{"id":76523,"date":"2026-02-22T17:42:17","date_gmt":"2026-02-22T09:42:17","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/76523.html"},"modified":"2026-02-22T17:42:17","modified_gmt":"2026-02-22T09:42:17","slug":"%e5%be%ae%e8%b0%83%e6%a8%a1%e5%9e%8b%e6%88%90%e6%9c%ac%e5%a4%aa%e9%ab%98%ef%bc%8c%e7%94%a8rag%e6%8a%80%e6%9c%af%ef%bc%8c%e4%bd%8e%e6%88%90%e6%9c%ac%e5%ae%9e%e7%8e%b0ai%e5%8d%87%e7%ba%a7","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/76523.html","title":{"rendered":"\u5fae\u8c03\u6a21\u578b\u6210\u672c\u592a\u9ad8\uff0c\u7528RAG\u6280\u672f\uff0c\u4f4e\u6210\u672c\u5b9e\u73b0AI\u5347\u7ea7"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260222094214-699acf76d5144.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\u5927\u6a21\u578b RAG \u6280\u672f\u6df1\u5ea6\u89e3\u6790&#xff1a;\u4ece\u5165\u95e8\u5230\u8fdb\u9636<\/li>\n<li>\n<ul>\n<li>\u4e00\u3001\u5927\u8bed\u8a00\u6a21\u578b&#xff08;LLM&#xff09;\u7684\u4e09\u5927\u75db\u70b9<\/li>\n<li>\n<ul>\n<li>1.1 \u5e7b\u89c9\u95ee\u9898&#xff1a;\u4e00\u672c\u6b63\u7ecf\u5730\u80e1\u8bf4\u516b\u9053<\/li>\n<li>1.2 \u65f6\u6548\u6027\u95ee\u9898&#xff1a;\u77e5\u8bc6\u66f4\u65b0\u4e0d\u53ca\u65f6<\/li>\n<li>1.3 \u6570\u636e\u5b89\u5168\u95ee\u9898&#xff1a;\u654f\u611f\u4fe1\u606f\u6cc4\u9732\u98ce\u9669<\/li>\n<\/ul>\n<\/li>\n<li>\u4e8c\u3001RAG \u6280\u672f&#xff1a;\u68c0\u7d22\u589e\u5f3a\u751f\u6210<\/li>\n<li>\n<ul>\n<li>2.1 RAG \u7684\u5b9a\u4e49<\/li>\n<li>2.2 RAG \u7684\u67b6\u6784<\/li>\n<li>\n<ul>\n<li>2.2.1 \u68c0\u7d22\u5668\u6a21\u5757<\/li>\n<li>2.2.2 \u751f\u6210\u5668\u6a21\u5757<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u4e09\u3001\u4f7f\u7528 RAG \u7684\u516b\u5927\u4f18\u52bf<\/li>\n<li>\n<ul>\n<li>3.1 \u53ef\u6269\u5c55\u6027&#xff1a;\u51cf\u5c11\u6a21\u578b\u5927\u5c0f\u548c\u8bad\u7ec3\u6210\u672c<\/li>\n<li>3.2 \u51c6\u786e\u6027&#xff1a;\u901a\u8fc7\u5f15\u7528\u4fe1\u606f\u6765\u6e90\u589e\u5f3a\u4fe1\u4efb<\/li>\n<li>3.3 \u53ef\u63a7\u6027&#xff1a;\u5141\u8bb8\u66f4\u65b0\u6216\u5b9a\u5236\u77e5\u8bc6<\/li>\n<li>3.4 \u53ef\u89e3\u91ca\u6027&#xff1a;\u68c0\u7d22\u5230\u7684\u9879\u76ee\u4f5c\u4e3a\u6a21\u578b\u9884\u6d4b\u4e2d\u6765\u6e90\u7684\u53c2\u8003<\/li>\n<li>3.5 \u591a\u529f\u80fd\u6027&#xff1a;\u9002\u7528\u4e8e\u591a\u79cd\u4efb\u52a1<\/li>\n<li>3.6 \u53ca\u65f6\u6027&#xff1a;\u8bc6\u522b\u6700\u65b0\u7684\u4fe1\u606f<\/li>\n<li>3.7 \u5b9a\u5236\u6027&#xff1a;\u4e3a\u4e0d\u540c\u9886\u57df\u63d0\u4f9b\u4e13\u4e1a\u7684\u77e5\u8bc6\u652f\u6301<\/li>\n<li>3.8 \u5b89\u5168\u6027&#xff1a;\u66f4\u597d\u5730\u63a7\u5236\u6570\u636e\u4f7f\u7528<\/li>\n<\/ul>\n<\/li>\n<li>\u56db\u3001RAG \u4e0e SFT \u7684\u5bf9\u6bd4<\/li>\n<li>\n<ul>\n<li>4.1 \u6570\u636e\u5904\u7406\u65b9\u5f0f<\/li>\n<\/ul>\n<\/li>\n<li>\u4e94\u3001RAG \u7684\u5178\u578b\u5b9e\u73b0\u65b9\u6cd5<\/li>\n<li>\n<ul>\n<li>5.1 \u6570\u636e\u7d22\u5f15<\/li>\n<li>5.2 \u6570\u636e\u68c0\u7d22<\/li>\n<li>5.3 \u6587\u672c\u751f\u6210<\/li>\n<\/ul>\n<\/li>\n<li>\u516d\u3001RAG \u7684\u5178\u578b\u6848\u4f8b<\/li>\n<li>\n<ul>\n<li>6.1 ChatPDF \u53ca\u5176\u590d\u523b\u7248<\/li>\n<li>6.2 Baichuan<\/li>\n<li>6.3 Multi-modal retrieval-based LMs<\/li>\n<\/ul>\n<\/li>\n<li>\u4e03\u3001RAG \u5b58\u5728\u7684\u95ee\u9898<\/li>\n<li>\n<ul>\n<li>7.1 \u68c0\u7d22\u6548\u679c\u4f9d\u8d56 embedding \u548c\u68c0\u7d22\u7b97\u6cd5<\/li>\n<li>7.2 \u5927\u6a21\u578b\u5982\u4f55\u5229\u7528\u68c0\u7d22\u5230\u7684\u4fe1\u606f\u4ecd\u662f\u9ed1\u76d2<\/li>\n<li>7.3 \u6548\u7387\u95ee\u9898&#xff1a;\u65e0\u5dee\u522b\u68c0\u7d22\u6240\u6709\u4efb\u52a1<\/li>\n<li>7.4 \u65e0\u6cd5\u7cbe\u51c6\u67e5\u8bc1\u4e8b\u5b9e<\/li>\n<\/ul>\n<\/li>\n<li>\u516b\u3001RAG \u7684\u62d3\u5c55\u65b9\u6848<\/li>\n<li>\n<ul>\n<li>8.1 \u591a\u6a21\u6001 RAG<\/li>\n<li>8.2 \u5b9e\u65f6 RAG<\/li>\n<li>8.3 \u4e2a\u6027\u5316 RAG<\/li>\n<\/ul>\n<\/li>\n<li>\u4e5d\u3001\u4e92\u52a8\u4e0e\u4ea4\u6d41<\/li>\n<li>\n<ul>\n<li>9.1 \u8bc4\u8bba\u533a\u4e92\u52a8<\/li>\n<li>9.2 \u8f6c\u8f7d\u58f0\u660e<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>\u5927\u6a21\u578b RAG \u6280\u672f\u6df1\u5ea6\u89e3\u6790&#xff1a;\u4ece\u5165\u95e8\u5230\u8fdb\u9636<\/h2>\n<h3>\u4e00\u3001\u5927\u8bed\u8a00\u6a21\u578b&#xff08;LLM&#xff09;\u7684\u4e09\u5927\u75db\u70b9<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260222094215-699acf773908a.png\" alt=\"\u5927\u8bed\u8a00\u6a21\u578b\u75db\u70b9\" \/><\/p>\n<h4>1.1 \u5e7b\u89c9\u95ee\u9898&#xff1a;\u4e00\u672c\u6b63\u7ecf\u5730\u80e1\u8bf4\u516b\u9053<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;LLM \u7684\u6587\u672c\u751f\u6210\u662f\u57fa\u4e8e\u6982\u7387\u7684 token by token \u5f62\u5f0f&#xff0c;\u5b83\u4f1a\u6839\u636e\u8bad\u7ec3\u6570\u636e\u4e2d\u7684\u6a21\u5f0f\u751f\u6210\u6700\u53ef\u80fd\u7684\u4e0b\u4e00\u4e2a token&#xff0c;\u4f46\u5e76\u4e0d\u7406\u89e3\u8bed\u4e49\u7684\u6b63\u786e\u6027\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4e00\u4e2a\u5b66\u751f\u8003\u8bd5\u65f6\u9047\u5230\u4e0d\u4f1a\u7684\u9898\u76ee&#xff0c;\u51ed\u501f\u8bb0\u5fc6\u4e2d\u7684\u7247\u6bb5\u778e\u8499\u7b54\u6848&#xff0c;\u867d\u7136\u770b\u8d77\u6765\u50cf\u6a21\u50cf\u6837&#xff0c;\u4f46\u5b9e\u9645\u4e0a\u53ef\u80fd\u5b8c\u5168\u9519\u8bef\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u95ee AI&#xff1a;\u201c\u592a\u9633\u4e3a\u4ec0\u4e48\u4ece\u897f\u8fb9\u5347\u8d77&#xff1f;\u201d&#xff0c;\u5b83\u53ef\u80fd\u4f1a\u4e00\u672c\u6b63\u7ecf\u5730\u89e3\u91ca:\u201c\u56e0\u4e3a\u5730\u7403\u81ea\u8f6c\u65b9\u5411\u53d1\u751f\u4e86\u6539\u53d8\u201d&#xff0c;\u800c\u5b9e\u9645\u4e0a\u592a\u9633\u6839\u672c\u4e0d\u4f1a\u4ece\u897f\u8fb9\u5347\u8d77\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> transformers <span class=\"token keyword\">import<\/span> pipeline<br \/>\n\u200b<br \/>\ngenerator <span class=\"token operator\">&#061;<\/span> pipeline<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;text-generation&#039;<\/span><span class=\"token punctuation\">,<\/span> model<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#039;gpt2&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> generator<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u592a\u9633\u4e3a\u4ec0\u4e48\u4ece\u897f\u8fb9\u5347\u8d77&#xff1f;&#034;<\/span><span class=\"token punctuation\">,<\/span> max_length<span class=\"token operator\">&#061;<\/span><span class=\"token number\">100<\/span><span class=\"token punctuation\">,<\/span> num_return_sequences<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;generated_text&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h4>1.2 \u65f6\u6548\u6027\u95ee\u9898&#xff1a;\u77e5\u8bc6\u66f4\u65b0\u4e0d\u53ca\u65f6<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;\u5927\u578b\u8bed\u8a00\u6a21\u578b\u7684\u8bad\u7ec3\u6210\u672c\u6781\u9ad8&#xff0c;\u5468\u671f\u957f&#xff0c;\u5bfc\u81f4\u5b9e\u65f6\u6027\u5f3a\u7684\u6570\u636e\u65e0\u6cd5\u53ca\u65f6\u53c2\u4e0e\u8bad\u7ec3&#xff0c;\u6a21\u578b\u65e0\u6cd5\u56de\u7b54\u65f6\u6548\u6027\u76f8\u5173\u7684\u95ee\u9898\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4e00\u4e2a\u53ea\u4f1a\u80cc\u8bf5\u4e94\u5e74\u524d\u8bfe\u672c\u77e5\u8bc6\u7684\u5b66\u751f&#xff0c;\u65e0\u6cd5\u56de\u7b54\u6700\u65b0\u7684\u79d1\u6280\u8fdb\u5c55\u6216\u70ed\u70b9\u4e8b\u4ef6\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u5728 2026 \u5e74\u95ee AI&#xff1a;\u201c2026 \u5e74\u7684\u6625\u8282\u662f\u54ea\u4e00\u5929&#xff1f;\u201d&#xff0c;\u5982\u679c AI \u7684\u8bad\u7ec3\u6570\u636e\u622a\u6b62\u5230 2023 \u5e74&#xff0c;\u5b83\u53ef\u80fd\u65e0\u6cd5\u7ed9\u51fa\u6b63\u786e\u7b54\u6848\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> datetime <span class=\"token keyword\">import<\/span> datetime<br \/>\n<span class=\"token keyword\">import<\/span> requests<br \/>\n\u200b<br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">get_current_time<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> datetime<span class=\"token punctuation\">.<\/span>now<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>strftime<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%Y-%m-%d %H:%M:%S&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">get_latest_news<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    response <span class=\"token operator\">&#061;<\/span> requests<span class=\"token punctuation\">.<\/span>get<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;https:\/\/newsapi.org\/v2\/top-headlines?country&#061;cn&amp;apiKey&#061;YOUR_API_KEY&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> response<span class=\"token punctuation\">.<\/span>json<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;\u5f53\u524d\u65f6\u95f4: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>get_current_time<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;\u6700\u65b0\u65b0\u95fb: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>get_latest_news<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h4>1.3 \u6570\u636e\u5b89\u5168\u95ee\u9898&#xff1a;\u654f\u611f\u4fe1\u606f\u6cc4\u9732\u98ce\u9669<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;\u901a\u7528 LLM \u6ca1\u6709\u4f01\u4e1a\u5185\u90e8\u6570\u636e\u548c\u7528\u6237\u6570\u636e&#xff0c;\u4f01\u4e1a\u60f3\u8981\u5728\u4fdd\u8bc1\u5b89\u5168\u7684\u524d\u63d0\u4e0b\u4f7f\u7528 LLM&#xff0c;\u6700\u597d\u7684\u65b9\u5f0f\u662f\u5c06\u6570\u636e\u653e\u5728\u672c\u5730&#xff0c;\u4ec5\u8ba9\u5728\u7ebf\u5927\u6a21\u578b\u5b8c\u6210\u5f52\u7eb3\u529f\u80fd\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4f60\u4e0d\u4f1a\u628a\u516c\u53f8\u7684\u673a\u5bc6\u6587\u4ef6\u4ea4\u7ed9\u4e00\u4e2a\u964c\u751f\u4eba\u4fdd\u7ba1&#xff0c;\u800c\u662f\u81ea\u5df1\u59a5\u5584\u4fdd\u5b58&#xff0c;\u53ea\u5728\u9700\u8981\u7684\u65f6\u5019\u8ba9\u4ed6\u4eba\u5e2e\u5fd9\u6574\u7406\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u94f6\u884c\u4e0d\u4f1a\u5c06\u7528\u6237\u7684\u8d26\u6237\u4fe1\u606f\u76f4\u63a5\u8f93\u5165\u5230\u516c\u5171 LLM \u4e2d\u8fdb\u884c\u5904\u7406&#xff0c;\u800c\u662f\u5148\u5728\u672c\u5730\u5904\u7406\u654f\u611f\u4fe1\u606f&#xff0c;\u518d\u5c06\u5904\u7406\u540e\u7684\u7ed3\u679c\u53d1\u9001\u7ed9 LLM \u8fdb\u884c\u5206\u6790\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>prompts <span class=\"token keyword\">import<\/span> PromptTemplate<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> LLMChain<br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u672c\u5730\u5904\u7406\u654f\u611f\u6570\u636e<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">process_sensitive_data<\/span><span class=\"token punctuation\">(<\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token comment\"># \u8131\u654f\u5904\u7406<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> data<span class=\"token punctuation\">.<\/span>replace<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u654f\u611f\u4fe1\u606f&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;***&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u521d\u59cb\u5316LLM<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u521b\u5efaPrompt\u6a21\u677f<\/span><br \/>\nprompt <span class=\"token operator\">&#061;<\/span> PromptTemplate<span class=\"token punctuation\">(<\/span><br \/>\n    input_variables<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;data&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    template<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;\u5206\u6790\u4ee5\u4e0b\u6570\u636e&#xff1a;{data}&#034;<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u521b\u5efaLLM Chain<\/span><br \/>\nchain <span class=\"token operator\">&#061;<\/span> LLMChain<span class=\"token punctuation\">(<\/span>llm<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span> prompt<span class=\"token operator\">&#061;<\/span>prompt<span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u5904\u7406\u654f\u611f\u6570\u636e<\/span><br \/>\nsensitive_data <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u7528\u6237\u7684\u654f\u611f\u4fe1\u606f&#xff1a;1234567890&#034;<\/span><br \/>\nprocessed_data <span class=\"token operator\">&#061;<\/span> process_sensitive_data<span class=\"token punctuation\">(<\/span>sensitive_data<span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u8c03\u7528LLM\u8fdb\u884c\u5206\u6790<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> chain<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span>processed_data<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<h3>\u4e8c\u3001RAG \u6280\u672f&#xff1a;\u68c0\u7d22\u589e\u5f3a\u751f\u6210<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260222094215-699acf7751516.png\" alt=\"RAG \u6280\u672f\" \/><\/p>\n<h4>2.1 RAG \u7684\u5b9a\u4e49<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;RAG&#xff08;Retrieval-Augmented Generation&#xff0c;\u68c0\u7d22\u589e\u5f3a\u751f\u6210&#xff09;\u662f\u6307 LLM \u5728\u56de\u7b54\u95ee\u9898\u6216\u751f\u6210\u6587\u672c\u65f6&#xff0c;\u5148\u4ece\u5927\u91cf\u6587\u6863\u4e2d\u68c0\u7d22\u51fa\u76f8\u5173\u7684\u4fe1\u606f&#xff0c;\u7136\u540e\u57fa\u4e8e\u8fd9\u4e9b\u4fe1\u606f\u751f\u6210\u56de\u7b54\u6216\u6587\u672c&#xff0c;\u4ece\u800c\u63d0\u9ad8\u9884\u6d4b\u8d28\u91cf\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u5b66\u751f\u8003\u8bd5\u65f6&#xff0c;\u53ef\u4ee5\u67e5\u9605\u8bfe\u672c\u8d44\u6599&#xff0c;\u7136\u540e\u57fa\u4e8e\u8d44\u6599\u56de\u7b54\u95ee\u9898&#xff0c;\u800c\u4e0d\u662f\u4ec5\u51ed\u8bb0\u5fc6\u778e\u8499\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u95ee AI&#xff1a;\u201c\u5982\u4f55\u505a\u7ea2\u70e7\u8089&#xff1f;\u201d&#xff0c;RAG \u6280\u672f\u4f1a\u5148\u68c0\u7d22\u76f8\u5173\u7684\u83dc\u8c31\u6587\u6863&#xff0c;\u7136\u540e\u57fa\u4e8e\u8fd9\u4e9b\u6587\u6863\u751f\u6210\u8be6\u7ec6\u7684\u7ea2\u70e7\u8089\u505a\u6cd5\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> RetrievalQA<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b\u548c\u5411\u91cf\u6570\u636e\u5e93<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>from_texts<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;\u7ea2\u70e7\u8089\u7684\u505a\u6cd5&#xff1a;1. \u51c6\u5907\u98df\u6750&#8230;&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u521d\u59cb\u5316LLM<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u521b\u5efa\u68c0\u7d22QA\u94fe<\/span><br \/>\nqa_chain <span class=\"token operator\">&#061;<\/span> RetrievalQA<span class=\"token punctuation\">.<\/span>from_chain_type<span class=\"token punctuation\">(<\/span><br \/>\n    llm<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span><br \/>\n    chain_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;stuff&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    retriever<span class=\"token operator\">&#061;<\/span>db<span class=\"token punctuation\">.<\/span>as_retriever<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u63d0\u95ee<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> qa_chain<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5982\u4f55\u505a\u7ea2\u70e7\u8089&#xff1f;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<h4>2.2 RAG \u7684\u67b6\u6784<\/h4>\n<p>RAG \u6280\u672f\u4e3b\u8981\u5305\u542b\u4e24\u4e2a\u6838\u5fc3\u6a21\u5757&#xff1a;\u68c0\u7d22\u5668&#xff08;R&#xff09;\u548c\u751f\u6210\u5668&#xff08;G&#xff09;\u3002<\/p>\n<h5>2.2.1 \u68c0\u7d22\u5668\u6a21\u5757<\/h5>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;\u68c0\u7d22\u5668\u7684\u4f5c\u7528\u662f\u4ece\u5927\u91cf\u77e5\u8bc6\u5e93\u4e2d\u68c0\u7d22\u51fa\u6700\u76f8\u5173\u7684\u524d k \u4e2a\u6587\u6863\u3002\u6784\u5efa\u9ad8\u8d28\u91cf\u7684\u68c0\u7d22\u5668\u9700\u8981\u89e3\u51b3\u4e09\u4e2a\u5173\u952e\u95ee\u9898&#xff1a;\u5982\u4f55\u83b7\u5f97\u51c6\u786e\u7684\u8bed\u4e49\u8868\u793a&#xff1f;\u5982\u4f55\u534f\u8c03\u67e5\u8be2\u548c\u6587\u6863\u7684\u8bed\u4e49\u7a7a\u95f4&#xff1f;\u5982\u4f55\u5bf9\u9f50\u68c0\u7d22\u6a21\u578b\u7684\u8f93\u51fa\u548c\u5927\u8bed\u8a00\u6a21\u578b\u7684\u504f\u597d&#xff1f;<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u56fe\u4e66\u9986\u7684\u56fe\u4e66\u7ba1\u7406\u5458&#xff0c;\u80fd\u591f\u6839\u636e\u8bfb\u8005\u7684\u9700\u6c42\u5feb\u901f\u627e\u5230\u6700\u76f8\u5173\u7684\u4e66\u7c4d\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u5728\u641c\u7d22\u5f15\u64ce\u4e2d\u8f93\u5165&#034;\u5982\u4f55\u5b66\u4e60 Python&#034;&#xff0c;\u641c\u7d22\u5f15\u64ce\u4f1a\u6839\u636e\u4f60\u7684\u68c0\u7d22\u8bcd&#xff0c;\u4ece\u6d77\u91cf\u7f51\u9875\u4e2d\u627e\u5230\u6700\u76f8\u5173\u7684\u5b66\u4e60\u8d44\u6e90\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u521b\u5efa\u5411\u91cf\u6570\u636e\u5e93<\/span><br \/>\ndocuments <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;Python\u5b66\u4e60\u8d44\u6e901&#8230;&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;Python\u5b66\u4e60\u8d44\u6e902&#8230;&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;Python\u5b66\u4e60\u8d44\u6e903&#8230;&#034;<\/span><span class=\"token punctuation\">]<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>from_texts<span class=\"token punctuation\">(<\/span>documents<span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u68c0\u7d22\u76f8\u5173\u6587\u6863<\/span><br \/>\nquery <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u5982\u4f55\u5b66\u4e60Python&#034;<\/span><br \/>\ndocs <span class=\"token operator\">&#061;<\/span> db<span class=\"token punctuation\">.<\/span>similarity_search<span class=\"token punctuation\">(<\/span>query<span class=\"token punctuation\">,<\/span> k<span class=\"token operator\">&#061;<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">for<\/span> doc <span class=\"token keyword\">in<\/span> docs<span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>doc<span class=\"token punctuation\">.<\/span>page_content<span class=\"token punctuation\">)<\/span><\/p>\n<h5>2.2.2 \u751f\u6210\u5668\u6a21\u5757<\/h5>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;\u751f\u6210\u5668\u7684\u4f5c\u7528\u662f\u5c06\u68c0\u7d22\u5230\u7684\u4fe1\u606f\u8f6c\u5316\u4e3a\u81ea\u7136\u6d41\u7545\u7684\u6587\u672c\u3002\u751f\u6210\u5668\u7684\u8f93\u5165\u4e0d\u4ec5\u5305\u62ec\u4f20\u7edf\u7684\u4e0a\u4e0b\u6587\u4fe1\u606f&#xff0c;\u8fd8\u6709\u901a\u8fc7\u68c0\u7d22\u5668\u5f97\u5230\u7684\u76f8\u5173\u6587\u672c\u7247\u6bb5&#xff0c;\u8fd9\u4f7f\u5f97\u751f\u6210\u7684\u56de\u7b54\u66f4\u52a0\u4fe1\u606f\u4e30\u5bcc\u3001\u51c6\u786e\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4f5c\u5bb6\u5728\u5199\u6587\u7ae0\u65f6&#xff0c;\u4f1a\u53c2\u8003\u76f8\u5173\u7684\u8d44\u6599&#xff0c;\u7136\u540e\u57fa\u4e8e\u8fd9\u4e9b\u8d44\u6599\u521b\u4f5c\u51fa\u4e00\u7bc7\u5b8c\u6574\u7684\u6587\u7ae0\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u5728\u5199\u8bba\u6587\u65f6&#xff0c;\u4f1a\u5148\u67e5\u9605\u76f8\u5173\u7684\u6587\u732e\u8d44\u6599&#xff0c;\u7136\u540e\u57fa\u4e8e\u8fd9\u4e9b\u8d44\u6599\u5199\u51fa\u8bba\u6587\u7684\u5185\u5bb9\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>prompts <span class=\"token keyword\">import<\/span> PromptTemplate<br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u521d\u59cb\u5316LLM<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u521b\u5efaPrompt\u6a21\u677f<\/span><br \/>\nprompt <span class=\"token operator\">&#061;<\/span> PromptTemplate<span class=\"token punctuation\">(<\/span><br \/>\n    input_variables<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;context&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;question&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    template<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;\u57fa\u4e8e\u4ee5\u4e0b\u4e0a\u4e0b\u6587\u56de\u7b54\u95ee\u9898&#xff1a;\\\\n{context}\\\\n\\\\n\u95ee\u9898&#xff1a;{question}&#034;<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u68c0\u7d22\u5230\u7684\u4e0a\u4e0b\u6587<\/span><br \/>\ncontext <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;Python\u662f\u4e00\u79cd\u9ad8\u7ea7\u7f16\u7a0b\u8bed\u8a00&#xff0c;\u6613\u4e8e\u5b66\u4e60\u548c\u4f7f\u7528\u3002&#034;<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u63d0\u95ee<\/span><br \/>\nquestion <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;Python\u662f\u4ec0\u4e48&#xff1f;&#034;<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u751f\u6210\u56de\u7b54<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> llm<span class=\"token punctuation\">(<\/span>prompt<span class=\"token punctuation\">.<\/span><span class=\"token builtin\">format<\/span><span class=\"token punctuation\">(<\/span>context<span class=\"token operator\">&#061;<\/span>context<span class=\"token punctuation\">,<\/span> question<span class=\"token operator\">&#061;<\/span>question<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<h3>\u4e09\u3001\u4f7f\u7528 RAG \u7684\u516b\u5927\u4f18\u52bf<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260222094215-699acf7764898.png\" alt=\"RAG \u4f18\u52bf\" \/><\/p>\n<h4>3.1 \u53ef\u6269\u5c55\u6027&#xff1a;\u51cf\u5c11\u6a21\u578b\u5927\u5c0f\u548c\u8bad\u7ec3\u6210\u672c<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;RAG \u65b9\u6cd5\u4f7f\u5f97\u5f00\u53d1\u8005\u4e0d\u5fc5\u4e3a\u6bcf\u4e00\u4e2a\u7279\u5b9a\u7684\u4efb\u52a1\u91cd\u65b0\u8bad\u7ec3\u6574\u4e2a\u5927\u6a21\u578b&#xff0c;\u53ea\u9700\u8981\u5916\u6302\u4e0a\u77e5\u8bc6\u5e93&#xff0c;\u5373\u53ef\u4e3a\u6a21\u578b\u63d0\u4f9b\u989d\u5916\u7684\u4fe1\u606f\u8f93\u5165&#xff0c;\u63d0\u9ad8\u5176\u56de\u7b54\u7684\u51c6\u786e\u6027\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u7ed9\u4e00\u53f0\u666e\u901a\u7684\u7535\u8111\u5916\u63a5\u4e00\u4e2a\u79fb\u52a8\u786c\u76d8&#xff0c;\u589e\u52a0\u4e86\u5b58\u50a8\u5bb9\u91cf&#xff0c;\u800c\u4e0d\u9700\u8981\u66f4\u6362\u6574\u4e2a\u7535\u8111\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u4f01\u4e1a\u53ef\u4ee5\u4f7f\u7528 RAG \u6280\u672f&#xff0c;\u5c06\u5185\u90e8\u77e5\u8bc6\u5e93\u4e0e\u901a\u7528 LLM \u76f8\u7ed3\u5408&#xff0c;\u800c\u4e0d\u9700\u8981\u91cd\u65b0\u8bad\u7ec3\u4e00\u4e2a\u4e13\u6709\u7684\u5927\u6a21\u578b\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> RetrievalQA<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b\u548c\u5411\u91cf\u6570\u636e\u5e93<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token comment\"># \u52a0\u8f7d\u4f01\u4e1a\u5185\u90e8\u77e5\u8bc6\u5e93<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>load_local<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;enterprise_knowledge_base&#034;<\/span><span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u521d\u59cb\u5316LLM<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u521b\u5efa\u68c0\u7d22QA\u94fe<\/span><br \/>\nqa_chain <span class=\"token operator\">&#061;<\/span> RetrievalQA<span class=\"token punctuation\">.<\/span>from_chain_type<span class=\"token punctuation\">(<\/span><br \/>\n    llm<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span><br \/>\n    chain_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;stuff&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    retriever<span class=\"token operator\">&#061;<\/span>db<span class=\"token punctuation\">.<\/span>as_retriever<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u63d0\u95ee<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> qa_chain<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u516c\u53f8\u7684\u8bf7\u5047\u653f\u7b56\u662f\u4ec0\u4e48&#xff1f;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<h4>3.2 \u51c6\u786e\u6027&#xff1a;\u901a\u8fc7\u5f15\u7528\u4fe1\u606f\u6765\u6e90\u589e\u5f3a\u4fe1\u4efb<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;\u901a\u8fc7\u5f15\u7528\u4fe1\u606f\u6765\u6e90&#xff0c;\u7528\u6237\u53ef\u4ee5\u6838\u5b9e\u7b54\u6848\u7684\u51c6\u786e\u6027&#xff0c;\u8fd9\u589e\u5f3a\u4e86\u4eba\u4eec\u5bf9\u6a21\u578b\u8f93\u51fa\u7ed3\u679c\u7684\u4fe1\u4efb\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u8001\u5e08\u5728\u6279\u6539\u4f5c\u4e1a\u65f6&#xff0c;\u5982\u679c\u5b66\u751f\u5f15\u7528\u4e86\u8bfe\u672c\u4e0a\u7684\u5185\u5bb9&#xff0c;\u8001\u5e08\u4f1a\u66f4\u52a0\u76f8\u4fe1\u7b54\u6848\u7684\u6b63\u786e\u6027\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u5728\u7f51\u4e0a\u770b\u5230\u4e00\u7bc7\u6587\u7ae0&#xff0c;\u5982\u679c\u4f5c\u8005\u5f15\u7528\u4e86\u6743\u5a01\u7684\u7814\u7a76\u62a5\u544a&#xff0c;\u4f60\u4f1a\u66f4\u52a0\u76f8\u4fe1\u6587\u7ae0\u5185\u5bb9\u7684\u771f\u5b9e\u6027\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>prompts <span class=\"token keyword\">import<\/span> PromptTemplate<br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u521d\u59cb\u5316LLM<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u521b\u5efaPrompt\u6a21\u677f<\/span><br \/>\nprompt <span class=\"token operator\">&#061;<\/span> PromptTemplate<span class=\"token punctuation\">(<\/span><br \/>\n    input_variables<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;context&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;question&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    template<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;\u57fa\u4e8e\u4ee5\u4e0b\u4e0a\u4e0b\u6587\u56de\u7b54\u95ee\u9898&#xff0c;\u5e76\u5f15\u7528\u4fe1\u606f\u6765\u6e90&#xff1a;\\\\n{context}\\\\n\\\\n\u95ee\u9898&#xff1a;{question}&#034;<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u68c0\u7d22\u5230\u7684\u4e0a\u4e0b\u6587<\/span><br \/>\ncontext <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u6839\u636e\u300aPython\u7f16\u7a0b\u4ece\u5165\u95e8\u5230\u7cbe\u901a\u300b\u4e00\u4e66&#xff0c;Python\u662f\u4e00\u79cd\u9ad8\u7ea7\u7f16\u7a0b\u8bed\u8a00&#xff0c;\u6613\u4e8e\u5b66\u4e60\u548c\u4f7f\u7528\u3002&#034;<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u63d0\u95ee<\/span><br \/>\nquestion <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;Python\u662f\u4ec0\u4e48&#xff1f;&#034;<\/span><br \/>\n\u200b<br \/>\n<span class=\"token comment\"># \u751f\u6210\u56de\u7b54<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> llm<span class=\"token punctuation\">(<\/span>prompt<span class=\"token punctuation\">.<\/span><span class=\"token builtin\">format<\/span><span class=\"token punctuation\">(<\/span>context<span class=\"token operator\">&#061;<\/span>context<span class=\"token punctuation\">,<\/span> question<span class=\"token operator\">&#061;<\/span>question<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<h4>3.3 \u53ef\u63a7\u6027&#xff1a;\u5141\u8bb8\u66f4\u65b0\u6216\u5b9a\u5236\u77e5\u8bc6<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;RAG \u6280\u672f\u5141\u8bb8\u5f00\u53d1\u8005\u8f7b\u677e\u66f4\u65b0\u6216\u5b9a\u5236\u77e5\u8bc6\u5e93&#xff0c;\u800c\u4e0d\u9700\u8981\u91cd\u65b0\u8bad\u7ec3\u5927\u6a21\u578b\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4f60\u53ef\u4ee5\u968f\u65f6\u66f4\u65b0\u624b\u673a\u4e0a\u7684 APP&#xff0c;\u800c\u4e0d\u9700\u8981\u66f4\u6362\u6574\u4e2a\u624b\u673a\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u4f01\u4e1a\u53ef\u4ee5\u5b9a\u671f\u66f4\u65b0\u5185\u90e8\u77e5\u8bc6\u5e93&#xff0c;\u4f7f\u5f97 LLM \u80fd\u591f\u56de\u7b54\u6700\u65b0\u7684\u653f\u7b56\u548c\u4e1a\u52a1\u95ee\u9898\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u5411\u91cf\u6570\u636e\u5e93<\/span><br \/>\ndocuments <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;\u516c\u53f8\u7684\u8bf7\u5047\u653f\u7b56\u662f&#xff1a;\u75c5\u5047\u9700\u8981\u63d0\u4f9b\u533b\u9662\u8bc1\u660e&#8230;&#034;<\/span><span class=\"token punctuation\">]<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>from_texts<span class=\"token punctuation\">(<\/span>documents<span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u66f4\u65b0\u77e5\u8bc6\u5e93<\/span><br \/>\nnew_document <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u516c\u53f8\u7684\u8bf7\u5047\u653f\u7b56\u5df2\u66f4\u65b0&#xff1a;\u75c5\u5047\u9700\u8981\u63d0\u4f9b\u4e09\u7532\u533b\u9662\u8bc1\u660e&#8230;&#034;<\/span><br \/>\ndb<span class=\"token punctuation\">.<\/span>add_texts<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span>new_document<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u68c0\u7d22\u76f8\u5173\u6587\u6863<\/span><br \/>\nquery <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u516c\u53f8\u7684\u8bf7\u5047\u653f\u7b56\u662f\u4ec0\u4e48&#xff1f;&#034;<\/span><br \/>\ndocs <span class=\"token operator\">&#061;<\/span> db<span class=\"token punctuation\">.<\/span>similarity_search<span class=\"token punctuation\">(<\/span>query<span class=\"token punctuation\">,<\/span> k<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>docs<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>page_content<span class=\"token punctuation\">)<\/span><\/p>\n<h4>3.4 \u53ef\u89e3\u91ca\u6027&#xff1a;\u68c0\u7d22\u5230\u7684\u9879\u76ee\u4f5c\u4e3a\u6a21\u578b\u9884\u6d4b\u4e2d\u6765\u6e90\u7684\u53c2\u8003<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;RAG \u7cfb\u7edf\u901a\u8fc7\u5c06\u54cd\u5e94\u751f\u6210\u5206\u89e3\u4e3a\u4e0d\u540c\u7684\u9636\u6bb5\u6765\u63d0\u4f9b\u900f\u660e\u5ea6&#xff0c;\u63d0\u4f9b\u5bf9\u6570\u636e\u68c0\u7d22\u7684\u5339\u914d\u5ea6\u4ee5\u63d0\u9ad8\u5bf9\u8f93\u51fa\u7684\u4fe1\u4efb\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u6cd5\u5b98\u5728\u5224\u51b3\u6848\u4ef6\u65f6&#xff0c;\u4f1a\u5f15\u7528\u76f8\u5173\u7684\u6cd5\u5f8b\u6761\u6587\u4f5c\u4e3a\u5224\u51b3\u7684\u4f9d\u636e\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u5728\u641c\u7d22\u5f15\u64ce\u4e2d\u641c\u7d22\u7ed3\u679c\u65f6&#xff0c;\u641c\u7d22\u5f15\u64ce\u4f1a\u663e\u793a\u6bcf\u4e2a\u7ed3\u679c\u7684\u6765\u6e90\u94fe\u63a5&#xff0c;\u4f60\u53ef\u4ee5\u70b9\u51fb\u94fe\u63a5\u67e5\u770b\u539f\u59cb\u6587\u6863\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> RetrievalQAWithSourcesChain<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b\u548c\u5411\u91cf\u6570\u636e\u5e93<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>from_texts<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;content&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;Python\u662f\u4e00\u79cd\u9ad8\u7ea7\u7f16\u7a0b\u8bed\u8a00&#xff0c;\u6613\u4e8e\u5b66\u4e60\u548c\u4f7f\u7528\u3002&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;metadata&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;source&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;\u300aPython\u7f16\u7a0b\u4ece\u5165\u95e8\u5230\u7cbe\u901a\u300b&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316LLM<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u68c0\u7d22QA\u94fe<\/span><br \/>\nqa_chain <span class=\"token operator\">&#061;<\/span> RetrievalQAWithSourcesChain<span class=\"token punctuation\">.<\/span>from_chain_type<span class=\"token punctuation\">(<\/span><br \/>\n    llm<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span><br \/>\n    chain_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;stuff&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    retriever<span class=\"token operator\">&#061;<\/span>db<span class=\"token punctuation\">.<\/span>as_retriever<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u63d0\u95ee<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> qa_chain<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;question&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;Python\u662f\u4ec0\u4e48&#xff1f;&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;\u56de\u7b54&#xff1a;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>result<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;answer&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;\u6765\u6e90&#xff1a;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>result<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;sources&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h4>3.5 \u591a\u529f\u80fd\u6027&#xff1a;\u9002\u7528\u4e8e\u591a\u79cd\u4efb\u52a1<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;RAG \u53ef\u4ee5\u9488\u5bf9\u591a\u79cd\u4efb\u52a1\u8fdb\u884c\u5fae\u8c03\u548c\u5b9a\u5236&#xff0c;\u5305\u62ec QA\u3001\u6587\u672c\u6458\u8981\u3001\u5bf9\u8bdd\u7cfb\u7edf\u7b49\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4e00\u628a\u591a\u529f\u80fd\u7684\u745e\u58eb\u519b\u5200&#xff0c;\u53ef\u4ee5\u7528\u6765\u5207\u5272\u3001\u5f00\u74f6\u3001\u62e7\u87ba\u4e1d\u7b49\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;RAG \u6280\u672f\u53ef\u4ee5\u5e94\u7528\u4e8e\u667a\u80fd\u5ba2\u670d\u3001\u6587\u6863\u95ee\u7b54\u3001\u77e5\u8bc6\u56fe\u8c31\u7b49\u591a\u4e2a\u9886\u57df\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>chains<span class=\"token punctuation\">.<\/span>summarize <span class=\"token keyword\">import<\/span> load_summarize_chain<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>text_splitter <span class=\"token keyword\">import<\/span> CharacterTextSplitter<\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u52a0\u8f7d\u6587\u6863<\/span><br \/>\n<span class=\"token keyword\">with<\/span> <span class=\"token builtin\">open<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;example.txt&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;r&#034;<\/span><span class=\"token punctuation\">,<\/span> encoding<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;utf-8&#034;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> f<span class=\"token punctuation\">:<\/span><br \/>\n    text <span class=\"token operator\">&#061;<\/span> f<span class=\"token punctuation\">.<\/span>read<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u5206\u5272\u6587\u672c<\/span><br \/>\ntext_splitter <span class=\"token operator\">&#061;<\/span> CharacterTextSplitter<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\ntexts <span class=\"token operator\">&#061;<\/span> text_splitter<span class=\"token punctuation\">.<\/span>split_text<span class=\"token punctuation\">(<\/span>text<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u5411\u91cf\u6570\u636e\u5e93<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>from_texts<span class=\"token punctuation\">(<\/span>texts<span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316LLM<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u6458\u8981\u94fe<\/span><br \/>\nchain <span class=\"token operator\">&#061;<\/span> load_summarize_chain<span class=\"token punctuation\">(<\/span>llm<span class=\"token punctuation\">,<\/span> chain_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;map_reduce&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u68c0\u7d22\u76f8\u5173\u6587\u6863<\/span><br \/>\nquery <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u672c\u6587\u7684\u4e3b\u8981\u5185\u5bb9\u662f\u4ec0\u4e48&#xff1f;&#034;<\/span><br \/>\ndocs <span class=\"token operator\">&#061;<\/span> db<span class=\"token punctuation\">.<\/span>similarity_search<span class=\"token punctuation\">(<\/span>query<span class=\"token punctuation\">,<\/span> k<span class=\"token operator\">&#061;<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u751f\u6210\u6458\u8981<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> chain<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span>documents<span class=\"token operator\">&#061;<\/span>docs<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<h4>3.6 \u53ca\u65f6\u6027&#xff1a;\u8bc6\u522b\u6700\u65b0\u7684\u4fe1\u606f<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;\u4f7f\u7528\u68c0\u7d22\u6280\u672f\u80fd\u8bc6\u522b\u5230\u6700\u65b0\u7684\u4fe1\u606f&#xff0c;\u8fd9\u4f7f RAG \u5728\u4fdd\u6301\u56de\u7b54\u7684\u53ca\u65f6\u6027\u548c\u51c6\u786e\u6027\u65b9\u9762&#xff0c;\u76f8\u8f83\u4e8e\u53ea\u4f9d\u8d56\u8bad\u7ec3\u6570\u636e\u7684\u4f20\u7edf\u8bed\u8a00\u6a21\u578b\u6709\u660e\u663e\u4f18\u52bf\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4f60\u53ef\u4ee5\u968f\u65f6\u901a\u8fc7\u624b\u673a\u83b7\u53d6\u6700\u65b0\u7684\u65b0\u95fb\u8d44\u8baf\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u95ee AI&#xff1a;\u201c2026 \u5e74\u7684\u6625\u8282\u662f\u54ea\u4e00\u5929&#xff1f;\u201d&#xff0c;RAG \u6280\u672f\u53ef\u4ee5\u68c0\u7d22\u6700\u65b0\u7684\u65e5\u5386\u6570\u636e&#xff0c;\u7ed9\u51fa\u6b63\u786e\u7684\u7b54\u6848\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> RetrievalQA<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<br \/>\n<span class=\"token keyword\">import<\/span> requests<\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u52a0\u8f7d\u6700\u65b0\u7684\u65e5\u5386\u6570\u636e<\/span><br \/>\nresponse <span class=\"token operator\">&#061;<\/span> requests<span class=\"token punctuation\">.<\/span>get<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;https:\/\/api.example.com\/calendar\/2026&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\ncalendar_data <span class=\"token operator\">&#061;<\/span> response<span class=\"token punctuation\">.<\/span>json<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u5411\u91cf\u6570\u636e\u5e93<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>from_texts<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token builtin\">str<\/span><span class=\"token punctuation\">(<\/span>calendar_data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316LLM<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u68c0\u7d22QA\u94fe<\/span><br \/>\nqa_chain <span class=\"token operator\">&#061;<\/span> RetrievalQA<span class=\"token punctuation\">.<\/span>from_chain_type<span class=\"token punctuation\">(<\/span><br \/>\n    llm<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span><br \/>\n    chain_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;stuff&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    retriever<span class=\"token operator\">&#061;<\/span>db<span class=\"token punctuation\">.<\/span>as_retriever<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u63d0\u95ee<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> qa_chain<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;2026\u5e74\u7684\u6625\u8282\u662f\u54ea\u4e00\u5929&#xff1f;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<h4>3.7 \u5b9a\u5236\u6027&#xff1a;\u4e3a\u4e0d\u540c\u9886\u57df\u63d0\u4f9b\u4e13\u4e1a\u7684\u77e5\u8bc6\u652f\u6301<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;\u901a\u8fc7\u7d22\u5f15\u4e0e\u7279\u5b9a\u9886\u57df\u76f8\u5173\u7684\u6587\u672c\u8bed\u6599\u5e93&#xff0c;RAG \u80fd\u591f\u4e3a\u4e0d\u540c\u9886\u57df\u63d0\u4f9b\u4e13\u4e1a\u7684\u77e5\u8bc6\u652f\u6301\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4e00\u4e2a\u4e13\u4e1a\u7684\u533b\u751f&#xff0c;\u80fd\u591f\u9488\u5bf9\u4e0d\u540c\u7684\u75be\u75c5\u63d0\u4f9b\u4e13\u4e1a\u7684\u6cbb\u7597\u65b9\u6848\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;RAG \u6280\u672f\u53ef\u4ee5\u5e94\u7528\u4e8e\u533b\u7597\u3001\u6cd5\u5f8b\u3001\u91d1\u878d\u7b49\u591a\u4e2a\u4e13\u4e1a\u9886\u57df&#xff0c;\u4e3a\u7528\u6237\u63d0\u4f9b\u4e13\u4e1a\u7684\u77e5\u8bc6\u652f\u6301\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> RetrievalQA<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u52a0\u8f7d\u533b\u7597\u77e5\u8bc6\u5e93<\/span><br \/>\n<span class=\"token keyword\">with<\/span> <span class=\"token builtin\">open<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;medical_knowledge_base.txt&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;r&#034;<\/span><span class=\"token punctuation\">,<\/span> encoding<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;utf-8&#034;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> f<span class=\"token punctuation\">:<\/span><br \/>\n    medical_data <span class=\"token operator\">&#061;<\/span> f<span class=\"token punctuation\">.<\/span>read<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u5411\u91cf\u6570\u636e\u5e93<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>from_texts<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span>medical_data<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316LLM<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u68c0\u7d22QA\u94fe<\/span><br \/>\nqa_chain <span class=\"token operator\">&#061;<\/span> RetrievalQA<span class=\"token punctuation\">.<\/span>from_chain_type<span class=\"token punctuation\">(<\/span><br \/>\n    llm<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span><br \/>\n    chain_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;stuff&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    retriever<span class=\"token operator\">&#061;<\/span>db<span class=\"token punctuation\">.<\/span>as_retriever<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u63d0\u95ee<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> qa_chain<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5982\u4f55\u6cbb\u7597\u611f\u5192&#xff1f;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<h4>3.8 \u5b89\u5168\u6027&#xff1a;\u66f4\u597d\u5730\u63a7\u5236\u6570\u636e\u4f7f\u7528<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;RAG \u901a\u8fc7\u6570\u636e\u5e93\u4e2d\u8bbe\u7f6e\u7684\u89d2\u8272\u548c\u5b89\u5168\u63a7\u5236&#xff0c;\u5b9e\u73b0\u4e86\u5bf9\u6570\u636e\u4f7f\u7528\u7684\u66f4\u597d\u63a7\u5236\u3002\u76f8\u6bd4\u4e4b\u4e0b&#xff0c;\u7ecf\u8fc7\u5fae\u8c03\u7684\u6a21\u578b\u5728\u7ba1\u7406\u6570\u636e\u8bbf\u95ee\u6743\u9650\u65b9\u9762\u53ef\u80fd\u4e0d\u591f\u660e\u786e\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4e00\u4e2a\u4fdd\u9669\u7bb1&#xff0c;\u53ea\u6709\u62e5\u6709\u94a5\u5319\u7684\u4eba\u624d\u80fd\u6253\u5f00\u5e76\u67e5\u770b\u91cc\u9762\u7684\u5185\u5bb9\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u4f01\u4e1a\u53ef\u4ee5\u4f7f\u7528 RAG \u6280\u672f&#xff0c;\u5c06\u654f\u611f\u6570\u636e\u5b58\u50a8\u5728\u672c\u5730\u6570\u636e\u5e93\u4e2d&#xff0c;\u901a\u8fc7\u89d2\u8272\u548c\u6743\u9650\u63a7\u5236\u6765\u9650\u5236\u5bf9\u6570\u636e\u7684\u8bbf\u95ee\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> RetrievalQA<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u52a0\u8f7d\u654f\u611f\u6570\u636e<\/span><br \/>\n<span class=\"token keyword\">with<\/span> <span class=\"token builtin\">open<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sensitive_data.txt&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;r&#034;<\/span><span class=\"token punctuation\">,<\/span> encoding<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;utf-8&#034;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> f<span class=\"token punctuation\">:<\/span><br \/>\n    sensitive_data <span class=\"token operator\">&#061;<\/span> f<span class=\"token punctuation\">.<\/span>read<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u5411\u91cf\u6570\u636e\u5e93<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>from_texts<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span>sensitive_data<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316LLM<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u68c0\u7d22QA\u94fe<\/span><br \/>\nqa_chain <span class=\"token operator\">&#061;<\/span> RetrievalQA<span class=\"token punctuation\">.<\/span>from_chain_type<span class=\"token punctuation\">(<\/span><br \/>\n    llm<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span><br \/>\n    chain_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;stuff&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    retriever<span class=\"token operator\">&#061;<\/span>db<span class=\"token punctuation\">.<\/span>as_retriever<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u8bbe\u7f6e\u8bbf\u95ee\u6743\u9650<\/span><br \/>\naccess_control <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token string\">&#034;admin&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token boolean\">True<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token string\">&#034;user&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token boolean\">False<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\"># \u68c0\u67e5\u8bbf\u95ee\u6743\u9650<\/span><br \/>\nuser_role <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;admin&#034;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> access_control<span class=\"token punctuation\">[<\/span>user_role<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token comment\"># \u63d0\u95ee<\/span><br \/>\n    result <span class=\"token operator\">&#061;<\/span> qa_chain<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u654f\u611f\u6570\u636e\u662f\u4ec0\u4e48&#xff1f;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">else<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u60a8\u6ca1\u6709\u8bbf\u95ee\u6743\u9650\u3002&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h3>\u56db\u3001RAG \u4e0e SFT \u7684\u5bf9\u6bd4<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260222094215-699acf7775081.png\" alt=\"RAG \u4e0e SFT \u5bf9\u6bd4\" \/><\/p>\n<h4>4.1 \u6570\u636e\u5904\u7406\u65b9\u5f0f<\/h4>\n<table>\n<tr>RAGSFT<\/tr>\n<tbody>\n<tr>\n<td>\u6570\u636e\u7c7b\u578b<\/td>\n<td>\u52a8\u6001\u6570\u636e&#xff0c;RAG \u4e0d\u65ad\u67e5\u8be2\u5916\u90e8\u6e90&#xff0c;\u786e\u4fdd\u4fe1\u606f\u4fdd\u6301\u6700\u65b0&#xff0c;\u800c\u65e0\u9700\u9891\u7e41\u7684\u6a21\u578b\u91cd\u65b0\u8bad\u7ec3\u3002<\/td>\n<td>&#xff08;\u76f8\u5bf9&#xff09;\u9759\u6001\u6570\u636e&#xff0c;\u5e76\u4e14\u5728\u52a8\u6001\u6570\u636e\u573a\u666f\u4e2d\u53ef\u80fd\u5f88\u5feb\u5c31\u4f1a\u8fc7\u65f6&#xff0c;SFT \u4e5f\u4e0d\u80fd\u4fdd\u8bc1\u8bb0\u4f4f\u8fd9\u4e9b\u77e5\u8bc6\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u5916\u90e8\u77e5\u8bc6\u5229\u7528<\/td>\n<td>RAG \u64c5\u957f\u5229\u7528\u5916\u90e8\u8d44\u6e90&#xff0c;\u901a\u8fc7\u5728\u751f\u6210\u54cd\u5e94\u4e4b\u524d\u4ece\u77e5\u8bc6\u6e90\u68c0\u7d22\u76f8\u5173\u4fe1\u606f\u6765\u589e\u5f3a LLM \u80fd\u529b\u3002\u5b83\u975e\u5e38\u9002\u5408\u6587\u6863\u6216\u5176\u4ed6\u7ed3\u6784\u5316\/\u975e\u7ed3\u6784\u5316\u6570\u636e\u5e93\u3002<\/td>\n<td>SFT \u53ef\u4ee5\u5bf9 LLM \u8fdb\u884c\u5fae\u8c03\u4ee5\u5bf9\u9f50\u9884\u8bad\u7ec3\u5b66\u5230\u7684\u5916\u90e8\u77e5\u8bc6&#xff0c;\u4f46\u5bf9\u4e8e\u9891\u7e41\u66f4\u6539\u7684\u6570\u636e\u6e90\u6765\u8bf4\u53ef\u80fd\u4e0d\u592a\u5b9e\u7528\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u6a21\u578b\u5b9a\u5236<\/td>\n<td>RAG \u4e3b\u8981\u5173\u6ce8\u4fe1\u606f\u68c0\u7d22&#xff0c;\u64c5\u957f\u6574\u5408\u5916\u90e8\u77e5\u8bc6&#xff0c;\u4f46\u53ef\u80fd\u65e0\u6cd5\u5b8c\u5168\u5b9a\u5236\u6a21\u578b\u7684\u884c\u4e3a\u6216\u5199\u4f5c\u98ce\u683c\u3002<\/td>\n<td>SFT \u5141\u8bb8\u6839\u636e\u7279\u5b9a\u7684\u8bed\u6c14\u6216\u672f\u8bed\u8c03\u6574 LLM \u7684\u884c\u4e3a\u3001\u5199\u4f5c\u98ce\u683c\u6216\u7279\u5b9a\u9886\u57df\u7684\u77e5\u8bc6\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u51cf\u5c11\u5e7b\u89c9<\/td>\n<td>RAG \u672c\u8d28\u4e0a\u4e0d\u592a\u5bb9\u6613\u4ea7\u751f\u5e7b\u89c9&#xff0c;\u56e0\u4e3a\u6bcf\u4e2a\u56de\u7b54\u90fd\u5efa\u7acb\u5728\u68c0\u7d22\u5230\u7684\u8bc1\u636e\u4e0a\u3002<\/td>\n<td>SFT \u53ef\u4ee5\u901a\u8fc7\u5c06\u6a21\u578b\u57fa\u4e8e\u7279\u5b9a\u9886\u57df\u7684\u8bad\u7ec3\u6570\u636e\u6765\u5e2e\u52a9\u51cf\u5c11\u5e7b\u89c9&#xff0c;\u4f46\u5f53\u9762\u5bf9\u4e0d\u719f\u6089\u7684\u8f93\u5165\u65f6&#xff0c;\u5b83\u4ecd\u7136\u53ef\u80fd\u4ea7\u751f\u5e7b\u89c9\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u900f\u660e\u5ea6<\/td>\n<td>RAG \u7cfb\u7edf\u901a\u8fc7\u5c06\u54cd\u5e94\u751f\u6210\u5206\u89e3\u4e3a\u4e0d\u540c\u7684\u9636\u6bb5\u6765\u63d0\u4f9b\u900f\u660e\u5ea6&#xff0c;\u63d0\u4f9b\u5bf9\u6570\u636e\u68c0\u7d22\u7684\u5339\u914d\u5ea6\u4ee5\u63d0\u9ad8\u5bf9\u8f93\u51fa\u7684\u4fe1\u4efb\u3002<\/td>\n<td>SFT \u5c31\u50cf\u4e00\u4e2a\u9ed1\u5323\u5b50&#xff0c;\u4f7f\u5f97\u54cd\u5e94\u80cc\u540e\u7684\u63a8\u7406\u66f4\u52a0\u4e0d\u900f\u660e\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u6280\u672f\u8981\u6c42<\/td>\n<td>RAG \u9700\u8981\u9ad8\u6548\u7684\u68c0\u7d22\u7b56\u7565\u548c\u5927\u578b\u6570\u636e\u5e93\u76f8\u5173\u6280\u672f&#xff0c;\u53e6\u5916\u8fd8\u9700\u8981\u4fdd\u6301\u5916\u90e8\u6570\u636e\u6e90\u96c6\u6210\u4ee5\u53ca\u6570\u636e\u66f4\u65b0\u3002<\/td>\n<td>SFT \u9700\u8981\u51c6\u5907\u548c\u6574\u7406\u9ad8\u8d28\u91cf\u7684\u8bad\u7ec3\u6570\u636e\u96c6&#xff0c;\u5b9a\u4e49\u5fae\u8c03\u76ee\u6807\u4ee5\u53ca\u76f8\u5e94\u7684\u8ba1\u7b97\u8d44\u6e90\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;RAG \u548c SFT \u662f\u4e24\u79cd\u4e0d\u540c\u7684\u5927\u6a21\u578b\u589e\u5f3a\u6280\u672f&#xff0c;\u5b83\u4eec\u5728\u6570\u636e\u5904\u7406\u65b9\u5f0f\u3001\u5916\u90e8\u77e5\u8bc6\u5229\u7528\u3001\u6a21\u578b\u5b9a\u5236\u7b49\u65b9\u9762\u5b58\u5728\u660e\u663e\u7684\u5dee\u5f02\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;RAG \u5c31\u50cf\u4e00\u4e2a\u4f1a\u67e5\u8d44\u6599\u7684\u52a9\u624b&#xff0c;\u80fd\u591f\u6839\u636e\u95ee\u9898\u5feb\u901f\u627e\u5230\u76f8\u5173\u7684\u4fe1\u606f\u5e76\u7ed9\u51fa\u51c6\u786e\u7684\u56de\u7b54&#xff1b;\u800c SFT \u5c31\u50cf\u4e00\u4e2a\u7ecf\u8fc7\u7279\u6b8a\u8bad\u7ec3\u7684\u4e13\u5bb6&#xff0c;\u80fd\u591f\u6839\u636e\u7279\u5b9a\u7684\u9886\u57df\u77e5\u8bc6\u63d0\u4f9b\u4e13\u4e1a\u7684\u56de\u7b54\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u9700\u8981\u56de\u7b54\u4e00\u4e2a\u5173\u4e8e\u6700\u65b0\u79d1\u6280\u8fdb\u5c55\u7684\u95ee\u9898\u65f6&#xff0c;RAG \u6280\u672f\u4f1a\u68c0\u7d22\u6700\u65b0\u7684\u79d1\u6280\u65b0\u95fb\u548c\u7814\u7a76\u62a5\u544a&#xff0c;\u7ed9\u51fa\u51c6\u786e\u7684\u56de\u7b54&#xff1b;\u800c SFT \u6280\u672f\u53ef\u80fd\u65e0\u6cd5\u53ca\u65f6\u66f4\u65b0\u77e5\u8bc6&#xff0c;\u7ed9\u51fa\u7684\u56de\u7b54\u53ef\u80fd\u5df2\u7ecf\u8fc7\u65f6\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> RetrievalQA<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<br \/>\n<span class=\"token keyword\">from<\/span> transformers <span class=\"token keyword\">import<\/span> pipeline<\/p>\n<p><span class=\"token comment\"># RAG\u793a\u4f8b<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>from_texts<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;\u6700\u65b0\u79d1\u6280\u8fdb\u5c55&#xff1a;GPT-5\u53d1\u5e03&#8230;&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\nqa_chain <span class=\"token operator\">&#061;<\/span> RetrievalQA<span class=\"token punctuation\">.<\/span>from_chain_type<span class=\"token punctuation\">(<\/span><br \/>\n    llm<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span><br \/>\n    chain_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;stuff&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    retriever<span class=\"token operator\">&#061;<\/span>db<span class=\"token punctuation\">.<\/span>as_retriever<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><br \/>\nrag_result <span class=\"token operator\">&#061;<\/span> qa_chain<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6700\u65b0\u7684\u79d1\u6280\u8fdb\u5c55\u662f\u4ec0\u4e48&#xff1f;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;RAG\u56de\u7b54&#xff1a;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>rag_result<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># SFT\u793a\u4f8b<\/span><br \/>\nsft_model <span class=\"token operator\">&#061;<\/span> pipeline<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;text-generation&#039;<\/span><span class=\"token punctuation\">,<\/span> model<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#039;fine_tuned_model&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\nsft_result <span class=\"token operator\">&#061;<\/span> sft_model<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6700\u65b0\u7684\u79d1\u6280\u8fdb\u5c55\u662f\u4ec0\u4e48&#xff1f;&#034;<\/span><span class=\"token punctuation\">,<\/span> max_length<span class=\"token operator\">&#061;<\/span><span class=\"token number\">100<\/span><span class=\"token punctuation\">,<\/span> num_return_sequences<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;SFT\u56de\u7b54&#xff1a;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>sft_result<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;generated_text&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h3>\u4e94\u3001RAG \u7684\u5178\u578b\u5b9e\u73b0\u65b9\u6cd5<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260222094215-699acf77928ef.png\" alt=\"RAG \u5b9e\u73b0\u65b9\u6cd5\" \/><\/p>\n<h4>5.1 \u6570\u636e\u7d22\u5f15<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;\u6570\u636e\u7d22\u5f15\u662f\u4e00\u4e2a\u79bb\u7ebf\u7684\u8fc7\u7a0b&#xff0c;\u4e3b\u8981\u662f\u5c06\u79c1\u57df\u6570\u636e\u5411\u91cf\u5316\u540e\u6784\u5efa\u7d22\u5f15\u5e76\u5b58\u5165\u6570\u636e\u5e93\u7684\u8fc7\u7a0b\u3002\u4e3b\u8981\u5305\u62ec&#xff1a;\u6570\u636e\u63d0\u53d6\u3001\u6587\u672c\u5206\u5272\u3001\u5411\u91cf\u5316&#xff08;embedding&#xff09;\u53ca\u521b\u5efa\u7d22\u5f15\u7b49\u73af\u8282\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u56fe\u4e66\u9986\u7684\u56fe\u4e66\u7ba1\u7406\u5458&#xff0c;\u4f1a\u5c06\u56fe\u4e66\u5206\u7c7b\u5e76\u5efa\u7acb\u7d22\u5f15&#xff0c;\u4ee5\u4fbf\u8bfb\u8005\u80fd\u591f\u5feb\u901f\u627e\u5230\u9700\u8981\u7684\u56fe\u4e66\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u5728\u56fe\u4e66\u9986\u501f\u4e66\u65f6&#xff0c;\u7ba1\u7406\u5458\u4f1a\u6839\u636e\u4e66\u540d\u3001\u4f5c\u8005\u7b49\u4fe1\u606f&#xff0c;\u4ece\u7d22\u5f15\u4e2d\u627e\u5230\u5bf9\u5e94\u7684\u56fe\u4e66\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>text_splitter <span class=\"token keyword\">import<\/span> CharacterTextSplitter<br \/>\n<span class=\"token keyword\">import<\/span> PyPDF2<\/p>\n<p><span class=\"token comment\"># \u63d0\u53d6PDF\u6587\u672c<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">extract_text_from_pdf<\/span><span class=\"token punctuation\">(<\/span>pdf_path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;&#034;<\/span><br \/>\n    <span class=\"token keyword\">with<\/span> <span class=\"token builtin\">open<\/span><span class=\"token punctuation\">(<\/span>pdf_path<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;rb&#034;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> f<span class=\"token punctuation\">:<\/span><br \/>\n        reader <span class=\"token operator\">&#061;<\/span> PyPDF2<span class=\"token punctuation\">.<\/span>PdfReader<span class=\"token punctuation\">(<\/span>f<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> page <span class=\"token keyword\">in<\/span> reader<span class=\"token punctuation\">.<\/span>pages<span class=\"token punctuation\">:<\/span><br \/>\n            text <span class=\"token operator\">&#043;&#061;<\/span> page<span class=\"token punctuation\">.<\/span>extract_text<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> text<\/p>\n<p><span class=\"token comment\"># \u5206\u5272\u6587\u672c<\/span><br \/>\ntext_splitter <span class=\"token operator\">&#061;<\/span> CharacterTextSplitter<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u5411\u91cf\u5316<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u7d22\u5f15<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">create_index<\/span><span class=\"token punctuation\">(<\/span>pdf_path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    text <span class=\"token operator\">&#061;<\/span> extract_text_from_pdf<span class=\"token punctuation\">(<\/span>pdf_path<span class=\"token punctuation\">)<\/span><br \/>\n    texts <span class=\"token operator\">&#061;<\/span> text_splitter<span class=\"token punctuation\">.<\/span>split_text<span class=\"token punctuation\">(<\/span>text<span class=\"token punctuation\">)<\/span><br \/>\n    db <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>from_texts<span class=\"token punctuation\">(<\/span>texts<span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><br \/>\n    db<span class=\"token punctuation\">.<\/span>save_local<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;pdf_index&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efaPDF\u7d22\u5f15<\/span><br \/>\ncreate_index<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;example.pdf&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h4>5.2 \u6570\u636e\u68c0\u7d22<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;\u6570\u636e\u68c0\u7d22\u662f\u83b7\u53d6\u6709\u6548\u4fe1\u606f\u7684\u5173\u952e\u73af\u8282&#xff0c;\u4e3b\u8981\u5305\u62ec\u5143\u6570\u636e\u8fc7\u6ee4\u3001\u56fe\u5173\u7cfb\u68c0\u7d22\u3001\u5411\u91cf\u5316\u76f8\u4f3c\u5ea6\u68c0\u7d22\u3001\u5173\u952e\u8bcd\u68c0\u7d22\u3001\u5168\u6587\u68c0\u7d22\u3001SQL \u68c0\u7d22\u7b49\u65b9\u5f0f\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4f60\u5728\u641c\u7d22\u5f15\u64ce\u4e2d\u8f93\u5165\u5173\u952e\u8bcd&#xff0c;\u641c\u7d22\u5f15\u64ce\u4f1a\u4ece\u6d77\u91cf\u7f51\u9875\u4e2d\u627e\u5230\u6700\u76f8\u5173\u7684\u7ed3\u679c\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u5728\u767e\u5ea6\u641c\u7d22\u4e2d\u8f93\u5165&#034;Python \u5b66\u4e60\u6559\u7a0b&#034;&#xff0c;\u767e\u5ea6\u4f1a\u6839\u636e\u4f60\u7684\u641c\u7d22\u8bcd&#xff0c;\u4ece\u6d77\u91cf\u7f51\u9875\u4e2d\u627e\u5230\u6700\u76f8\u5173\u7684 Python \u5b66\u4e60\u6559\u7a0b\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<\/p>\n<p><span class=\"token comment\"># \u52a0\u8f7d\u7d22\u5f15<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>load_local<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;pdf_index&#034;<\/span><span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u68c0\u7d22<\/span><br \/>\nquery <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;Python\u5b66\u4e60\u6559\u7a0b&#034;<\/span><br \/>\ndocs <span class=\"token operator\">&#061;<\/span> db<span class=\"token punctuation\">.<\/span>similarity_search<span class=\"token punctuation\">(<\/span>query<span class=\"token punctuation\">,<\/span> k<span class=\"token operator\">&#061;<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">for<\/span> doc <span class=\"token keyword\">in<\/span> docs<span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>doc<span class=\"token punctuation\">.<\/span>page_content<span class=\"token punctuation\">)<\/span><\/p>\n<h4>5.3 \u6587\u672c\u751f\u6210<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;\u6587\u672c\u751f\u6210\u5c31\u662f\u5c06\u539f\u59cb query \u548c\u68c0\u7d22\u5f97\u5230\u7684\u6587\u672c\u7ec4\u5408\u8d77\u6765\u8f93\u5165\u6a21\u578b\u5f97\u5230\u7ed3\u679c\u7684\u8fc7\u7a0b&#xff0c;\u672c\u8d28\u4e0a\u5c31\u662f\u4e2a prompt engineering \u8fc7\u7a0b\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4f60\u5728\u5199\u4f5c\u6587\u65f6&#xff0c;\u4f1a\u5148\u6536\u96c6\u76f8\u5173\u7684\u8d44\u6599&#xff0c;\u7136\u540e\u57fa\u4e8e\u8fd9\u4e9b\u8d44\u6599\u5199\u51fa\u4e00\u7bc7\u5b8c\u6574\u7684\u4f5c\u6587\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u5728\u5199\u6bd5\u4e1a\u8bba\u6587\u65f6&#xff0c;\u4f1a\u5148\u67e5\u9605\u76f8\u5173\u7684\u6587\u732e\u8d44\u6599&#xff0c;\u7136\u540e\u57fa\u4e8e\u8fd9\u4e9b\u8d44\u6599\u5199\u51fa\u8bba\u6587\u7684\u5185\u5bb9\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> RetrievalQA<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<\/p>\n<p><span class=\"token comment\"># \u52a0\u8f7d\u7d22\u5f15<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>load_local<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;pdf_index&#034;<\/span><span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316LLM<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u68c0\u7d22QA\u94fe<\/span><br \/>\nqa_chain <span class=\"token operator\">&#061;<\/span> RetrievalQA<span class=\"token punctuation\">.<\/span>from_chain_type<span class=\"token punctuation\">(<\/span><br \/>\n    llm<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span><br \/>\n    chain_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;stuff&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    retriever<span class=\"token operator\">&#061;<\/span>db<span class=\"token punctuation\">.<\/span>as_retriever<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u63d0\u95ee<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> qa_chain<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5982\u4f55\u5b66\u4e60Python&#xff1f;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<h3>\u516d\u3001RAG \u7684\u5178\u578b\u6848\u4f8b<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260222094215-699acf77b3fcc.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h4>6.1 ChatPDF \u53ca\u5176\u590d\u523b\u7248<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;ChatPDF \u662f\u4e00\u4e2a\u57fa\u4e8e RAG \u6280\u672f\u7684\u5728\u7ebf\u5de5\u5177&#xff0c;\u5b83\u5141\u8bb8\u7528\u6237\u4e0a\u4f20 PDF \u6587\u4ef6\u5e76\u901a\u8fc7\u804a\u5929\u754c\u9762\u63d0\u95ee\u3002ChatPDF \u4f1a\u5148\u5c06 PDF \u6587\u4ef6\u8f6c\u6362\u4e3a\u53ef\u5904\u7406\u7684\u6587\u672c\u683c\u5f0f&#xff0c;\u7136\u540e\u4f7f\u7528 OpenAI \u7684 Embeddings API \u5c06\u6bcf\u4e2a\u5206\u6bb5\u8f6c\u6362\u4e3a\u5411\u91cf&#xff0c;\u6700\u540e\u57fa\u4e8e\u8fd9\u4e9b\u5411\u91cf\u56de\u7b54\u7528\u6237\u7684\u95ee\u9898\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4f60\u53ef\u4ee5\u548c\u4e00\u672c PDF \u6587\u4ef6\u8fdb\u884c\u804a\u5929&#xff0c;\u8be2\u95ee\u5b83\u91cc\u9762\u7684\u5185\u5bb9&#xff0c;\u800c\u4e0d\u9700\u8981\u624b\u52a8\u7ffb\u9605\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u6709\u4e00\u672c\u539a\u539a\u7684\u6280\u672f\u6587\u6863&#xff0c;\u4f60\u53ef\u4ee5\u4f7f\u7528 ChatPDF \u4e0a\u4f20\u8be5\u6587\u6863&#xff0c;\u7136\u540e\u901a\u8fc7\u804a\u5929\u754c\u9762\u8be2\u95ee\u6587\u6863\u4e2d\u7684\u5185\u5bb9&#xff0c;\u800c\u4e0d\u9700\u8981\u624b\u52a8\u7ffb\u9605\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">import<\/span> requests<br \/>\n<span class=\"token keyword\">import<\/span> PyPDF2<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> RetrievalQA<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<\/p>\n<p><span class=\"token comment\"># \u63d0\u53d6PDF\u6587\u672c<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">extract_text_from_pdf<\/span><span class=\"token punctuation\">(<\/span>pdf_path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;&#034;<\/span><br \/>\n    <span class=\"token keyword\">with<\/span> <span class=\"token builtin\">open<\/span><span class=\"token punctuation\">(<\/span>pdf_path<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;rb&#034;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> f<span class=\"token punctuation\">:<\/span><br \/>\n        reader <span class=\"token operator\">&#061;<\/span> PyPDF2<span class=\"token punctuation\">.<\/span>PdfReader<span class=\"token punctuation\">(<\/span>f<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> page <span class=\"token keyword\">in<\/span> reader<span class=\"token punctuation\">.<\/span>pages<span class=\"token punctuation\">:<\/span><br \/>\n            text <span class=\"token operator\">&#043;&#061;<\/span> page<span class=\"token punctuation\">.<\/span>extract_text<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> text<\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u7d22\u5f15<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">create_chat_pdf<\/span><span class=\"token punctuation\">(<\/span>pdf_path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    text <span class=\"token operator\">&#061;<\/span> extract_text_from_pdf<span class=\"token punctuation\">(<\/span>pdf_path<span class=\"token punctuation\">)<\/span><br \/>\n    embeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    db <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>from_texts<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span>text<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><br \/>\n    db<span class=\"token punctuation\">.<\/span>save_local<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;chat_pdf_index&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u63d0\u95ee<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">chat_with_pdf<\/span><span class=\"token punctuation\">(<\/span>question<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    embeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    db <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>load_local<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;chat_pdf_index&#034;<\/span><span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><br \/>\n    llm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    qa_chain <span class=\"token operator\">&#061;<\/span> RetrievalQA<span class=\"token punctuation\">.<\/span>from_chain_type<span class=\"token punctuation\">(<\/span><br \/>\n        llm<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span><br \/>\n        chain_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;stuff&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        retriever<span class=\"token operator\">&#061;<\/span>db<span class=\"token punctuation\">.<\/span>as_retriever<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><br \/>\n    result <span class=\"token operator\">&#061;<\/span> qa_chain<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span>question<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> result<\/p>\n<p><span class=\"token comment\"># \u521b\u5efaChatPDF\u7d22\u5f15<\/span><br \/>\ncreate_chat_pdf<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;example.pdf&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u63d0\u95ee<\/span><br \/>\nanswer <span class=\"token operator\">&#061;<\/span> chat_with_pdf<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u672c\u6587\u7684\u4e3b\u8981\u5185\u5bb9\u662f\u4ec0\u4e48&#xff1f;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>answer<span class=\"token punctuation\">)<\/span><\/p>\n<h4>6.2 Baichuan<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;Baichuan \u662f\u4e00\u4e2a\u57fa\u4e8e RAG \u6280\u672f\u7684\u5927\u6a21\u578b\u641c\u7d22\u589e\u5f3a\u7cfb\u7edf&#xff0c;\u5b83\u878d\u5408\u4e86\u6307\u4ee4\u610f\u56fe\u7406\u89e3\u3001\u667a\u80fd\u641c\u7d22\u548c\u7ed3\u679c\u589e\u5f3a\u7b49\u591a\u4e2a\u6a21\u5757&#xff0c;\u901a\u8fc7\u8fd9\u4e9b\u6a21\u5757\u7684\u534f\u540c\u4f5c\u7528&#xff0c;\u5b9e\u73b0\u4e86\u66f4\u7cbe\u786e\u3001\u667a\u80fd\u7684\u6a21\u578b\u7ed3\u679c\u56de\u7b54&#xff0c;\u51cf\u5c11\u4e86\u6a21\u578b\u7684\u5e7b\u89c9\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4e00\u4e2a\u667a\u80fd\u641c\u7d22\u5f15\u64ce&#xff0c;\u80fd\u591f\u7406\u89e3\u4f60\u7684\u641c\u7d22\u610f\u56fe&#xff0c;\u5e76\u63d0\u4f9b\u66f4\u51c6\u786e\u7684\u641c\u7d22\u7ed3\u679c\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u5728 Baichuan \u4e2d\u641c\u7d22&#034;\u5982\u4f55\u505a\u7ea2\u70e7\u8089&#034;&#xff0c;Baichuan \u4f1a\u5148\u7406\u89e3\u4f60\u7684\u641c\u7d22\u610f\u56fe&#xff0c;\u7136\u540e\u8fdb\u884c\u667a\u80fd\u641c\u7d22&#xff0c;\u6700\u540e\u7ed3\u5408\u5927\u6a21\u578b\u6280\u672f\u4f18\u5316\u641c\u7d22\u7ed3\u679c&#xff0c;\u63d0\u4f9b\u66f4\u51c6\u786e\u7684\u7ea2\u70e7\u8089\u505a\u6cd5\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> RetrievalQA<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>prompts <span class=\"token keyword\">import<\/span> PromptTemplate<\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b\u548c\u5411\u91cf\u6570\u636e\u5e93<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>from_texts<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;\u7ea2\u70e7\u8089\u7684\u505a\u6cd5&#xff1a;1. \u51c6\u5907\u98df\u6750&#8230;&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316LLM<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efaPrompt\u6a21\u677f<\/span><br \/>\nprompt <span class=\"token operator\">&#061;<\/span> PromptTemplate<span class=\"token punctuation\">(<\/span><br \/>\n    input_variables<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;context&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;question&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    template<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;\u7406\u89e3\u7528\u6237\u610f\u56fe&#xff1a;{question}\\\\n\u57fa\u4e8e\u4ee5\u4e0b\u4e0a\u4e0b\u6587\u56de\u7b54\u95ee\u9898&#xff1a;{context}\\\\n\\\\n\u95ee\u9898&#xff1a;{question}&#034;<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u68c0\u7d22QA\u94fe<\/span><br \/>\nqa_chain <span class=\"token operator\">&#061;<\/span> RetrievalQA<span class=\"token punctuation\">.<\/span>from_chain_type<span class=\"token punctuation\">(<\/span><br \/>\n    llm<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span><br \/>\n    chain_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;stuff&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    retriever<span class=\"token operator\">&#061;<\/span>db<span class=\"token punctuation\">.<\/span>as_retriever<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    chain_type_kwargs<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;prompt&#034;<\/span><span class=\"token punctuation\">:<\/span> prompt<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u63d0\u95ee<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> qa_chain<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5982\u4f55\u505a\u7ea2\u70e7\u8089&#xff1f;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<h4>6.3 Multi-modal retrieval-based LMs<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;RA-CM3 \u662f\u4e00\u4e2a\u68c0\u7d22\u589e\u5f3a\u7684\u591a\u6a21\u6001\u6a21\u578b&#xff0c;\u5b83\u5305\u542b\u4e86\u4e00\u4e2a\u4fe1\u606f\u68c0\u7d22\u6846\u67b6\u6765\u4ece\u5916\u90e8\u5b58\u50a8\u5e93\u4e2d\u83b7\u53d6\u77e5\u8bc6\u3002\u4f5c\u8005\u9996\u5148\u4f7f\u7528\u9884\u8bad\u7ec3\u7684 CLIP \u6a21\u578b\u6765\u5b9e\u73b0\u4e00\u4e2a\u68c0\u7d22\u5668&#xff0c;\u7136\u540e\u4f7f\u7528 CM3 Transformer \u67b6\u6784\u6765\u6784\u6210\u4e00\u4e2a\u751f\u6210\u5668&#xff0c;\u5176\u4e2d\u68c0\u7d22\u5668\u7528\u6765\u8f85\u52a9\u6a21\u578b\u4ece\u5916\u90e8\u5b58\u50a8\u5e93\u4e2d\u641c\u7d22\u6709\u5173\u4e8e\u5f53\u524d\u63d0\u793a\u6587\u672c\u4e2d\u7684\u7cbe\u786e\u4fe1\u606f&#xff0c;\u7136\u540e\u5c06\u8be5\u4fe1\u606f\u8fde\u540c\u6587\u672c\u9001\u5165\u5230\u751f\u6210\u5668\u4e2d\u8fdb\u884c\u56fe\u50cf\u5408\u6210\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4e00\u4e2a\u80fd\u591f\u540c\u65f6\u5904\u7406\u6587\u672c\u548c\u56fe\u50cf\u7684\u667a\u80fd\u52a9\u624b&#xff0c;\u5b83\u53ef\u4ee5\u6839\u636e\u4f60\u7684\u6587\u672c\u63d0\u793a&#xff0c;\u4ece\u56fe\u50cf\u5e93\u4e2d\u627e\u5230\u76f8\u5173\u7684\u56fe\u50cf&#xff0c;\u5e76\u751f\u6210\u65b0\u7684\u56fe\u50cf\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u544a\u8bc9 RA-CM3&#034;\u751f\u6210\u4e00\u53ea\u732b\u5728\u8349\u5730\u4e0a\u73a9\u800d\u7684\u56fe\u7247&#034;&#xff0c;\u5b83\u4f1a\u5148\u4ece\u56fe\u50cf\u5e93\u4e2d\u627e\u5230\u76f8\u5173\u7684\u732b\u548c\u8349\u5730\u7684\u56fe\u7247&#xff0c;\u7136\u540e\u751f\u6210\u4e00\u5f20\u65b0\u7684\u732b\u5728\u8349\u5730\u4e0a\u73a9\u800d\u7684\u56fe\u7247\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> RetrievalQA<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<br \/>\n<span class=\"token keyword\">from<\/span> PIL <span class=\"token keyword\">import<\/span> Image<br \/>\n<span class=\"token keyword\">import<\/span> requests<br \/>\n<span class=\"token keyword\">from<\/span> io <span class=\"token keyword\">import<\/span> BytesIO<\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b\u548c\u5411\u91cf\u6570\u636e\u5e93<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>from_texts<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;\u732b\u5728\u8349\u5730\u4e0a\u73a9\u800d\u7684\u56fe\u7247&#xff1a;https:\/\/example.com\/cat.jpg&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316LLM<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u68c0\u7d22QA\u94fe<\/span><br \/>\nqa_chain <span class=\"token operator\">&#061;<\/span> RetrievalQA<span class=\"token punctuation\">.<\/span>from_chain_type<span class=\"token punctuation\">(<\/span><br \/>\n    llm<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span><br \/>\n    chain_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;stuff&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    retriever<span class=\"token operator\">&#061;<\/span>db<span class=\"token punctuation\">.<\/span>as_retriever<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u63d0\u95ee<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> qa_chain<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u751f\u6210\u4e00\u53ea\u732b\u5728\u8349\u5730\u4e0a\u73a9\u800d\u7684\u56fe\u7247&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u663e\u793a\u56fe\u7247<\/span><br \/>\nimage_url <span class=\"token operator\">&#061;<\/span> result<span class=\"token punctuation\">.<\/span>split<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;&#xff1a;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">[<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>strip<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\nresponse <span class=\"token operator\">&#061;<\/span> requests<span class=\"token punctuation\">.<\/span>get<span class=\"token punctuation\">(<\/span>image_url<span class=\"token punctuation\">)<\/span><br \/>\nimage <span class=\"token operator\">&#061;<\/span> Image<span class=\"token punctuation\">.<\/span><span class=\"token builtin\">open<\/span><span class=\"token punctuation\">(<\/span>BytesIO<span class=\"token punctuation\">(<\/span>response<span class=\"token punctuation\">.<\/span>content<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\nimage<span class=\"token punctuation\">.<\/span>show<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h3>\u4e03\u3001RAG \u5b58\u5728\u7684\u95ee\u9898<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260222094215-699acf77d8acb.png\" alt=\"RAG \u5b58\u5728\u7684\u95ee\u9898\" \/><\/p>\n<h4>7.1 \u68c0\u7d22\u6548\u679c\u4f9d\u8d56 embedding \u548c\u68c0\u7d22\u7b97\u6cd5<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;RAG \u7684\u68c0\u7d22\u6548\u679c\u4f9d\u8d56\u4e8e embedding \u6a21\u578b\u548c\u68c0\u7d22\u7b97\u6cd5\u7684\u8d28\u91cf&#xff0c;\u5982\u679c embedding \u6a21\u578b\u65e0\u6cd5\u51c6\u786e\u8868\u793a\u6587\u672c\u7684\u8bed\u4e49&#xff0c;\u6216\u8005\u68c0\u7d22\u7b97\u6cd5\u65e0\u6cd5\u627e\u5230\u6700\u76f8\u5173\u7684\u6587\u6863&#xff0c;\u4f1a\u5bfc\u81f4\u68c0\u7d22\u5230\u65e0\u5173\u4fe1\u606f&#xff0c;\u53cd\u800c\u5bf9\u8f93\u51fa\u6709\u8d1f\u9762\u5f71\u54cd\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u5982\u679c\u56fe\u4e66\u9986\u7684\u56fe\u4e66\u5206\u7c7b\u548c\u7d22\u5f15\u505a\u5f97\u4e0d\u597d&#xff0c;\u8bfb\u8005\u53ef\u80fd\u65e0\u6cd5\u627e\u5230\u9700\u8981\u7684\u56fe\u4e66\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5982\u679c\u641c\u7d22\u5f15\u64ce\u7684\u68c0\u7d22\u7b97\u6cd5\u4e0d\u591f\u51c6\u786e&#xff0c;\u4f60\u53ef\u80fd\u4f1a\u641c\u7d22\u5230\u4e0e\u4f60\u60f3\u8981\u7684\u5185\u5bb9\u65e0\u5173\u7684\u7ed3\u679c\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> RetrievalQA<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b\u548c\u5411\u91cf\u6570\u636e\u5e93<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>from_texts<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;\u732b\u662f\u4e00\u79cd\u54fa\u4e73\u52a8\u7269&#8230;&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u72d7\u662f\u4e00\u79cd\u54fa\u4e73\u52a8\u7269&#8230;&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316LLM<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u68c0\u7d22QA\u94fe<\/span><br \/>\nqa_chain <span class=\"token operator\">&#061;<\/span> RetrievalQA<span class=\"token punctuation\">.<\/span>from_chain_type<span class=\"token punctuation\">(<\/span><br \/>\n    llm<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span><br \/>\n    chain_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;stuff&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    retriever<span class=\"token operator\">&#061;<\/span>db<span class=\"token punctuation\">.<\/span>as_retriever<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u63d0\u95ee<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> qa_chain<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5982\u4f55\u8bad\u7ec3\u4e00\u53ea\u72d7&#xff1f;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<h4>7.2 \u5927\u6a21\u578b\u5982\u4f55\u5229\u7528\u68c0\u7d22\u5230\u7684\u4fe1\u606f\u4ecd\u662f\u9ed1\u76d2<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;\u867d\u7136 RAG \u6280\u672f\u80fd\u591f\u68c0\u7d22\u5230\u76f8\u5173\u7684\u4fe1\u606f&#xff0c;\u4f46\u5927\u6a21\u578b\u5982\u4f55\u5229\u7528\u8fd9\u4e9b\u4fe1\u606f\u751f\u6210\u56de\u7b54\u4ecd\u7136\u662f\u4e00\u4e2a\u9ed1\u76d2&#xff0c;\u53ef\u80fd\u4ecd\u5b58\u5728\u4e0d\u51c6\u786e&#xff08;\u751a\u81f3\u751f\u6210\u7684\u6587\u672c\u4e0e\u68c0\u7d22\u4fe1\u606f\u76f8\u51b2\u7a81&#xff09;\u7684\u60c5\u51b5\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4f60\u7ed9\u5b66\u751f\u63d0\u4f9b\u4e86\u76f8\u5173\u7684\u53c2\u8003\u8d44\u6599&#xff0c;\u4f46\u4f60\u4e0d\u77e5\u9053\u5b66\u751f\u662f\u5982\u4f55\u4f7f\u7528\u8fd9\u4e9b\u8d44\u6599\u6765\u56de\u7b54\u95ee\u9898\u7684\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5373\u4f7f AI \u68c0\u7d22\u5230\u4e86\u76f8\u5173\u7684\u4fe1\u606f&#xff0c;\u5b83\u4ecd\u7136\u53ef\u80fd\u751f\u6210\u4e0e\u8fd9\u4e9b\u4fe1\u606f\u76f8\u51b2\u7a81\u7684\u56de\u7b54\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> RetrievalQA<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b\u548c\u5411\u91cf\u6570\u636e\u5e93<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>from_texts<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;\u732b\u662f\u4e00\u79cd\u54fa\u4e73\u52a8\u7269&#8230;&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u72d7\u662f\u4e00\u79cd\u54fa\u4e73\u52a8\u7269&#8230;&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316LLM<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u68c0\u7d22QA\u94fe<\/span><br \/>\nqa_chain <span class=\"token operator\">&#061;<\/span> RetrievalQA<span class=\"token punctuation\">.<\/span>from_chain_type<span class=\"token punctuation\">(<\/span><br \/>\n    llm<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span><br \/>\n    chain_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;stuff&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    retriever<span class=\"token operator\">&#061;<\/span>db<span class=\"token punctuation\">.<\/span>as_retriever<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u63d0\u95ee<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> qa_chain<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u732b\u662f\u4e00\u79cd\u4ec0\u4e48\u52a8\u7269&#xff1f;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<h4>7.3 \u6548\u7387\u95ee\u9898&#xff1a;\u65e0\u5dee\u522b\u68c0\u7d22\u6240\u6709\u4efb\u52a1<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;RAG \u5bf9\u6240\u6709\u4efb\u52a1\u90fd\u65e0\u5dee\u522b\u68c0\u7d22 k \u4e2a\u6587\u672c\u7247\u6bb5&#xff0c;\u6548\u7387\u4e0d\u9ad8&#xff0c;\u540c\u65f6\u4f1a\u5927\u5927\u589e\u52a0\u6a21\u578b\u8f93\u5165\u7684\u957f\u5ea6&#xff0c;\u5bfc\u81f4\u751f\u6210\u901f\u5ea6\u53d8\u6162\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4f60\u65e0\u8bba\u9047\u5230\u4ec0\u4e48\u95ee\u9898&#xff0c;\u90fd\u8981\u53bb\u56fe\u4e66\u9986\u67e5\u9605\u6240\u6709\u76f8\u5173\u7684\u4e66\u7c4d&#xff0c;\u8fd9\u4f1a\u6d6a\u8d39\u5927\u91cf\u7684\u65f6\u95f4\u548c\u7cbe\u529b\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5982\u679c AI \u5bf9\u6bcf\u4e2a\u95ee\u9898\u90fd\u68c0\u7d22\u5927\u91cf\u7684\u6587\u6863&#xff0c;\u4f1a\u5bfc\u81f4\u56de\u7b54\u901f\u5ea6\u53d8\u6162&#xff0c;\u5f71\u54cd\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">import<\/span> time<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>vectorstores <span class=\"token keyword\">import<\/span> FAISS<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>embeddings <span class=\"token keyword\">import<\/span> OpenAIEmbeddings<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>chains <span class=\"token keyword\">import<\/span> RetrievalQA<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>llms <span class=\"token keyword\">import<\/span> OpenAI<\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b\u548c\u5411\u91cf\u6570\u636e\u5e93<\/span><br \/>\nembeddings <span class=\"token operator\">&#061;<\/span> OpenAIEmbeddings<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\ndb <span class=\"token operator\">&#061;<\/span> FAISS<span class=\"token punctuation\">.<\/span>from_texts<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;\u732b\u662f\u4e00\u79cd\u54fa\u4e73\u52a8\u7269&#8230;&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u72d7\u662f\u4e00\u79cd\u54fa\u4e73\u52a8\u7269&#8230;&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u9e1f\u662f\u4e00\u79cd\u810a\u690e\u52a8\u7269&#8230;&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u9c7c\u662f\u4e00\u79cd\u810a\u690e\u52a8\u7269&#8230;&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> embeddings<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521d\u59cb\u5316LLM<\/span><br \/>\nllm <span class=\"token operator\">&#061;<\/span> OpenAI<span class=\"token punctuation\">(<\/span>temperature<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u68c0\u7d22QA\u94fe&#xff08;\u68c0\u7d222\u4e2a\u6587\u6863&#xff09;<\/span><br \/>\nqa_chain_2 <span class=\"token operator\">&#061;<\/span> RetrievalQA<span class=\"token punctuation\">.<\/span>from_chain_type<span class=\"token punctuation\">(<\/span><br \/>\n    llm<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span><br \/>\n    chain_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;stuff&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    retriever<span class=\"token operator\">&#061;<\/span>db<span class=\"token punctuation\">.<\/span>as_retriever<span class=\"token punctuation\">(<\/span>search_kwargs<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;k&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u521b\u5efa\u68c0\u7d22QA\u94fe&#xff08;\u68c0\u7d224\u4e2a\u6587\u6863&#xff09;<\/span><br \/>\nqa_chain_4 <span class=\"token operator\">&#061;<\/span> RetrievalQA<span class=\"token punctuation\">.<\/span>from_chain_type<span class=\"token punctuation\">(<\/span><br \/>\n    llm<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span><br \/>\n    chain_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;stuff&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    retriever<span class=\"token operator\">&#061;<\/span>db<span class=\"token punctuation\">.<\/span>as_retriever<span class=\"token punctuation\">(<\/span>search_kwargs<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;k&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u63d0\u95ee\u5e76\u8ba1\u65f6<\/span><br \/>\nstart_time <span class=\"token operator\">&#061;<\/span> time<span class=\"token punctuation\">.<\/span>time<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\nresult_2 <span class=\"token operator\">&#061;<\/span> qa_chain_2<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u732b\u662f\u4e00\u79cd\u4ec0\u4e48\u52a8\u7269&#xff1f;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\nend_time <span class=\"token operator\">&#061;<\/span> time<span class=\"token punctuation\">.<\/span>time<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;\u68c0\u7d222\u4e2a\u6587\u6863\u8017\u65f6&#xff1a;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>end_time <span class=\"token operator\">&#8211;<\/span> start_time<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">\u79d2&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>start_time <span class=\"token operator\">&#061;<\/span> time<span class=\"token punctuation\">.<\/span>time<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\nresult_4 <span class=\"token operator\">&#061;<\/span> qa_chain_4<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u732b\u662f\u4e00\u79cd\u4ec0\u4e48\u52a8\u7269&#xff1f;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\nend_time <span class=\"token operator\">&#061;<\/span> time<span class=\"token punctuation\">.<\/span>time<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;\u68c0\u7d224\u4e2a\u6587\u6863\u8017\u65f6&#xff1a;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>end_time <span class=\"token operator\">&#8211;<\/span> start_time<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">\u79d2&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h4>7.4 \u65e0\u6cd5\u7cbe\u51c6\u67e5\u8bc1\u4e8b\u5b9e<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;RAG \u65e0\u6cd5\u5f15\u7528\u6765\u6e90&#xff0c;\u4e5f\u56e0\u6b64\u65e0\u6cd5\u7cbe\u51c6\u5730\u67e5\u8bc1\u4e8b\u5b9e&#xff0c;\u68c0\u7d22\u7684\u771f\u5b9e\u6027\u53d6\u51b3\u4e8e\u6570\u636e\u6e90\u53ca\u68c0\u7d22\u7b97\u6cd5\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4f60\u542c\u5230\u4e00\u4e2a\u6d88\u606f&#xff0c;\u4f46\u4e0d\u77e5\u9053\u5b83\u7684\u6765\u6e90&#xff0c;\u65e0\u6cd5\u5224\u65ad\u5b83\u7684\u771f\u5b9e\u6027\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5982\u679c AI \u68c0\u7d22\u5230\u7684\u4fe1\u606f\u6765\u81ea\u4e0d\u53ef\u9760\u7684\u6570\u636e\u6e90&#xff0c;\u5b83\u751f\u6210\u7684\u56de\u7b54\u53ef\u80fd\u662f\u4e0d\u51c6\u786e\u7684\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p>from langchain.vectorstores import FAISS<br \/>\nfrom langchain.embeddings import OpenAIEmbeddings<br \/>\nfrom langchain.chains import RetrievalQA<br \/>\nfrom langchain.llms import OpenAI<\/p>\n<p># \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b\u548c\u5411\u91cf\u6570\u636e\u5e93<br \/>\nembeddings &#061; OpenAIEmbeddings()<br \/>\ndb &#061; FAISS.from_texts([&#034;\u732b\u662f\u4e00\u79cd\u722c\u884c\u52a8\u7269&#8230;&#xff08;\u6765\u6e90&#xff1a;\u4e0d\u53ef\u9760\u7f51\u7ad9&#xff09;&#034;], embeddings)<\/p>\n<p># \u521d\u59cb\u5316LLM<br \/>\nllm &#061; OpenAI(temperature&#061;0)<\/p>\n<p># \u521b\u5efa\u68c0\u7d22QA\u94fe<br \/>\nqa_chain &#061; RetrievalQA.from_chain_type(<br \/>\n    llm&#061;llm,<br \/>\n    chain_type&#061;&#034;stuff&#034;,<br \/>\n    retriever&#061;db.as_retriever()<br \/>\n)<\/p>\n<p># \u63d0\u95ee<br \/>\nresult &#061; qa_chain.run(&#034;\u732b\u662f\u4e00\u79cd\u4ec0\u4e48\u52a8\u7269&#xff1f;&#034;)<br \/>\nprint(result)<\/p>\n<h3>\u516b\u3001RAG \u7684\u62d3\u5c55\u65b9\u6848<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260222094215-699acf77f1e98.png\" alt=\"RAG \u62d3\u5c55\u65b9\u6848\" \/><\/p>\n<h4>8.1 \u591a\u6a21\u6001 RAG<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;\u591a\u6a21\u6001 RAG \u4e0d\u4ec5\u53ef\u4ee5\u5904\u7406\u6587\u672c\u6570\u636e&#xff0c;\u8fd8\u53ef\u4ee5\u5904\u7406\u56fe\u50cf\u3001\u97f3\u9891\u3001\u89c6\u9891\u7b49\u591a\u79cd\u6a21\u6001\u7684\u6570\u636e\u3002\u5b83\u53ef\u4ee5\u5c06\u4e0d\u540c\u6a21\u6001\u7684\u6570\u636e\u8f6c\u5316\u4e3a\u5411\u91cf&#xff0c;\u7136\u540e\u8fdb\u884c\u68c0\u7d22\u548c\u751f\u6210\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4e00\u4e2a\u80fd\u591f\u540c\u65f6\u5904\u7406\u6587\u5b57\u3001\u56fe\u7247\u3001\u58f0\u97f3\u548c\u89c6\u9891\u7684\u667a\u80fd\u52a9\u624b&#xff0c;\u5b83\u53ef\u4ee5\u6839\u636e\u4f60\u7684\u9700\u6c42&#xff0c;\u4ece\u4e0d\u540c\u6a21\u6001\u7684\u6570\u636e\u4e2d\u627e\u5230\u76f8\u5173\u7684\u4fe1\u606f&#xff0c;\u5e76\u751f\u6210\u76f8\u5e94\u7684\u56de\u7b54\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u95ee AI&#034;\u8fd9\u5f20\u56fe\u7247\u4e2d\u7684\u52a8\u7269\u662f\u4ec0\u4e48&#xff1f;&#034;&#xff0c;\u591a\u6a21\u6001 RAG \u4f1a\u5148\u5206\u6790\u56fe\u7247\u4e2d\u7684\u52a8\u7269&#xff0c;\u7136\u540e\u4ece\u77e5\u8bc6\u5e93\u4e2d\u627e\u5230\u76f8\u5173\u7684\u4fe1\u606f&#xff0c;\u7ed9\u51fa\u51c6\u786e\u7684\u56de\u7b54\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p>from langchain.vectorstores import FAISS<br \/>\nfrom langchain.embeddings import OpenAIEmbeddings<br \/>\nfrom langchain.chains import RetrievalQA<br \/>\nfrom langchain.llms import OpenAI<br \/>\nfrom PIL import Image<br \/>\nimport pytesseract<\/p>\n<p># \u63d0\u53d6\u56fe\u7247\u6587\u672c<br \/>\ndef extract_text_from_image(image_path):<br \/>\n    image &#061; Image.open(image_path)<br \/>\n    text &#061; pytesseract.image_to_string(image)<br \/>\n    return text<\/p>\n<p># \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b\u548c\u5411\u91cf\u6570\u636e\u5e93<br \/>\nembeddings &#061; OpenAIEmbeddings()<br \/>\ndb &#061; FAISS.from_texts([&#034;\u732b\u662f\u4e00\u79cd\u54fa\u4e73\u52a8\u7269&#8230;&#034;], embeddings)<\/p>\n<p># \u521d\u59cb\u5316LLM<br \/>\nllm &#061; OpenAI(temperature&#061;0)<\/p>\n<p># \u521b\u5efa\u68c0\u7d22QA\u94fe<br \/>\nqa_chain &#061; RetrievalQA.from_chain_type(<br \/>\n    llm&#061;llm,<br \/>\n    chain_type&#061;&#034;stuff&#034;,<br \/>\n    retriever&#061;db.as_retriever()<br \/>\n)<\/p>\n<p># \u63d0\u53d6\u56fe\u7247\u6587\u672c<br \/>\nimage_text &#061; extract_text_from_image(&#034;cat.jpg&#034;)<\/p>\n<p># \u63d0\u95ee<br \/>\nresult &#061; qa_chain.run(f&#034;\u8fd9\u5f20\u56fe\u7247\u4e2d\u7684\u52a8\u7269\u662f\u4ec0\u4e48&#xff1f;\u56fe\u7247\u6587\u672c&#xff1a;{image_text}&#034;)<br \/>\nprint(result)<\/p>\n<h4>8.2 \u5b9e\u65f6 RAG<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;\u5b9e\u65f6 RAG \u80fd\u591f\u5b9e\u65f6\u68c0\u7d22\u6700\u65b0\u7684\u6570\u636e&#xff0c;\u5e76\u57fa\u4e8e\u8fd9\u4e9b\u6570\u636e\u751f\u6210\u56de\u7b54\u3002\u5b83\u53ef\u4ee5\u4e0e\u5b9e\u65f6\u6570\u636e\u6e90&#xff08;\u5982\u65b0\u95fb API\u3001\u793e\u4ea4\u5a92\u4f53 API \u7b49&#xff09;\u96c6\u6210&#xff0c;\u786e\u4fdd\u56de\u7b54\u7684\u53ca\u65f6\u6027\u548c\u51c6\u786e\u6027\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4e00\u4e2a\u5b9e\u65f6\u66f4\u65b0\u7684\u65b0\u95fb\u64ad\u62a5\u5458&#xff0c;\u80fd\u591f\u968f\u65f6\u83b7\u53d6\u6700\u65b0\u7684\u65b0\u95fb\u4fe1\u606f&#xff0c;\u5e76\u53ca\u65f6\u64ad\u62a5\u7ed9\u89c2\u4f17\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u95ee AI&#034;\u6700\u65b0\u7684\u79d1\u6280\u65b0\u95fb\u662f\u4ec0\u4e48&#xff1f;&#034;&#xff0c;\u5b9e\u65f6 RAG \u4f1a\u5b9e\u65f6\u68c0\u7d22\u6700\u65b0\u7684\u79d1\u6280\u65b0\u95fb&#xff0c;\u5e76\u7ed9\u51fa\u51c6\u786e\u7684\u56de\u7b54\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p>from langchain.vectorstores import FAISS<br \/>\nfrom langchain.embeddings import OpenAIEmbeddings<br \/>\nfrom langchain.chains import RetrievalQA<br \/>\nfrom langchain.llms import OpenAI<br \/>\nimport requests<br \/>\n\u200b<br \/>\n# \u5b9e\u65f6\u83b7\u53d6\u79d1\u6280\u65b0\u95fb<br \/>\ndef get_latest_tech_news():<br \/>\n    response &#061; requests.get(&#034;https:\/\/newsapi.org\/v2\/top-headlines?country&#061;us&amp;category&#061;technology&amp;apiKey&#061;YOUR_API_KEY&#034;)<br \/>\n    news &#061; response.json()<br \/>\n    return news[&#039;articles&#039;][0][&#039;content&#039;]<br \/>\n\u200b<br \/>\n# \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b\u548c\u5411\u91cf\u6570\u636e\u5e93<br \/>\nembeddings &#061; OpenAIEmbeddings()<br \/>\ndb &#061; FAISS.from_texts([get_latest_tech_news()], embeddings)<br \/>\n\u200b<br \/>\n# \u521d\u59cb\u5316LLM<br \/>\nllm &#061; OpenAI(temperature&#061;0)<br \/>\n\u200b<br \/>\n# \u521b\u5efa\u68c0\u7d22QA\u94fe<br \/>\nqa_chain &#061; RetrievalQA.from_chain_type(<br \/>\n    llm&#061;llm,<br \/>\n    chain_type&#061;&#034;stuff&#034;,<br \/>\n    retriever&#061;db.as_retriever()<br \/>\n)<br \/>\n\u200b<br \/>\n# \u63d0\u95ee<br \/>\nresult &#061; qa_chain.run(&#034;\u6700\u65b0\u7684\u79d1\u6280\u65b0\u95fb\u662f\u4ec0\u4e48&#xff1f;&#034;)<br \/>\nprint(result)<\/p>\n<h4>8.3 \u4e2a\u6027\u5316 RAG<\/h4>\n<p>\u4e13\u4e1a\u89e3\u91ca&#xff1a;\u4e2a\u6027\u5316 RAG \u80fd\u591f\u6839\u636e\u7528\u6237\u7684\u4e2a\u6027\u5316\u9700\u6c42\u548c\u504f\u597d&#xff0c;\u63d0\u4f9b\u4e2a\u6027\u5316\u7684\u56de\u7b54\u3002\u5b83\u53ef\u4ee5\u901a\u8fc7\u5206\u6790\u7528\u6237\u7684\u5386\u53f2\u8bb0\u5f55\u3001\u5174\u8da3\u7231\u597d\u7b49\u4fe1\u606f&#xff0c;\u8c03\u6574\u68c0\u7d22\u7b56\u7565\u548c\u751f\u6210\u65b9\u5f0f&#xff0c;\u4ee5\u6ee1\u8db3\u7528\u6237\u7684\u4e2a\u6027\u5316\u9700\u6c42\u3002<\/p>\n<p>\u5927\u767d\u8bdd\u89e3\u8bfb&#xff1a;\u5c31\u50cf\u4e00\u4e2a\u8d34\u5fc3\u7684\u79c1\u4eba\u79d8\u4e66&#xff0c;\u80fd\u591f\u6839\u636e\u4f60\u7684\u5174\u8da3\u7231\u597d&#xff0c;\u4e3a\u4f60\u63d0\u4f9b\u4e2a\u6027\u5316\u7684\u670d\u52a1\u3002<\/p>\n<p>\u751f\u6d3b\u6848\u4f8b&#xff1a;\u5f53\u4f60\u95ee AI&#034;\u63a8\u8350\u4e00\u4e9b\u9002\u5408\u6211\u7684\u7535\u5f71&#034;&#xff0c;\u4e2a\u6027\u5316 RAG \u4f1a\u5206\u6790\u4f60\u7684\u7535\u5f71\u559c\u597d&#xff0c;\u4e3a\u4f60\u63a8\u8350\u7b26\u5408\u4f60\u53e3\u5473\u7684\u7535\u5f71\u3002<\/p>\n<p>\u793a\u4f8b Python \u4ee3\u7801&#xff1a;<\/p>\n<p>from langchain.vectorstores import FAISS<br \/>\nfrom langchain.embeddings import OpenAIEmbeddings<br \/>\nfrom langchain.chains import RetrievalQA<br \/>\nfrom langchain.llms import OpenAI<br \/>\nfrom langchain.prompts import PromptTemplate<br \/>\n\u200b<br \/>\n# \u521d\u59cb\u5316\u5d4c\u5165\u6a21\u578b\u548c\u5411\u91cf\u6570\u636e\u5e93<br \/>\nembeddings &#061; OpenAIEmbeddings()<br \/>\ndb &#061; FAISS.from_texts([&#034;\u300a\u8096\u7533\u514b\u7684\u6551\u8d4e\u300b\u662f\u4e00\u90e8\u7ecf\u5178\u7684\u5267\u60c5\u7247&#8230;&#034;, &#034;\u300a\u963f\u7518\u6b63\u4f20\u300b\u662f\u4e00\u90e8\u52b1\u5fd7\u7684\u5267\u60c5\u7247&#8230;&#034;, &#034;\u300a\u661f\u9645\u7a7f\u8d8a\u300b\u662f\u4e00\u90e8\u79d1\u5e7b\u7247&#8230;&#034;], embeddings)<br \/>\n\u200b<br \/>\n# \u521d\u59cb\u5316LLM<br \/>\nllm &#061; OpenAI(temperature&#061;0)<br \/>\n\u200b<br \/>\n# \u83b7\u53d6\u7528\u6237\u504f\u597d<br \/>\nuser_preference &#061; &#034;\u5267\u60c5\u7247&#034;<br \/>\n\u200b<br \/>\n# \u521b\u5efaPrompt\u6a21\u677f<br \/>\nprompt &#061; PromptTemplate(<br \/>\n    input_variables&#061;[&#034;context&#034;, &#034;question&#034;, &#034;user_preference&#034;],<br \/>\n    template&#061;&#034;\u7528\u6237\u504f\u597d&#xff1a;{user_preference}\\\\n\u57fa\u4e8e\u4ee5\u4e0b\u4e0a\u4e0b\u6587\u56de\u7b54\u95ee\u9898&#xff1a;{context}\\\\n\\\\n\u95ee\u9898&#xff1a;{question}&#034;<br \/>\n)<br \/>\n\u200b<br \/>\n# \u521b\u5efa\u68c0\u7d22QA\u94fe<br \/>\nqa_chain &#061; RetrievalQA.from_chain_type(<br \/>\n    llm&#061;llm,<br \/>\n    chain_type&#061;&#034;stuff&#034;,<br \/>\n    retriever&#061;db.as_retriever(),<br \/>\n    chain_type_kwargs&#061;{&#034;prompt&#034;: prompt}<br \/>\n)<br \/>\n\u200b<br \/>\n# \u63d0\u95ee<br \/>\nresult &#061; qa_chain.run({&#034;question&#034;: &#034;\u63a8\u8350\u4e00\u4e9b\u9002\u5408\u6211\u7684\u7535\u5f71&#034;, &#034;user_preference&#034;: user_preference})<br \/>\nprint(result)<\/p>\n<h3>\u4e5d\u3001\u4e92\u52a8\u4e0e\u4ea4\u6d41<\/h3>\n<h4>9.1 \u8bc4\u8bba\u533a\u4e92\u52a8<\/h4>\n<p>\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u7559\u8a00&#xff0c;\u5206\u4eab\u4f60\u5bf9 RAG \u6280\u672f\u7684\u770b\u6cd5\u548c\u7ecf\u9a8c\u3002\u5982\u679c\u4f60\u6709\u4efb\u4f55\u95ee\u9898\u6216\u5efa\u8bae&#xff0c;\u4e5f\u53ef\u4ee5\u5728\u8bc4\u8bba\u533a\u63d0\u51fa&#xff0c;\u6211\u4f1a\u5c3d\u529b\u4e3a\u4f60\u89e3\u7b54\u3002<\/p>\n<h4>9.2 \u8f6c\u8f7d\u58f0\u660e<\/h4>\n<p>\u672c\u6587\u7cfb Java\u540e\u7aef\u7684Ai\u4e4b\u8def 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