0\u884c\u6548\u679c\uff1a<br \/>\n<a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/08\/\u6587\u672c\u5206\u5272\u622a\u56fe.png\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/08\/\u6587\u672c\u5206\u5272\u622a\u56fe.png\" alt=\"\" \/><\/a><\/p>\n<p><strong>\u7b2c\u4e94\u6b65<\/strong>\uff1a\u5411\u91cf\u5316\u5e76\u5165\u5e93<\/p>\n<pre><code class=\"language-python\">batch_size = 6  # \u6bcf\u6b21\u5904\u7406\u7684\u6837\u672c\u6570\u91cf\nvectorstore = Chroma(embedding_function=embed)  # \u521d\u59cb\u5316 Chroma \u5411\u91cf\u6570\u636e\u5e93\u5e76\u63d0\u4f9b\u5d4c\u5165\u51fd\u6570\n\n# \u5206\u6279\u5165\u5e93\nfor i in range(0, len(splits), batch_size):\n    batch = splits[i:i + batch_size]  # \u83b7\u53d6\u5f53\u524d\u6279\u6b21\u7684\u6837\u672c\n    vectorstore.add_documents(documents=batch)  # \u5165\u5e93<\/code><\/pre>\n<blockquote>\n<p>\u7531\u4e8e\u963f\u91cc\u63d0\u4f9b\u7684embed\u63a5\u53e3\uff0c\u4e00\u6b21\u53ea\u80fd\u5904\u74066\u4e2a\u6837\u672c\uff0c\u6240\u4ee5\u9700\u8981\u5206\u6279\u5165\u5e93\u3002<\/p>\n<\/blockquote>\n<p><strong>\u7b2c\u516d\u6b65<\/strong>\uff1aRAG\u7cfb\u7edf\u642d\u5efa<\/p>\n<pre><code class=\"language-python\"># \u628a\u5411\u91cf\u64cd\u4f5c\u5c01\u88c5\u4e3a\u4e00\u4e2a\u57fa\u672c\u68c0\u7d22\u5668\nretriever = vectorstore.as_retriever()<\/code><\/pre>\n<p><strong>\u7b2c\u4e03\u6b65<\/strong>\uff1a\u6784\u9020RAG\u7cfb\u7edf\u7684Prompt\uff08\u6838\u5fc3\u90e8\u5206\uff09<\/p>\n<pre><code class=\"language-python\">\nfrom langchain_core.prompts import ChatPromptTemplate\n\n# RAG\u7cfb\u7edf\u7ecf\u5178\u7684 Prompt (A \u589e\u5f3a\u7684\u8fc7\u7a0b)\nprompt = ChatPromptTemplate.from_messages([\n  (&quot;human&quot;, &quot;&quot;&quot;You are an assistant for question-answering tasks. Use the following pieces \n  of retrieved context to answer the question. \n  If you don&#039;t know the answer, just say that you don&#039;t know. \n  Use three sentences maximum and keep the answer concise.\n  Question: {question} \n  Context: {context} \n  Answer:&quot;&quot;&quot;)\n])<\/code><\/pre>\n<p><strong>\u7b2c\u516b\u6b65<\/strong>\uff1a\u6784\u5efaRAG\u94fe<\/p>\n<pre><code class=\"language-python\">def format_docs(docs):\n    &quot;&quot;&quot;\n    \u5c06\u68c0\u7d22\u5230\u7684\u6587\u6863\u5217\u8868\u683c\u5f0f\u5316\u4e3a\u4e00\u4e2a\u5927\u5b57\u7b26\u4e32\u3002\n\n    \u53c2\u6570\uff1a\n    docs (list): \u5305\u542b\u6587\u6863\u5bf9\u8c61\u7684\u5217\u8868\uff0c\u6bcf\u4e2a\u6587\u6863\u5bf9\u8c61\u5e94\u5177\u6709 `page_content` \u5c5e\u6027\u3002\n\n    \u8fd4\u56de\uff1a\n    str: \u4e00\u4e2a\u7531\u6587\u6863\u5185\u5bb9\u7ec4\u6210\u7684\u5927\u5b57\u7b26\u4e32\uff0c\u6587\u6863\u4e4b\u95f4\u7528\u4e24\u4e2a\u6362\u884c\u7b26\u5206\u9694\u3002\n    &quot;&quot;&quot;\n    return &quot;\\n\\n&quot;.join(doc.page_content for doc in docs)\n\n# RAG \u94fe\nrag_chain = (\n    {&quot;context&quot;: retriever | format_docs, \n     &quot;question&quot;: RunnablePassthrough()}\n    | prompt\n    | chat\n    | StrOutputParser()\n)<\/code><\/pre>\n<p><strong>\u7b2c\u4e5d\u6b65<\/strong>\uff1a\u63d0\u95ee\u95ee\u9898\uff0c\u6d4b\u8bd5RAG\u7cfb\u7edf<\/p>\n<pre><code class=\"language-python\">rag_chain.invoke(input=&quot;Prompt\u521d\u6b65\u4e86\u89e3\u6587\u7ae0\u4e2d\uff0c\u4f5c\u8005\u793a\u4f8b\u4e2d\u7684Langserve\u63a5\u53e3\u7684IP\u5730\u5740\u662f\u591a\u5c11?&quot;)\n<\/code><\/pre>\n<p>\u8fd0\u884c\u7ed3\u679c\uff1a<br \/>\n<a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/08\/\u6d4b\u8bd5RAG\u7cfb\u7edf\u7684\u622a\u56fe.png\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/08\/\u6d4b\u8bd5RAG\u7cfb\u7edf\u7684\u622a\u56fe.png\" alt=\"\" \/><\/a><\/p>\n<p>\u901a\u8fc7\u67e5\u770b\u6587\u7ae0<a href=\"https:\/\/17aitech.com\/?p=14624#toc-16\">\u3010\u8bfe\u7a0b\u603b\u7ed3\u3011day25\uff1a\u5927\u6a21\u578b\u5e94\u7528\u5f00\u53d1\u4e4bPrompt\u521d\u6b65\u4e86\u89e3<\/a>\u4e2d<strong>\u6d4b\u8bd5API\u63a5\u53e3<\/strong>\u7ae0\u8282\uff0c\u5176\u4e2d\u6211\u90e8\u7f72\u5230\u4e91\u670d\u52a1\u5668\u7684IP\u5730\u5740\u7684\u786e\u4e3a\u4e0a\u8ff0\u5730\u5740\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E5%86%85%E5%AE%B9%E5%B0%8F%E7%BB%93\"><\/span>\u5185\u5bb9\u5c0f\u7ed3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>RAG\u7cfb\u7edf\u662f\u4e00\u79cd\u57fa\u4e8e\u5927\u8bed\u8a00\u6a21\u578b\u7684\u95ee\u7b54\u7cfb\u7edf\uff0c\u901a\u8fc7\u5411\u91cf\u68c0\u7d22\u548c\u5411\u91cf\u5316\u6280\u672f\uff0c\u5b9e\u73b0\u5bf9\u6d77\u91cf\u77e5\u8bc6\u8d44\u6e90\u7684\u9ad8\u6548\u68c0\u7d22\u548c\u95ee\u7b54\u3002<\/li>\n<li>RAG\u7684\u77e5\u8bc6\u5e93\u6784\u5efa\u6d41\u7a0b\u4e3a\uff1a\u6574\u7406\u77e5\u8bc6\u8bed\u6599\uff08<code>LOAD<\/code>\uff09-&gt; \u6587\u672c\u5206\u6bb5\uff08<code>SPLIT<\/code>\uff09-&gt; \u5411\u91cf\u5316\uff08<code>EMBED<\/code>\uff09 -&gt; \u5b58\u50a8\u81f3\u5411\u91cf\u6570\u636e\u5e93\uff08<code>STORE<\/code>\uff09\u3002<\/li>\n<li>RAG\u7684\u4f7f\u7528\u6d41\u7a0b\u4e3a\uff1a\u7528\u6237\u63d0\u51fa\u95ee\u9898(<code>query<\/code>) -&gt; \u95ee\u9898\u4ea4\u7ed9\u68c0\u7d22\u5668\uff08<code>retriever<\/code>\uff09-&gt; \u68c0\u7d22\u76f8\u5173\u4e0a\u4e0b\u6587\uff08<code>context<\/code>\uff09 -&gt; \u805a\u5408\u67e5\u8be2\u548c\u4e0a\u4e0b\u6587\uff08<code>query<\/code> + <code>context<\/code>\uff09 -&gt; \u4ea4\u7ed9\u5927\u6a21\u578b\u5904\u7406\uff08<code>LLM<\/code>\uff09 -&gt; \u751f\u6210\u7b54\u6848\uff08<code>answer<\/code>\uff09<\/li>\n<li>RAG\u7684\u6838\u5fc3\u90e8\u5206\uff1a\u5373\u901a\u8fc7\u6784\u5efa\u4e00\u4e2a<code>Prompt<\/code>\uff0c\u8be5 <code>Prompt<\/code> \u5305\u542b <code class=\"kb-btn\">question<\/code> \u7528\u6237\u63d0\u51fa\u7684\u95ee\u9898 \u548c <code class=\"kb-btn\">context<\/code> \u5411\u91cf\u5e93\u4e2d\u68c0\u7d22\u5230\u7684\u4e0a\u4e0b\u6587\uff0c\u7136\u540e\u4ea4\u7ed9\u5927\u6a21\u578b\uff0c\u8ba9\u5927\u6a21\u578b\u6839\u636e\u4e0a\u4e0b\u6587\u7ed9\u51fa<code>Answer<\/code>\u3002<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"%E5%8F%82%E8%80%83%E8%B5%84%E6%96%99\"><\/span>\u53c2\u8003\u8d44\u6599<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/python.langchain.com\/v0.2\/docs\/tutorials\/qa_chat_history\/\">Conversational RAG<\/a><\/p>\n<p align=\"center\">\u6b22\u8fce\u5173\u6ce8\u516c\u4f17\u53f7\u4ee5\u83b7\u5f97\u6700\u65b0\u7684\u6587\u7ae0\u548c\u65b0\u95fb<\/p>\n<p><a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/09\/\u626b\u7801_\u641c\u7d22\u8054\u5408\u4f20\u64ad\u6837\u5f0f-\u767d\u8272\u7248.bmp\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/09\/\u626b\u7801_\u641c\u7d22\u8054\u5408\u4f20\u64ad\u6837\u5f0f-\u767d\u8272\u7248.bmp\" alt=\"\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00 \u901a\u8fc7\u524d\u51e0\u7ae0\u7684\u5b66\u4e60\uff0c\u6211\u4eec\u5df2\u7ecf\u638c\u63e1\u8fde\u63a5 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":15942,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"aside","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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