{"id":20308,"date":"2026-02-08T20:38:49","date_gmt":"2026-02-08T12:38:49","guid":{"rendered":"https:\/\/92it.top\/?p=20308"},"modified":"2026-02-24T08:44:03","modified_gmt":"2026-02-24T00:44:03","slug":"langchain-%e5%9c%a8%e7%9c%9f%e5%ae%9e%e7%94%9f%e4%ba%a7%e7%8e%af%e5%a2%83%e7%9a%84-5-%e4%b8%aa%e5%9d%91","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=20308","title":{"rendered":"LangChain \u5728\u771f\u5b9e\u751f\u4ea7\u73af\u5883\u7684 5 \u4e2a\u5751_\u7cfb\u52174"},"content":{"rendered":"\n<p>\u8f6c\u8f7d\uff1a\u5c0f\u7ea2\u4e66 AI\u4ea7\u54c1\u8d75\u54e5<\/p>\n\n\n\n<p><strong>\u524d\u8a00\ud83d\udd16<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u524d\u4e24\u7bc7\u7b14\u8bb0\uff0c\u6211\u4eec\u804a\u4e86 LangChain \u7684\u57fa\u7840\u7ec4\u4ef6 Model\u3001Prompt\u3001Chain\uff0c\u4e5f\u8bb2\u4e86\u5982\u4f55\u50cf\u5199\u4ee3\u7801\u4e00\u6837\u53bb\u7ba1\u7406\u4f60\u7684 Prompt\u3002\u6700\u8fd1\u6211\u5728\u505a\u4e00\u4e9b AI \u5e94\u7528\u4ea7\u54c1\u7684\u843d\u5730\uff0c\u4e5f\u5728\u5e26\u51e0\u4e2a\u5185\u90e8\u5c0f\u4f19\u4f34\u505a\u51e0\u4e2a\u5c0f\u9879\u76ee\u3002\u901a\u8fc7\u524d\u51e0\u7bc7\u7b14\u8bb0\u7684\u95f2\u804a\uff0c\u5f88\u591a\u5c0f\u4f19\u4f34\uff08\u4e3b\u8981\u662f\u4ea7\u54c1\u540c\u5b66\uff09\u5bf9 AI \u5e94\u7528\u5c42\u7684\u5f00\u53d1\u5145\u6ee1\u4e86\u4fe1\u5fc3\u3002\u4f46\u6211\u5fc5\u987b\u7ed9\u4f60\u6cfc\u4e00\u76c6\u51b7\u6c34\uff1a<strong>Demo \u548c Production\uff08\u751f\u4ea7\u73af\u5883\uff09\u4e4b\u95f4\uff0c\u9694\u7740\u5341\u4e07\u516b\u5343\u91cc\u3002<\/strong><\/p>\n\n\n\n<p>\u5f88\u591a AI \u4ea7\u54c1\u7ecf\u7406\u6700\u75db\u82e6\u7684\u65f6\u523b\uff0c\u4e0d\u662f\u60f3\u4e0d\u51fa Idea\uff0c\u800c\u662f Demo \u6f14\u793a\u65f6\u8001\u677f\u60ca\u547c \u201c\u725b\u30fb13\u201d\uff0c\u4e0a\u7ebf\u7b2c\u4e00\u5929\u5374\u88ab\u7528\u6237\u9a82 \u201c\u50bb\u30fb13\u201d\u3002\u54cd\u5e94\u592a\u6162\u3001\u80e1\u8bf4\u516b\u9053\u3001Token \u8d39\u7528\u7206\u70b8\u3001\u591a\u8f6e\u5bf9\u8bdd\u540e\u7a81\u7136\u5931\u5fc6\u2026\u2026 \u8fd9\u4e9b\u95ee\u9898\u5728\u672c\u5730\u6d4b\u8bd5\u65f6\u5f80\u5f80\u4f1a\u88ab\u5ffd\u7565\u3002<\/p>\n\n\n\n<p>\u6b63\u597d\u8d76\u4e0a\u5468\u672b\u6709\u65f6\u95f4\uff0c\u628a\u6211\u7528 LangChain \u9047\u5230\u7684\u5751\u603b\u7ed3\u51fa\u6765\uff0c\u548c\u5927\u5bb6\u5171\u52c9\u3002\u6211\u603b\u7ed3\u4e86\u8fc7\u53bb\u4e00\u5e74\u5728 LangChain \u751f\u4ea7\u73af\u5883\u843d\u5730\u4e2d\u6700\u5bb9\u6613\u8e29\u7684 5 \u4e2a\u6df1\u5751\u3002\u8fd9\u4e9b\u5751\uff0c\u6bcf\u4e00\u4e2a\u90fd\u662f\u7528\u771f\u91d1\u767d\u94f6\u7684 Token \u8d39\u548c\u7528\u6237\u6d41\u5931\u6362\u6765\u7684\u6559\u8bad\u3002<\/p>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p><strong>\u5751\u4e00\uff1aToken \u7206\u70b8\u4e0e\u4e0a\u4e0b\u6587\u8d85\u9650\ud83d\udd16<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u8fd9\u662f\u65b0\u624b\u6700\u5bb9\u6613\u5ffd\u89c6\uff0c\u4e5f\u662f\u540e\u679c\u6700\u76f4\u63a5\u7684\u4e00\u4e2a\u5751\u3002<\/p>\n\n\n\n<p><strong>\u73b0\u8c61\u63cf\u8ff0\uff1a<\/strong><\/p>\n\n\n\n<p>\u4f60\u5728\u672c\u5730\u6d4b\u8bd5\u65f6\uff0c\u5bf9\u8bdd\u90fd\u5f88\u77ed\uff0c\u4e00\u822c\u4e5f\u5c31\u4e24\u4e09\u8f6e\uff1a\u201c\u4f60\u597d\u201d\u3001\u201c\u4f60\u662f\u8c01\u201d\u3001\u201c\u5e2e\u6211\u5199\u9996\u8bd7\u201d\u3002\u4e00\u5207\u6b63\u5e38\u3002<\/p>\n\n\n\n<p>\u4f46\u5728\u751f\u4ea7\u73af\u5883\u4e2d\uff0c\u7528\u6237\u53ef\u80fd\u4f1a\u7c98\u8d34\u4e00\u7bc7 5000 \u5b57\u7684\u6587\u7ae0\u8ba9\u4f60\u603b\u7ed3\uff0c\u6216\u8005\u540c\u4e00\u4e2a Session \u804a\u4e86 50 \u8f6e\u3002<\/p>\n\n\n\n<p>\u7ed3\u679c\u53ea\u6709\u4e24\u79cd\uff1a<\/p>\n\n\n\n<ol>\n<li>\u7a0b\u5e8f\u76f4\u63a5\u62a5\u9519\uff1a\u63d0\u793a <code>InvalidRequestError: This model's maximum context length is 4097 tokens...<\/code>\u3002<\/li>\n\n\n\n<li>\u8d26\u5355\u7206\u70b8\uff1a\u6708\u5e95\u6536\u5230 OpenAI \u6216\u4e91\u5382\u5546\u7684\u8d26\u5355\uff0c\u53d1\u73b0\u8d39\u7528\u662f\u9884\u4f30\u7684 10 \u500d\u3002<\/li>\n<\/ol>\n\n\n\n<p><strong>\u6839\u56e0\u5206\u6790\uff1a<\/strong><\/p>\n\n\n\n<p>\u5927\u6a21\u578b\u662f\u65e0\u72b6\u6001\u7684\uff0c\u4e3a\u4e86\u8ba9\u5b83 \u201c\u8bb0\u4f4f\u201d \u4e4b\u524d\u7684\u5bf9\u8bdd\uff0cLangChain \u9ed8\u8ba4\u4f1a\u5c06\u5386\u53f2\u804a\u5929\u8bb0\u5f55\uff08History\uff09\u4e00\u80a1\u8111\u5730\u585e\u8fdb Prompt \u91cc\u53d1\u7ed9\u6a21\u578b\u3002<\/p>\n\n\n\n<p>\u968f\u7740\u5bf9\u8bdd\u8f6e\u6570\u589e\u52a0\uff0cPrompt \u7684\u957f\u5ea6\u5448\u7ebf\u6027\u751a\u81f3\u6307\u6570\u7ea7\u589e\u957f\u3002<\/p>\n\n\n\n<p>OpenAI \u7b49\u5382\u5546\u662f\u6309 Input + Output \u7684\u603b Token \u6570\u8ba1\u8d39\u7684\u3002\u8fd9\u610f\u5473\u7740\uff0c\u5373\u4f7f\u7528\u6237\u53ea\u662f\u56de\u4e86\u4e00\u4e2a \u201c\u55ef\u201d\uff0c\u4f60\u53ef\u80fd\u4e3a\u4e86\u7ef4\u6301\u4e0a\u4e0b\u6587\uff0c\u5b9e\u9645\u4e0a\u7ed9\u6a21\u578b\u53d1\u4e86 3000 \u4e2a Token \u7684\u5386\u53f2\u8bb0\u5f55\u3002\u8fd9 3000 \u4e2a Token \u90fd\u8981\u7b97\u94b1\u3002<\/p>\n\n\n\n<p><strong>\u751f\u4ea7\u7ea7\u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n\n\n\n<ol>\n<li><strong>\u5f15\u5165 Token \u8ba1\u7b97\u4e0e\u9884\u8b66\u673a\u5236<\/strong>\u4e0d\u8981\u7b49\u5230\u62a5\u9519\u624d\u53d1\u73b0\u3002\u5728 Python \u4e2d\uff0c\u5fc5\u987b\u4f7f\u7528 <code>tiktoken<\/code> \u5e93\u5728\u53d1\u9001\u8bf7\u6c42\u524d\u9884\u8ba1\u7b97 Token \u6570\u91cf\u3002\u5982\u679c\u8d85\u8fc7\u9608\u503c\uff08\u6bd4\u5982\u6a21\u578b\u4e0a\u9650\u7684 80%\uff09\uff0c\u5fc5\u987b\u8fdb\u884c\u622a\u65ad\u3002<\/li>\n\n\n\n<li><strong>\u4f7f\u7528\u6ed1\u52a8\u7a97\u53e3\u5185\u5b58\uff08ConversationBufferWindowMemory\uff09<\/strong>\u4e0d\u8981\u4fdd\u5b58\u6240\u6709\u5386\u53f2\u3002\u53ea\u4fdd\u7559\u6700\u8fd1\u7684 k \u8f6e\uff08\u4f8b\u5982\u6700\u8fd1 10 \u8f6e\uff09\u3002\u5bf9\u4e8e\u5927\u591a\u6570\u4e1a\u52a1\u573a\u666f\uff0c10 \u8f6e\u4e4b\u524d\u7684\u5bf9\u8bdd\u7ec6\u8282\u901a\u5e38\u4e0d\u518d\u91cd\u8981\u3002<\/li>\n\n\n\n<li><strong>\u4f7f\u7528\u6458\u8981\u5185\u5b58\uff08ConversationSummaryMemory\uff09<\/strong>\u8fd9\u662f\u66f4\u9ad8\u7ea7\u7684\u73a9\u6cd5\u3002\u5f53\u5bf9\u8bdd\u5386\u53f2\u8fc7\u957f\u65f6\uff0c\u8ba9 LLM \u81ea\u52a8\u628a\u4e4b\u524d\u7684\u5bf9\u8bdd\u603b\u7ed3\u6210\u4e00\u6bb5\u8bdd\uff08Summary\uff09\uff0c\u7136\u540e\u628a\u8fd9\u6bb5 Summary \u4f5c\u4e3a System Prompt \u7684\u4e00\u90e8\u5206\uff0c\u66ff\u6362\u6389\u5197\u957f\u7684\u539f\u59cb\u5bf9\u8bdd\u8bb0\u5f55\u3002\n<ul>\n<li>\u539f\u59cb\u5386\u53f2\uff1a\u7528\u6237\u95ee A\uff0cAI \u7b54 B\uff0c\u7528\u6237\u95ee C\uff0cAI \u7b54 D\u2026\uff08\u6d88\u8017 2000 Token\uff09<\/li>\n\n\n\n<li>\u6458\u8981\u540e\uff1a\u201c\u7528\u6237\u4e4b\u524d\u8be2\u95ee\u4e86\u5173\u4e8e A \u548c C \u7684\u95ee\u9898\uff0cAI \u63d0\u4f9b\u4e86\u8be6\u7ec6\u89e3\u7b54\u3002\u201d\uff08\u6d88\u8017 50 Token\uff09<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p><strong>\u4ea7\u54c1\u7ecf\u7406\u51b3\u7b56\u70b9\uff1a<\/strong><\/p>\n\n\n\n<p>\u4f60\u9700\u8981\u5b9a\u4e49\u4ea7\u54c1\u7684<strong>\u8bb0\u5fc6\u7b56\u7565<\/strong>\u3002\u662f\u4e0d\u4ec5\u9650\u957f\u5ea6\u4f46\u8d39\u94b1\uff08\u9002\u5408\u4e13\u4e1a\u54a8\u8be2\uff09\uff0c\u8fd8\u662f\u53ea\u8bb0\u6700\u8fd1\u51e0\u53e5\uff08\u9002\u5408\u95f2\u804a\uff09\uff0c\u6216\u8005\u662f\u5b9a\u671f\u603b\u7ed3\uff08\u5e73\u8861\u65b9\u6848\uff09\u3002\u4e0d\u8981\u8ba9\u5f00\u53d1\u7528\u9ed8\u8ba4\u914d\u7f6e\u3002<\/p>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p><strong>\u5751\u4e8c\uff1a\u6d41\u5f0f\u8f93\u51fa\uff08Streaming\uff09\ud83d\udd16<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>\u73b0\u8c61\u63cf\u8ff0\uff1a<\/strong><\/p>\n\n\n\n<p>\u4f60\u7684 Chatbot \u4e0a\u7ebf\u4e86\uff0c\u7528\u6237\u95ee\u4e86\u4e00\u4e2a\u590d\u6742\u95ee\u9898\u3002<\/p>\n\n\n\n<p>\u7136\u540e\uff0c\u5c4f\u5e55\u9ed1\u5c4f\u4e86 8 \u79d2\u949f\u3002<\/p>\n\n\n\n<p>\u7528\u6237\u4ee5\u4e3a\u7f51\u65ad\u4e86\uff0c\u6216\u8005 App \u6b7b\u673a\u4e86\uff0c\u75af\u72c2\u70b9\u51fb\u5237\u65b0\uff0c\u751a\u81f3\u76f4\u63a5\u9000\u51fa\u3002<\/p>\n\n\n\n<p>\u7b2c 9 \u79d2\uff0c\u4e00\u5927\u6bb5\u6587\u5b57\u7a81\u7136\u8e66\u51fa\u6765\u3002<\/p>\n\n\n\n<p><strong>\u6839\u56e0\u5206\u6790\uff1a<\/strong><\/p>\n\n\n\n<p>\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cLangChain \u7684 <code>invoke<\/code> \u65b9\u6cd5\u662f\u540c\u6b65\u7b49\u5f85\u7684\u3002\u5b83\u4f1a\u7b49\u6a21\u578b\u628a\u6700\u540e\u4e00\u4e2a\u5b57\u751f\u6210\u5b8c\uff0c\u624d\u4e00\u6b21\u6027\u628a\u7ed3\u679c\u8fd4\u56de\u7ed9\u4f60\u3002<\/p>\n\n\n\n<p>\u6bd4\u5982\u8bf4\uff0cGPT-4 \u751f\u6210 500 \u5b57\u53ef\u80fd\u9700\u8981 10-20 \u79d2\uff0c\u8fd9\u5728\u4e92\u8054\u7f51\u4ea7\u54c1\u4f53\u9a8c\u4e2d\u662f\u4e0d\u53ef\u63a5\u53d7\u7684\u3002<\/p>\n\n\n\n<p><strong>\u751f\u4ea7\u7ea7\u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n\n\n\n<ol>\n<li><strong>\u5168\u94fe\u8def\u6d41\u5f0f\u6539\u9020\uff08Streaming\uff09<\/strong>\uff1a\u5fc5\u987b\u4f7f\u7528 LangChain \u7684 <code>stream<\/code> \u63a5\u53e3\uff0c\u914d\u5408\u524d\u7aef\u7684 SSE\uff08Server-Sent Events\uff09\u6216 WebSocket\u3002\u8ba9\u6a21\u578b\u751f\u6210\u4e00\u4e2a\u5b57\uff0c\u524d\u7aef\u5c31\u663e\u793a\u4e00\u4e2a\u5b57\u3002\u867d\u7136\u6574\u4f53\u751f\u6210\u65f6\u95f4\u6ca1\u53d8\uff0c\u4f46<strong>\u9996\u5b57\u5ef6\u8fdf\uff08Time to First Token\uff0cTTFT\uff09<\/strong> \u4f1a\u7f29\u77ed\u5230 1 \u79d2\u4ee5\u5185\uff0c\u7528\u6237\u4f53\u9a8c\u5b8c\u5168\u4e0d\u540c\u3002<\/li>\n\n\n\n<li><strong>\u5904\u7406 \u201c\u601d\u8003\u4e2d\u201d \u7684\u72b6\u6001\uff1a<\/strong>\u5728 RAG\uff08\u68c0\u7d22\u589e\u5f3a\u751f\u6210\uff09\u573a\u666f\u4e0b\uff0c\u68c0\u7d22\u6587\u6863\u662f\u9700\u8981\u65f6\u95f4\u7684\uff08\u6bd4\u5982 2 \u79d2\uff09\u3002\u5728\u8fd9 2 \u79d2\u771f\u7a7a\u671f\uff0c\u4e0d\u80fd\u8ba9\u754c\u9762\u5361\u6b7b\u3002\u4ea7\u54c1\u8bbe\u8ba1\u4e0a\uff0c\u9700\u8981\u589e\u52a0 **\u201c\u6b63\u5728\u641c\u7d22\u77e5\u8bc6\u5e93\u2026\u201d<strong>\u3001<\/strong>\u201c\u6b63\u5728\u9605\u8bfb\u6587\u6863\u2026\u201d** \u8fd9\u6837\u7684\u4e2d\u95f4\u72b6\u6001\u63d0\u793a\u3002<\/li>\n<\/ol>\n\n\n\n<p><strong>\u4ea7\u54c1\u7ecf\u7406\u51b3\u7b56\u70b9\uff1a<\/strong><\/p>\n\n\n\n<p>\u5728 PRD \u91cc\u5199\u6e05\u695a\uff1a<strong>\u6240\u6709\u5bf9\u8bdd\u4ea4\u4e92\u5fc5\u987b\u652f\u6301\u6d41\u5f0f\u8f93\u51fa<\/strong>\u3002<\/p>\n\n\n\n<p>\u8fd9\u4e0d\u4ec5\u4ec5\u662f\u524d\u7aef\u6539 UI\uff0c\u540e\u7aef\u4ee3\u7801\u903b\u8f91\uff08\u6bd4\u5982\uff1a\u5982\u4f55\u5904\u7406 Chain \u7684\u56de\u8c03\uff09\u5b8c\u5168\u4e0d\u540c\u3002\u5982\u679c\u524d\u671f\u6ca1\u5b9a\u597d\uff0c\u540e\u671f\u91cd\u6784\u5de5\u4f5c\u91cf\u5de8\u5927\u3002<\/p>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p><strong>\u5751\u4e09\uff1aRAG \u4e2d\u7684 \u201c\u5783\u573e\u8fdb\uff0c\u5783\u573e\u51fa\u201d\ud83d\udd16<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>RAG\uff08Retrieval-Augmented Generation\uff09\u662f\u76ee\u524d\u6700\u706b\u7684\u5e94\u7528\u6a21\u5f0f\uff0c\u5373 \u201c\u6302\u8f7d\u77e5\u8bc6\u5e93\u201d\u3002<\/p>\n\n\n\n<p><strong>\u73b0\u8c61\u63cf\u8ff0\uff1a<\/strong><\/p>\n\n\n\n<p>\u4f60\u628a\u516c\u53f8\u7684 PDF \u64cd\u4f5c\u624b\u518c\u5207\u7247\u5b58\u8fdb\u4e86\u5411\u91cf\u6570\u636e\u5e93\u3002<\/p>\n\n\n\n<p>\u7528\u6237\u95ee\uff1a\u201c\u600e\u4e48\u91cd\u7f6e\u5bc6\u7801\uff1f\u201d<\/p>\n\n\n\n<p>AI \u56de\u7b54\uff1a\u201c\u6839\u636e\u6587\u6863\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u70b9\u51fb\u8bbe\u7f6e\u6309\u94ae\u6765\u8c03\u6574\u5c4f\u5e55\u4eae\u5ea6\u3002\u201d<\/p>\n\n\n\n<p>\u6216\u8005 AI \u56de\u7b54\uff1a\u201c\u6587\u6863\u91cc\u6ca1\u8bf4\u3002\u201d \u4f46\u5b9e\u9645\u4e0a\u6587\u6863\u7b2c 50 \u9875\u660e\u660e\u5199\u4e86\u3002<\/p>\n\n\n\n<p><strong>\u6839\u56e0\u5206\u6790\uff1a<\/strong><\/p>\n\n\n\n<p>\u8fd9\u901a\u5e38\u4e0d\u662f\u6a21\u578b\uff08Brain\uff09\u7684\u95ee\u9898\uff0c\u800c\u662f\u68c0\u7d22\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n<ol>\n<li>\u5207\u7247\uff08Chunking\uff09\u7b56\u7565\u592a\u7c97\u7cd9\uff1a\u9ed8\u8ba4\u628a\u6587\u6863\u6309 1000 \u5b57\u5207\u4e00\u6bb5\u3002\u7ed3\u679c \u201c\u91cd\u7f6e\u5bc6\u7801\u201d \u7684\u6807\u9898\u5728\u8fd9\u4e00\u6bb5\u7684\u7ed3\u5c3e\uff0c\u5177\u4f53\u6b65\u9aa4\u5728\u4e0b\u4e00\u6bb5\u7684\u5f00\u5934\u3002\u5207\u5206\u5bfc\u81f4\u4e0a\u4e0b\u6587\u4e22\u5931\u3002<\/li>\n\n\n\n<li>\u68c0\u7d22\u5339\u914d\u5ea6\u4f4e\uff1a\u5411\u91cf\u68c0\u7d22\uff08Vector Search\uff09\u57fa\u4e8e\u8bed\u4e49\u76f8\u4f3c\u5ea6\u3002\u6709\u65f6\u5019\u7528\u6237\u7684\u95ee\u9898\u5173\u952e\u8bcd\u548c\u6587\u6863\u91cc\u7684\u8bcd\u6c47\u4e0d\u5b8c\u5168\u5339\u914d\uff0c\u6216\u8005\u5411\u91cf\u6a21\u578b\u8ba4\u4e3a \u201c\u4fee\u6539\u5bc6\u7801\u201d \u548c \u201c\u8d26\u6237\u5b89\u5168\u201d \u66f4\u76f8\u4f3c\uff0c\u6293\u56de\u6765\u4e00\u5806\u65e0\u5173\u7684 \u201c\u5b89\u5168\u5b88\u5219\u201d\uff0c\u5374\u6f0f\u6389\u4e86\u5b9e\u64cd\u6b65\u9aa4\u3002<\/li>\n<\/ol>\n\n\n\n<p><strong>\u751f\u4ea7\u7ea7\u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n\n\n\n<ol>\n<li>\u4f18\u5316\u5207\u7247\u7b56\u7565\uff08Text Splitters\uff09\uff1a\u4e0d\u8981\u53ea\u7528\u7b80\u5355\u7684\u5b57\u7b26\u6570\u5207\u5206\u3002\u4f7f\u7528<code>RecursiveCharacterTextSplitter<\/code>\uff0c\u5e76\u8bbe\u7f6e\u5408\u7406\u7684 Overlap\uff08\u91cd\u53e0\u533a\uff09\u3002\n<ul>\n<li>\u793a\u4f8b\uff1a\u6bcf\u4e2a\u5757 500 \u5b57\uff0c\u4f46\u6bcf\u4e2a\u5757\u548c\u4e0b\u4e00\u4e2a\u5757\u6709 100 \u5b57\u7684\u91cd\u53e0\u3002\u8fd9\u6837\u80fd\u4fdd\u8bc1\u8de8\u5757\u7684\u53e5\u5b50\u4e0d\u4f1a\u88ab\u5207\u65ad\u3002\u4e00\u822c overlap \u662f\u5757\u957f\u7684 10%\uff5e20%\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5f15\u5165\u91cd\u6392\u5e8f\uff08Re-ranking\uff09\uff1a\u8fd9\u662f\u63d0\u5347 RAG \u51c6\u786e\u7387\u7684\u795e\u5668\u3002\n<ul>\n<li>\u6d41\u7a0b\uff1a\u5148\u7c97\u6392\uff0c\u7528\u5411\u91cf\u641c\u7d22\u6293\u56de 20 \u4e2a\u76f8\u5173\u7684\u6587\u6863\u5757\u3002\u7136\u540e\u5f15\u5165\u4e00\u4e2a\u7cbe\u6392\u6a21\u578b\uff08\u5982 BGE-Reranker\uff09\uff0c\u4e13\u95e8\u5224\u65ad\u8fd9 20 \u4e2a\u5757\u8ddf\u7528\u6237\u95ee\u9898\u7684\u76f8\u5173\u6027\uff0c\u9009\u51fa\u6700\u51c6\u7684 3 \u4e2a\u7ed9 LLM\u3002<\/li>\n\n\n\n<li>\u7ecf\u9a8c\u6570\u636e\uff1a\u52a0\u4e0a Rerank\uff0c\u51c6\u786e\u7387\u901a\u5e38\u80fd\u63d0\u5347 20%-30%\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u6df7\u5408\u68c0\u7d22\uff08Hybrid Search\uff09\uff1a\u5411\u91cf\u641c\u7d22\u5bf9 \u201c\u8bed\u4e49\u201d \u654f\u611f\uff0c\u4f46\u5bf9 \u201c\u4e13\u6709\u540d\u8bcd\u201d \u8fdf\u949d\uff08\u6bd4\u5982\u4ea7\u54c1\u578b\u53f7\u3001\u4ea7\u54c1\u540d\u79f0\u7b49\uff09\u3002\u751f\u4ea7\u73af\u5883\u901a\u5e38\u7ed3\u5408 ** \u5173\u952e\u8bcd\u641c\u7d22\uff08BM25\uff09** \u548c\u5411\u91cf\u641c\u7d22\u3002<\/li>\n<\/ol>\n\n\n\n<p><strong>\u4ea7\u54c1\u7ecf\u7406\u51b3\u7b56\u70b9\uff1a<\/strong><\/p>\n\n\n\n<p>\u4e0d\u8981\u8ff7\u4fe1 \u201c\u628a\u6587\u4ef6\u4e22\u8fdb\u53bb\u5c31\u884c\u4e86\u201d\u3002\u4f60\u9700\u8981\u5efa\u7acb\u6d4b\u8bd5\u96c6\u3002\u51c6\u5907 50 \u4e2a\u771f\u5b9e\u95ee\u9898\u548c\u6807\u51c6\u7b54\u6848\uff0c\u6bcf\u6b21\u8c03\u6574\u5207\u7247\u53c2\u6570\u6216\u68c0\u7d22\u7b56\u7565\u540e\uff0c\u8dd1\u4e00\u904d\u6d4b\u8bd5\uff0c\u770b ** \u53ec\u56de\u7387\uff08Recall\uff09<strong>\u548c<\/strong>\u51c6\u786e\u7387\uff08Accuracy\uff09** \u7684\u53d8\u5316\u3002<\/p>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p><strong>\u5751\u56db\uff1a\u4e0d\u7a33\u5b9a\u7684\u8f93\u51fa\u683c\u5f0f\uff08JSON Parse Error\uff09\ud83d\udd16<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>\u73b0\u8c61\u63cf\u8ff0\uff1a<\/strong><\/p>\n\n\n\n<p>\u4f60\u505a\u4e86\u4e00\u4e2a\u4ece\u7b80\u5386\u63d0\u53d6\u4fe1\u606f\u7684\u5de5\u5177\uff0c\u8981\u6c42\u6a21\u578b\u8f93\u51fa JSON\u3002<\/p>\n\n\n\n<p>Prompt \u5199\u5f97\u5f88\u597d\uff1a\u201c\u8bf7\u53ea\u8f93\u51fa JSON\uff0c\u4e0d\u8981\u5e9f\u8bdd\u201d\u3002<\/p>\n\n\n\n<p>\u6d4b\u8bd5\u65f6\u633a\u597d\uff0c\u4e0a\u7ebf\u540e\uff0c\u6bcf 100 \u6b21\u8c03\u7528\u5c31\u6709 5 \u6b21\u62a5\u9519\u3002<\/p>\n\n\n\n<p>\u67e5\u770b\u65e5\u5fd7\u53d1\u73b0\uff0c\u6a21\u578b\u6709\u65f6\u5019\u4f1a\u5728 JSON \u524d\u9762\u52a0\u4e00\u53e5\uff1a\u201c\u597d\u7684\uff0c\u8fd9\u662f\u63d0\u53d6\u7ed3\u679c\uff1a{&#8230;}\u201d\uff0c\u6216\u8005 JSON \u5c11\u4e86\u4e00\u4e2a\u5927\u62ec\u53f7\u3002<\/p>\n\n\n\n<p>\u5bfc\u81f4\u540e\u7aef\u89e3\u6790\u4ee3\u7801\u76f4\u63a5 Crash\u3002<\/p>\n\n\n\n<p><strong>\u6839\u56e0\u5206\u6790\uff1a<\/strong><\/p>\n\n\n\n<p>LLM \u672c\u8d28\u4e0a\u662f\u6982\u7387\u6a21\u578b\uff0c\u5b83\u6ca1\u6709 \u201c\u8bed\u6cd5\u4e25\u683c\u6027\u201d \u7684\u6982\u5ff5\u3002\u867d\u7136\u9ad8\u7ea7\u6a21\u578b\u5df2\u7ecf\u5f88\u542c\u8bdd\u4e86\uff0c\u4f46\u5728\u9ad8\u5e76\u53d1\u6216\u957f\u6587\u672c\u5e72\u6270\u4e0b\uff0c\u4f9d\u7136\u4f1a\u53d1\u751f<strong>\u6307\u4ee4\u6f02\u79fb<\/strong>\u3002<\/p>\n\n\n\n<p><strong>\u751f\u4ea7\u7ea7\u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n\n\n\n<p><strong>1. \u4f7f\u7528 Pydantic Parser\uff1a<\/strong><\/p>\n\n\n\n<p>LangChain \u63d0\u4f9b\u4e86\u57fa\u4e8e Pydantic \u7684\u89e3\u6790\u5668\u3002\u5b83\u4e0d\u4ec5\u80fd\u5b9a\u4e49\u6570\u636e\u7ed3\u6784\uff0c\u8fd8\u81ea\u5e26\u81ea\u52a8\u4fee\u590d\u529f\u80fd\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u6a21\u578b\u8f93\u51fa\u7684 JSON \u683c\u5f0f\u9519\u4e86\uff0cLangChain \u4f1a\u81ea\u52a8\u628a\u9519\u8bef\u7684\u8f93\u51fa\u548c\u9519\u8bef\u4fe1\u606f\uff08Traceback\uff09\u518d\u53d1\u56de\u7ed9\u6a21\u578b\uff0c\u8bf4\uff1a\u201c\u4f60\u521a\u624d\u751f\u6210\u7684\u683c\u5f0f\u4e0d\u5bf9\uff0c\u62a5\u9519\u662f XXX\uff0c\u8bf7\u4fee\u6b63\u3002\u201d \u6a21\u578b\u901a\u5e38\u80fd\u81ea\u6211\u4fee\u6b63\u3002<\/p>\n\n\n\n<p><strong>2. Function Calling \/ Tool Use\uff08\u63a8\u8350\uff09\uff1a<\/strong><\/p>\n\n\n\n<p>\u4e0d\u8981\u8ba9\u6a21\u578b\u76f4\u63a5\u751f\u6210\u7eaf\u6587\u672c\u7684 JSON\u3002<\/p>\n\n\n\n<p>\u4f7f\u7528 OpenAI \u7684 Function Calling \u529f\u80fd\uff08LangChain \u4e2d\u5bf9\u5e94 <code>bind_tools<\/code> \u6216 <code>with_structured_output<\/code>\uff09\u3002\u8fd9\u662f\u5728 API \u5c42\u9762\u5f3a\u5236\u6a21\u578b\u8f93\u51fa\u7ed3\u6784\u5316\u6570\u636e\uff0c\u7a33\u5b9a\u6027\u6bd4\u7eaf Prompt \u7ea6\u675f\u9ad8\u4e00\u4e2a\u6570\u91cf\u7ea7\u3002<\/p>\n\n\n\n<p><strong>\u4ea7\u54c1\u7ecf\u7406\u51b3\u7b56\u70b9\uff1a<\/strong><\/p>\n\n\n\n<p>\u5728\u9a8c\u6536\u4ea7\u54c1\u65f6\uff0c\u5fc5\u987b\u8fdb\u884c\u538b\u529b\u6d4b\u8bd5\u3002\u8fde\u7eed\u8dd1 100 \u6b21\u7ed3\u6784\u5316\u63d0\u53d6\uff0c\u770b\u6210\u529f\u7387\u662f\u5426\u8fbe\u5230 99% \u4ee5\u4e0a\u3002\u5982\u679c\u8fbe\u4e0d\u5230\uff0c\u5c31\u8981\u8ba9\u5f00\u53d1\u6362 Function Calling \u65b9\u6848\u3002<\/p>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p><strong>\u5751\u4e94\uff1aLangChain \u7684\u62bd\u8c61\u6cc4\u6f0f\u4e0e\u7248\u672c\u5730\u72f1\ud83d\udd16<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u8fd9\u662f\u4e00\u4e2a\u504f\u5de5\u7a0b\u4f46\u6781\u5ea6\u5f71\u54cd\u4ea7\u54c1\u8fed\u4ee3\u7684\u5751\u3002<\/p>\n\n\n\n<p><strong>\u73b0\u8c61\u63cf\u8ff0\uff1a<\/strong><\/p>\n\n\n\n<p>\u5f00\u53d1\u544a\u8bc9\u4f60\uff1a\u201c\u8fd9\u4e2a\u529f\u80fd\u5f88\u96be\u6539\uff0c\u56e0\u4e3a LangChain \u5c01\u88c5\u5f97\u592a\u6df1\u4e86\u3002\u201d<\/p>\n\n\n\n<p>\u6216\u8005\uff1a\u201c\u6628\u5929\u8fd8\u80fd\u8dd1\u7684\u4ee3\u7801\uff0c\u4eca\u5929\u5347\u7ea7\u4e86 LangChain \u5c31\u62a5\u9519\u4e86\u3002\u201d<\/p>\n\n\n\n<p><strong>\u6839\u56e0\u5206\u6790\uff1a<\/strong><\/p>\n\n\n\n<p>LangChain \u662f\u4e00\u4e2a\u8fed\u4ee3\u6781\u5feb\uff08\u6709\u65f6\u5019\u4e00\u5929\u53d1\u597d\u51e0\u4e2a\u7248\u672c\uff09\u7684\u5f00\u6e90\u9879\u76ee\u3002<\/p>\n\n\n\n<p>\u5b83\u4e3a\u4e86\u6613\u7528\u6027\uff0c\u505a\u4e86\u6781\u9ad8\u5c42\u7684\u5c01\u88c5\uff08\u6bd4\u5982 <code>RetrievalQA<\/code> \u94fe\uff09\u3002\u8fd9\u5728 Demo \u9636\u6bb5\u597d\u7528\uff0c\u4f46\u5728\u751f\u4ea7\u9636\u6bb5\uff0c\u5982\u679c\u4f60\u60f3\u5fae\u8c03\u67d0\u4e2a\u73af\u8282\uff08\u6bd4\u5982\u60f3\u77e5\u9053\u4e2d\u95f4\u68c0\u7d22\u5230\u4e86\u4ec0\u4e48\u6587\u6863\uff0c\u6216\u8005\u60f3\u4fee\u6539\u4e2d\u95f4\u7684 Prompt\uff09\uff0c\u9ad8\u5c42\u5c01\u88c5\u53cd\u800c\u6210\u4e86\u9ed1\u76d2\uff08Black Box\uff09\uff0c\u8ba9\u8c03\u8bd5\u53d8\u5f97\u5f02\u5e38\u56f0\u96be\u3002<\/p>\n\n\n\n<p><strong>\u751f\u4ea7\u7ea7\u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n\n\n\n<p><strong>1. \u4f7f\u7528 LCEL\uff1a<\/strong><\/p>\n\n\n\n<p>\u6211\u5728\u7b2c\u4e00\u7bc7\u7b14\u8bb0\u91cc\u63d0\u5230\u7684 LCEL\uff0c\u4e0d\u4ec5\u4ec5\u662f\u8bed\u6cd5\u7cd6\uff0c\u5b83\u63d0\u4f9b\u4e86\u66f4\u597d\u7684\u900f\u660e\u5ea6\u3002\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\u90a3\u4e9b\u9ed1\u76d2\u7684\u3001\u5c01\u88c5\u597d\u7684 \u201cOld Chains\u201d\uff08\u5982 <code>ConversationChain<\/code>\uff09\uff0c\u800c\u662f\u7528 LCEL \u539f\u8bed\uff08Prompt | Model | Parser\uff09\u81ea\u5df1\u7ec4\u88c5\u3002<\/p>\n\n\n\n<p><strong>2. \u5f3a\u5236\u7248\u672c\u9501\u5b9a\uff1a<\/strong><\/p>\n\n\n\n<p>\u5728 <code>requirements.txt<\/code> \u91cc\uff0c\u5fc5\u987b\u9501\u6b7b LangChain \u7684\u7248\u672c\u53f7\uff08\u4f8b\u5982 <code>langchain==0.1.0<\/code>\uff09\u3002\u7edd\u5bf9\u4e0d\u8981\u5199 <code>langchain&gt;=0.1.0<\/code>\u3002\u5426\u5219\u67d0\u5929\u81ea\u52a8\u5347\u7ea7\u53ef\u80fd\u5bfc\u81f4\u6574\u4e2a\u7cfb\u7edf\u762b\u75ea\u3002<\/p>\n\n\n\n<p><strong>3. 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PM\uff0c\u4f60\u867d\u7136\u4e0d\u5199\u4ee3\u7801\uff0c\u4f46\u4f60\u8981\u8be2\u95ee\u5f00\u53d1\u56e2\u961f\uff1a\u201c\u6211\u4eec\u7684\u5e94\u7528\u53ef\u89c2\u6d4b\u6027\uff08Observability\uff09\u600e\u4e48\u505a\uff1f\u201d \u5982\u679c\u4ed6\u4eec\u8bf4 \u201c\u770b\u63a7\u5236\u53f0\u6253\u5370\u7684\u65e5\u5fd7\u201d\uff0c\u90a3\u662f\u8fdc\u8fdc\u4e0d\u591f\u7684\u3002<strong>\u5f3a\u70c8\u5efa\u8bae\u63a5\u5165 LangSmith \u6216\u7c7b\u4f3c\u7684 LLM Trace \u5de5\u5177\u3002<\/strong><\/p>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p><strong>\u516d\u3001\u603b\u7ed3\uff1a\u4ece\u73a9\u5177\u5230\u5de5\u5177\u7684\u8de8\u8d8a\ud83d\udd16<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u603b\u7ed3\u4e00\u4e0b\uff0c\u8981\u8de8\u8d8a Demo \u5230 Production \u7684\u9e3f\u6c9f\uff0c\u4f60\u9700\u8981\u5173\u6ce8\u8fd9 5 \u70b9\uff1a<\/p>\n\n\n\n<ol>\n<li><strong>\u7b97\u8d26<\/strong>\uff1a\u5f15\u5165 Token \u8ba1\u7b97\u4e0e\u9884\u8b66\uff0c\u522b\u8ba9\u516c\u53f8\u7834\u4ea7\u3002<\/li>\n\n\n\n<li><strong>\u4f53\u9a8c<\/strong>\uff1a\u5fc5\u987b\u4e0a\u6d41\u5f0f\u8f93\u51fa\uff08Streaming\uff09\uff0c\u522b\u8ba9\u7528\u6237\u5e72\u7b49\u3002<\/li>\n\n\n\n<li><strong>\u6570\u636e<\/strong>\uff1aRAG \u5fc5\u987b\u505a\u5207\u7247\u4f18\u5316\u548c\u91cd\u6392\u5e8f\uff08Rerank\uff09\uff0c\u522b\u4fe1\u8d56\u9ed8\u8ba4\u914d\u7f6e\u3002<\/li>\n\n\n\n<li><strong>\u7a33\u5b9a<\/strong>\uff1a\u7ed3\u6784\u5316\u8f93\u51fa\u4f18\u5148\u7528 Function Calling\uff0c\u522b\u6307\u671b Prompt \u80fd 100% \u7ba1\u4f4f\u6a21\u578b\u3002<\/li>\n\n\n\n<li><strong>\u76d1\u63a7<\/strong>\uff1a\u62d2\u7edd\u9ed1\u76d2\uff0c\u63a5\u5165 LangSmith\uff0c\u9501\u6b7b\u7248\u672c\u3002<\/li>\n<\/ol>\n\n\n\n<p>AI \u4ea7\u54c1\u7ecf\u7406\u7684\u6838\u5fc3\u7ade\u4e89\u529b\uff0c\u4e0d\u4ec5\u4ec5\u662f\u8bbe\u8ba1 Chatbot 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[&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48],"tags":[],"_links":{"self":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/20308"}],"collection":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=20308"}],"version-history":[{"count":7,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/20308\/revisions"}],"predecessor-version":[{"id":20351,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/20308\/revisions\/20351"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=20308"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=20308"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=20308"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}