{"id":83730,"date":"2026-07-26T02:39:55","date_gmt":"2026-07-25T18:39:55","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/83730.html"},"modified":"2026-07-26T02:39:55","modified_gmt":"2026-07-25T18:39:55","slug":"64-%e9%ab%98%e7%ba%a7rag-%e6%91%84%e5%8f%96%e7%ae%a1%e9%81%93","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/83730.html","title":{"rendered":"64.\u9ad8\u7ea7RAG-\u6444\u53d6\u7ba1\u9053"},"content":{"rendered":"<p>\u5185\u5bb9\u53c2\u8003\u4e8e&#xff1a;<span style=\"color:red\">\u56fe\u7075AI\u5927\u6a21\u578b\u5168\u6808<\/span><\/p>\n<p>\u6444\u53d6\u7ba1\u9053<\/p>\n<p>\u73b0\u5728\u6709\u8fd9\u6837\u7684\u4e00\u4ef6\u4e8b\u60c5&#xff0c;\u6709\u4e00\u4e2a\u6587\u6863A\u7528\u6237\u4e0a\u4f20\u4e86\u4e00\u6b21&#xff0c;B\u7528\u6237\u4e0a\u4f20\u4e86\u4e00\u6b21&#xff0c;\u4e00\u4e2a\u6587\u6863\u4e0a\u4f20\u4e86\u4e24\u6b21\u8fd9\u79cd\u60c5\u51b5\u8981\u505a\u4e24\u6b21RAG\u7684\u77e5\u8bc6\u5e93\u5417&#xff1f;\u8fd9\u91cc\u5c31\u6709\u4e24\u4e2a\u6982\u5ff5 \u5168\u91cf\u66f4\u65b0\u548c\u589e\u91cf\u66f4\u65b0<\/p>\n<p>\u5168\u91cf\u66f4\u65b0&#xff1a;\u4e0a\u4f20\u4e00\u6b21\u6587\u6863\u5c31\u628a\u4e4b\u524d\u7684\u5168\u5220\u4e86&#xff0c;\u6839\u636e\u8fd9\u6b21\u4e0a\u4f20\u7684\u6587\u6863\u751f\u6210RAG\u77e5\u8bc6\u5e93&#xff0c;\u6709\u5f88\u591a\u6846\u67b6\u90fd\u662f\u8fd9\u6837\u641e\u7684<\/p>\n<p>\u589e\u91cf\u66f4\u65b0&#xff1a;\u4e0a\u4f20\u4e00\u6b21\u6587\u6863&#xff0c;\u5148\u67e5\u770b\u8fd9\u6b21\u4e0a\u4f20\u7684\u6587\u6863\u4e2d\u7684\u5185\u5bb9\u662f\u5426\u5df2\u7ecf\u5728RAG\u77e5\u8bc6\u5e93\u4e2d\u5b58\u5728\u4e86&#xff0c;\u5982\u679c\u5b58\u5728\u4e86\u5c31\u4e0d\u8fdb\u884c\u751f\u6210\u64cd\u4f5c&#xff0c;\u7136\u540e\u6587\u6863\u4e2d\u80af\u5b9a\u5e76\u4e0d\u662f\u6240\u6709\u7684\u5185\u5bb9\u90fd\u5b58\u5728\u4e86&#xff0c;\u90a3\u4e9b\u6ca1\u6709\u5b58\u5728\u7684\u5185\u5bb9\u5c31\u8981\u63d0\u53d6\u51fa\u6765\u8fdb\u884c\u751f\u6210RAG\u77e5\u8bc6\u5e93&#xff0c;\u5b83\u5c31\u6d89\u53ca\u5230\u6444\u53d6\u7ba1\u9053<\/p>\n<p>\u6444\u53d6\u7ba1\u9053&#xff08;IngestionPipeline&#xff09;\u662fLLamaIndex\u4e2d\u7528\u6765\u6444\u53d6\u6587\u6863\u7684\u6838\u5fc3\u7ec4\u4ef6&#xff0c;\u5b83\u628a\u6e90\u6587\u6863\u5230\u53ef\u4ee5\u7528\u4e8e\u68c0\u7d22\u7d22\u5f15\u7684\u8fc7\u7a0b\u8fdb\u884c\u4e86\u6d41\u7a0b\u5316\u3001\u6a21\u5757\u5316\u3001\u590d\u7528\u5316&#xff0c;\u5c31\u662f\u8bf4\u6211\u4eec\u4e4b\u524d\u5199\u4e00\u4e2a\u77e5\u8bc6\u5e93\u7684\u65f6\u5019\u8981\u505a \u52a0\u8f7d\u6587\u6863\u3001\u7ed9\u6587\u6863\u5206\u7247\u3001\u7ed9\u5206\u7247\u7684\u5185\u5bb9\u8fdb\u884c\u5411\u91cf\u5316\u3001\u628a\u5411\u91cf\u5316\u7684\u5185\u5bb9\u653e\u5230\u6570\u636e\u5e93\u4e2d&#xff0c;\u800c\u6444\u53d6\u7ba1\u9053\u628a\u8fd9\u6574\u4e2a\u6d41\u7a0b\u8fdb\u884c\u4e86\u5c01\u88c5&#xff0c;\u7edf\u4e00\u7ba1\u7406\u6444\u53d6\u6d41\u7a0b&#xff0c;\u628a\u6587\u6863\u52a0\u8f7d\u3001\u6587\u672c\u89e3\u6790\u3001\u6587\u672c\u5206\u5757\u3001\u5143\u6570\u636e\u63d0\u53d6\u3001\u5411\u91cf\u5d4c\u5165\u751f\u6210\u3001\u7d22\u5f15\u5b58\u50a8\u7b49\u6b65\u9aa4\u641e\u6210\u4e00\u4e2a\u53ef\u914d\u7f6e\u7684\u7ba1\u9053\u3002<\/p>\n<p>\u8bfb\u8d77\u6765\u53ef\u80fd\u4e0d\u662f\u5f88\u597d\u7406\u89e3&#xff0c;\u76f4\u63a5\u770b\u4ee3\u7801&#xff0c;\u7ed3\u5408\u4ee3\u7801\u53bb\u7406\u89e3<\/p>\n<\/p>\n<p>\u751f\u6210\u7684\u6807\u9898&#xff1a;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"1335\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/07\/20260725183953-6a6502f99d9de.png\" width=\"1656\" \/><\/p>\n<p>\u4ee3\u7801&#xff1a;\u4e0a\u56fe\u7ea2\u6846\u7684\u5185\u5bb9\u5c31\u662f TitleExtractor \u751f\u6210\u7684\u5185\u5bb9<\/p>\n<p>from llama_index.core.node_parser import SentenceSplitter<br \/>\nfrom llama_index.core.ingestion import IngestionPipeline<br \/>\nfrom llama_index.core import SimpleDirectoryReader, VectorStoreIndex<br \/>\nfrom llama_index.core.extractors import (<br \/>\n    TitleExtractor,<br \/>\n)<\/p>\n<p>from base_llm import embed_model, llm<\/p>\n<p># \u5b9a\u4e49\u6570\u636e\u8fde\u63a5\u5668\u53bb\u8bfb\u53d6\u6570\u636e<br \/>\ndocuments &#061; SimpleDirectoryReader(input_files&#061;[&#034;.\/data_file\/\u5c0f\u8bf4.txt&#034;]).load_data()<br \/>\n# \u5b9a\u4e49\u6587\u672c\u5206\u5272\u5668<br \/>\ntext_splitter &#061; SentenceSplitter(chunk_size&#061;256, chunk_overlap&#061;30)<\/p>\n<p>&#034;&#034;&#034;<br \/>\n    \u63d0\u53d6\u5668&#xff0c;\u7ed9\u6587\u6863\u6dfb\u52a0\u6807\u9898<br \/>\n        nodes&#061;5&#xff0c;\u8868\u793a5\u4e2a\u8282\u70b9<br \/>\n        node_template&#061;&#034;\u8bf7\u4e3a\u4ee5\u4e0b\u6587\u6863\u751f\u6210\u4e00\u4e2a\u7b80\u6d01\u7684\u6807\u9898: {context_str}&#034; \u63d0\u793a\u8bcd<br \/>\n        num_workers&#061;5 \u5f00\u51e0\u4e2a\u7ebf\u7a0b\u505a\u8fd9\u4ef6\u4e8b&#xff0c;\u6211\u4eec\u7684\u4ee3\u7801\u90fd\u662f\u8dd1\u5728\u7ebf\u7a0b\u4e2d\u7684&#xff0c;\u53ef\u4ee5\u628a\u7ebf\u7a0b\u7406\u89e3\u4e3a\u5de5\u4eba<br \/>\n        llm\u4f7f\u7528\u7684\u5927\u6a21\u578b<br \/>\n    \u8fde\u8d77\u6765\u7684\u610f\u601d\u662f\u5f00\u542fnum_workers\u4e2a\u7ebf\u7a0b\u4f7f\u7528llm\u5bf9\u524dnodes\u4e2a\u8282\u70b9&#xff0c;node_template\u4e00\u6b21&#xff08;\u4e5f\u5c31\u662f\u7ed9\u8282\u70b9\u751f\u6210\u6807\u9898&#xff09;&#xff0c;\u5e76\u653e\u5230\u5143\u6570\u636e\u4e2d<br \/>\n    \u5c31\u8ddf\u8bba\u6587\u4e2d\u5f00\u5934\u90e8\u5206\u7684\u603b\u7ed3&#xff0c;\u8fd9\u91cc\u662f\u5bf9\u524d5\u4e2a\u8282\u70b9\u505a\u603b\u7ed3&#xff0c;\u8fd9\u4e2a\u751f\u6210\u7684\u6807\u9898\u4f1a\u5199\u5230\u6240\u6709\u8282\u70b9\u7684\u5143\u6570\u636e\u4e2d&#xff0c;\u8fd9\u6837\u5c31\u80fd\u901a\u8fc7\u603b\u7ed3\u6765\u5224\u65ad\u8981\u4e0d\u8981\u8bfb\u53d6\u5f53\u524d\u7684\u8282\u70b9\u4e86<br \/>\n&#034;&#034;&#034;<br \/>\ntitle_extractor &#061; TitleExtractor(nodes&#061;5, node_template&#061;&#034;\u8bf7\u4e3a\u4ee5\u4e0b\u6587\u6863\u751f\u6210\u4e00\u4e2a\u7b80\u6d01\u7684\u6807\u9898: {context_str}&#034;, num_workers&#061;5, llm&#061;llm)<\/p>\n<p># \u521b\u5efa\u6570\u636e\u6444\u53d6\u7ba1\u9053<br \/>\n&#034;&#034;&#034;<br \/>\n    \u8fd9\u91cc\u662f\u521b\u5efa\u4e00\u4e2a\u7ba1\u9053&#xff0c;\u5b83\u4f1a\u5148\u6267\u884ctext_splitter&#xff0c;\u518d\u6267\u884cembed_model&#xff0c;\u518d\u6267\u884ctitle_extractor<br \/>\n    \u5982\u679c\u662f transformations&#061;[text_splitter,title_extractor, embed_model] \u8fd9\u6837\u7684<br \/>\n    \u5b83\u4f1a\u5148\u6267\u884ctext_splitter&#xff0c;\u518d\u6267\u884ctitle_extractor&#xff0c;\u518d\u6267\u884cembed_model<br \/>\n    \u8fd9\u91cc\u5c31\u662f\u628a\u6211\u4eec\u6587\u6863\u64cd\u4f5c\u7684\u6b65\u9aa4&#xff08;\u6587\u6863\u5206\u7247\u3001\u5411\u91cf\u3001\u6dfb\u52a0\u6807\u9898&#xff09;\u7ed9\u62fc\u63a5\u597d&#xff0c;\u4e5f\u5c31\u662f\u7ec4\u88c5\u4e00\u4e2a\u6d41\u6c34\u7ebf<br \/>\n&#034;&#034;&#034;<br \/>\npipeline &#061; IngestionPipeline(<br \/>\n    transformations&#061;[text_splitter, embed_model, title_extractor]<br \/>\n)<\/p>\n<p># \u6267\u884c\u7ba1\u9053&#xff0c;\u8fd4\u56de\u7684\u662f\u6240\u6709\u8282\u70b9\u7684\u4fe1\u606f<br \/>\nnodes &#061; pipeline.run(documents&#061;documents)<\/p>\n<p># \u6253\u5370\u5904\u7406\u540e\u7684\u8282\u70b9<br \/>\nfor node in nodes:<br \/>\n    print(repr(node))<br \/>\n    print(&#034;&#8212;&#8212;-&#034;)<\/p>\n<p># \u521b\u5efa\u7d22\u5f15&#xff0c;nodes\u662f\u6240\u6709\u7684\u6587\u6863\u8282\u70b9&#xff0c;embed_model\u662f\u7528\u5230\u7684\u5411\u91cf\u6a21\u578b<br \/>\nindex &#061; VectorStoreIndex(nodes, embed_model&#061;embed_model)<br \/>\n# index.as_retriever()\u521b\u5efa\u68c0\u7d22\u5668&#xff0c;index.as_retriever().retrieve\u68c0\u7d22<br \/>\nprint(index.as_retriever().retrieve(&#039;\u8427\u708e\u7236\u4eb2\u662f\u8c01&#039;).json)<\/p>\n<hr \/>\n<p class=\"img-center\"><img decoding=\"async\" alt=\"img\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/07\/20260725183954-6a6502fa96020.png\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5185\u5bb9\u53c2\u8003\u4e8e&#xff1a;\u56fe\u7075AI\u5927\u6a21\u578b\u5168\u6808\u6444\u53d6\u7ba1\u9053\u73b0\u5728\u6709\u8fd9\u6837\u7684\u4e00\u4ef6\u4e8b\u60c5&#xff0c;\u6709\u4e00\u4e2a\u6587\u6863A\u7528\u6237\u4e0a\u4f20\u4e86\u4e00\u6b21&#xff0c;B\u7528\u6237\u4e0a\u4f20\u4e86\u4e00\u6b21&#xff0c;\u4e00\u4e2a\u6587\u6863\u4e0a\u4f20\u4e86\u4e24\u6b21\u8fd9\u79cd\u60c5\u51b5\u8981\u505a\u4e24\u6b21RAG\u7684\u77e5\u8bc6\u5e93\u5417&#xff1f;\u8fd9\u91cc\u5c31\u6709\u4e24\u4e2a\u6982\u5ff5 \u5168\u91cf\u66f4\u65b0\u548c\u589e\u91cf\u66f4\u65b0\u5168\u91cf\u66f4\u65b0&#xff1a;\u4e0a\u4f20\u4e00\u6b21\u6587\u6863\u5c31\u628a\u4e4b\u524d\u7684\u5168\u5220\u4e86&#xff0c;\u6839\u636e\u8fd9\u6b21\u4e0a\u4f20\u7684\u6587\u6863\u751f\u6210RAG\u77e5\u8bc6\u5e93&#xff0c;\u6709\u5f88\u591a\u6846\u67b6\u90fd\u662f\u8fd9\u6837\u641e\u7684\u589e\u91cf\u66f4\u65b0&#xff1a;\u4e0a\u4f20\u4e00\u6b21\u6587\u6863&#xff0c;\u5148\u67e5\u770b\u8fd9\u6b21\u4e0a\u4f20\u7684\u6587\u6863\u4e2d\u7684<\/p>\n","protected":false},"author":2,"featured_media":83728,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[9382,9381,9383,50],"topic":[],"class_list":["post-83730","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-llama_index","tag-llamaindex","tag-9383","tag-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - 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content=\"\u5185\u5bb9\u53c2\u8003\u4e8e&#xff1a;\u56fe\u7075AI\u5927\u6a21\u578b\u5168\u6808\u6444\u53d6\u7ba1\u9053\u73b0\u5728\u6709\u8fd9\u6837\u7684\u4e00\u4ef6\u4e8b\u60c5&#xff0c;\u6709\u4e00\u4e2a\u6587\u6863A\u7528\u6237\u4e0a\u4f20\u4e86\u4e00\u6b21&#xff0c;B\u7528\u6237\u4e0a\u4f20\u4e86\u4e00\u6b21&#xff0c;\u4e00\u4e2a\u6587\u6863\u4e0a\u4f20\u4e86\u4e24\u6b21\u8fd9\u79cd\u60c5\u51b5\u8981\u505a\u4e24\u6b21RAG\u7684\u77e5\u8bc6\u5e93\u5417&#xff1f;\u8fd9\u91cc\u5c31\u6709\u4e24\u4e2a\u6982\u5ff5 \u5168\u91cf\u66f4\u65b0\u548c\u589e\u91cf\u66f4\u65b0\u5168\u91cf\u66f4\u65b0&#xff1a;\u4e0a\u4f20\u4e00\u6b21\u6587\u6863\u5c31\u628a\u4e4b\u524d\u7684\u5168\u5220\u4e86&#xff0c;\u6839\u636e\u8fd9\u6b21\u4e0a\u4f20\u7684\u6587\u6863\u751f\u6210RAG\u77e5\u8bc6\u5e93&#xff0c;\u6709\u5f88\u591a\u6846\u67b6\u90fd\u662f\u8fd9\u6837\u641e\u7684\u589e\u91cf\u66f4\u65b0&#xff1a;\u4e0a\u4f20\u4e00\u6b21\u6587\u6863&#xff0c;\u5148\u67e5\u770b\u8fd9\u6b21\u4e0a\u4f20\u7684\u6587\u6863\u4e2d\u7684\" 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