{"id":101618,"date":"2026-09-07T03:25:06","date_gmt":"2026-09-06T19:25:06","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/101618.html"},"modified":"2026-09-07T03:25:06","modified_gmt":"2026-09-06T19:25:06","slug":"%e5%a4%a7%e5%ad%a6%e7%94%9f%e5%b0%8f%e8%82%a0%e5%ad%a6%e4%b9%a0%ef%bc%9alangchain%e5%ae%8c%e6%95%b4%e7%9f%a5%e8%af%86%e7%82%b9%ef%bc%88%e6%99%ba%e8%83%bd%e4%bd%93%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/101618.html","title":{"rendered":"\u5927\u5b66\u751f\u5c0f\u80a0\u5b66\u4e60\uff1aLangChain\u5b8c\u6574\u77e5\u8bc6\u70b9\uff08\u667a\u80fd\u4f53\uff09"},"content":{"rendered":"

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u968f\u7740\u65f6\u4ee3\u7684\u53d1\u5c55，\u667a\u80fd\u4f53\u5df2\u7ecf\u9010\u6e10\u8fdb\u5165\u5230\u4e86\u6211\u4eec\u7684\u89c6\u91ce，\u53ea\u8981\u6211\u4eec\u7d27\u8ddf\u65f6\u4ee3\u6b65\u4f10，\u65e0\u8bba\u672a\u6765\u600e\u6837，\u76f8\u4fe1\u81ea\u5df1，\u4f60\u90fd\u4e0d\u4f1a\u5dee\u3002\u4eca\u5929\u5b66\u4e60\u4e86\u5b8c\u6574\u7684LangChain\u662f\u4ec0\u4e48？\u91cc\u9762\u5305\u62ec\u4e86\u4ec0\u4e48，\u4ee5\u53ca\u9879\u76ee\u4e2d\u5e94\u8be5\u600e\u4e48\u5e94\u7528，\u8fd8\u662f，\u5982\u679c\u54ea\u4e9b\u5730\u65b9\u6709\u95ee\u9898，\u5927\u5bb6\u4e00\u5b9a\u8981\u591a\u591a\u6307\u51fa\u7ea0\u6b63\u6211\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/p>\n

\u4e00.\u5927\u6a21\u578b<\/span><\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u5927\u6a21\u578b\u5206\u4e3a：\u516c\u5171\u5927\u6a21\u578b&\u79c1\u6709\u5927\u6a21\u578b<\/span><\/p>\n

\u516c\u7528\u5927\u6a21\u578b：\u4f8b\u5982deepseek\u00a0 \u8c46\u5305，\u6210\u672c\u4f4e，\u4e0d\u662f\u5f88\u5b89\u5168，\u957f\u671f\u4f7f\u7528\u6210\u672c\u4f1a\u53d8\u9ad8\u3002\u7533\u8bf7\u4e2a\u5bc6\u94a5\u5c31\u80fd\u7528，\u6309\u8c03\u7528\u91cf\u8ba1\u8d39，\u4e0d\u7528\u81ea\u5df1\u4e70\u663e\u5361，\u4e0a\u624b\u6700\u5feb\u3002<\/p>\n

\u79c1\u6709\u5927\u6a21\u578b：\u81ea\u5df1\u521b\u5efa\u7684\u6a21\u578b，\u6bd4\u8f83\u5b89\u5168\u3002\u7528Ollama\u8fd9\u4e2a\u5de5\u5177，\u628a\u5927\u6a21\u578b\u4e0b\u8f7d\u5230\u81ea\u5df1\u7535\u8111\/\u670d\u52a1\u671f\u4e0a，\u6570\u636e\u4e0d\u6d41\u51fa\u5185\u7f51，\u5b89\u5168\u6027\u9ad8；\u4f46\u9700\u8981\u663e\u5361\u786c\u4ef6，\u6210\u672c\u9ad8\u3002<\/p>\n

Ollama<\/span>:\u3000\u7b80\u5316\u5927\u6a21\u578b\u8bed\u8a00\u6a21\u578b（\u672c\u5730\u90e8\u7f72）+（\u8fd0\u884c\u8fc7\u7a0b）\u5f00\u6e90\u8f6f\u4ef6\u3002<\/p>\n

\"\"<\/p>\n

\u663e\u5361<\/span>\u662f\u4ec0\u4e48：\u5982\u679cCPU\u662f\u529e\u516c\u5ba4\u7684\u4e3b\u7ba1，\u64c5\u957f\u5904\u7406\u590d\u6742\u95ee\u9898，\u90a3\u663e\u5361\u597d\u6bd4\u4e00\u5927\u7fa4\u6d41\u6c34\u7ebf\u5de5\u4eba，\u64c5\u957f\u540c\u65f6\u5e72\u5927\u91cf\u91cd\u590d\u7b80\u5355\u7684\u5de5\u4f5c\u3002\u6700\u57fa\u7840\u7684\u662f\u753b\u9762\u8f93\u51fa，\u6211\u89c9\u5f97\u6211\u7684\u7535\u8111\u7684\u663e\u5361\u5e94\u8be5\u5f88\u4e00\u822c，\u56e0\u4e3a\u4e0d\u7ba1\u662f\u4e4b\u524d\u73a9\u6e38\u620f\u8fd8\u662f\u5236\u4f5c3D\u5efa\u6a21\u65f6\u611f\u89c9\u753b\u8d28\u90fd\u5f88\u4e00\u822c，AI\u8fd0\u7b97，\u6bd4\u5982\u5927\u6a21\u578b，\u672c\u5730AI\u7ed8\u56fe，RAG\u5411\u91cf\u8ba1\u7b97，\u9700\u8981\u6d77\u91cf\u6570\u636e\u8ba1\u7b97，\u9760\u7684\u662f\u663e\u5361\u8dd1\u3002<\/p>\n

openAI<\/span>\u662f\u4ec0\u4e48：\u662f\u4e00\u4e2a\u5927\u6a21\u578b，\u5236\u5b9aAPI\u89c4\u8303\u6210\u4e3a\u5927\u6a21\u578bAPI\u9ed8\u8ba4\u89c4\u8303，\u51e0\u4e4e\u5927\u6a21\u578b\u90fd\u517c\u5bb9openAI\u89c4\u8303\u3002<\/p>\n

\u5927\u6a21\u578bＡＰＩ：\u8bbf\u95ee\u6a21\u578b\u5bf9\u5916\u66b4\u9732\u7684API\u63a5\u53e3，\u5b9e\u73b0\u4e0e\u5927\u6a21\u578b\u7684\u4ea4\u4e92\u3002<\/p>\n<\/p>\n

\u4e8c.LangChain \u548cAgent\u5230\u5e95\u662f\u4ec0\u4e48\u5462？<\/span><\/h4>\n

LangChain:\u6211\u7684\u7406\u89e3\u5c31\u662f\u4e00\u4e2a\u5f00\u53d1\u667a\u80fd\u4f53\u7684\u5e73\u53f0（python，TypeScript）\u4f60\u662f\u5355\u4e00\u7684\u5e93，\u662f\u4e00\u6574\u5957\u3010\u667a\u80fd\u4f53\u5f00\u53d1\u5de5\u5177\u5168\u5bb6\u6876\u3011\u5176\u4e2d\u5206\u4e3a\u56db\u4e2a\u91cd\u8981\u90e8\u5206：<\/p>\n

LangChain：\u5feb\u901f\u642d\u5efa\u7b80\u5355\u667a\u80fd\u4f53\u539f\u578b<\/p>\n

LangGraph：\u7f16\u6392\u590d\u6742\u6d41\u7a0b，\u9002\u5408\u6709\u5206\u652f\u3001\u5faa\u73af\u3001\u72b6\u6001\u4fdd\u5b58\u7684\u4efb\u52a1<\/p>\n

Deep Agents：\u5904\u7406\u8d85\u957f\u3001\u591a\u6b65\u9aa4\u7684\u9ad8\u590d\u6742\u5ea6\u4efb\u52a1<\/p>\n

LangSmith：\u8c03\u8bd5\u3001\u6d4b\u8bd5\u3001\u8bc4\u4f30\u3001\u90e8\u7f72\u667a\u80fd\u4f53\u7684\u5e73\u53f0<\/p>\n<\/p>\n

\"\"<\/p>\n<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Agent：\u667a\u80fd\u4f53， agent = \u5927\u6a21\u578b+\u5de5\u5177 +\u8bb0\u5fc6<\/span><\/span>\u3002\u666e\u901a\u5927\u6a21\u578b\u53ea\u4f1a\u804a\u5929，Agent\u80fd\u81ea\u5df1\u5224\u65ad\u201c\u8981\u4e0d\u8981\u6267\u884c？\u201d\u81ea\u4e3b\u52a8\u8111\u5b50\u6765\u56de\u7b54\u4f60，\u5982\u679c\u9047\u5230\u590d\u6742\u60c5\u51b5\u8fd8\u4f1a\u8c03\u7528\u5de5\u5177，\u6700\u540e\u6574\u5408\u7b54\u6848\u7ed9\u4f60\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0pip install -U langchain<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0pip install -U langchain-openai<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0pip install -U langchain-deepseek<\/p>\n<\/p>\n

\u4e09. \u6a21\u578b\u521d\u59cb\u5316\u4e0e\u8c03\u7528<\/span><\/h4>\n

model\u7684\u521d\u59cb\u5316：init_chat_model<\/span> \u6839\u636e\u6a21\u578b\u7684\u540d\u79f0\u81ea\u52a8\u8bc6\u522b\u5382\u5546，\u81ea\u52a8\u8bfb\u53d6\u73af\u5883\u53d8\u91cf，\u4e00\u952e\u521b\u5efa\u5bf9\u8c61\u3002\u6362\u6a21\u578b\u53ea\u6362\u6a21\u578b\u540d\u5b57\u5373\u53ef\u3002\u8bb0\u5f97\u5728\u73af\u5883\u53d8\u91cf\u4e2d\u90e8\u7f72\u5927\u6a21\u578b\u7684ＡＰＩ\u54e6\u3002<\/p>\n

\u6a21\u578b\u53c2\u6570：<\/p>\n

1.temperature:\u63a7\u5236\u751f\u6210\u6587\u672c\u968f\u673a\u6027，\u503c\u8d8a\u5c0f\u8d8a\u51c6，\u8d8a\u5927\u8d8a\u53d1\u6563\u3002<\/p>\n

2.max_tokens：\u751f\u6210\u6587\u672c\u957f\u5ea6<\/p>\n

3.top_p:\u63a7\u5236\u751f\u6210\u6587\u672c\u591a\u6837\u6027，\u503c\u8d8a\u5c0f\u8d8a\u7a33\u5b9a\u3002<\/p>\n

4.timeout：\u63a5\u53e3\u8bf7\u6c42\u8d85\u65f6\u65f6\u95f4<\/p>\n

5.max_retries:\u8bf7\u6c42\u5931\u8d25\u91cd\u8bd5\u6b21\u6570（1~5）<\/p>\n<\/p>\n

\u8c03\u7528\u6a21\u578b\u7684\u5f62\u5f0f：<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 invoke\u963b\u585e\u5f0f：\u53d1\u5b8c\u8bf7\u6c42\u9700\u8981\u7b49\u5f85，\u6a21\u578b\u5168\u90e8\u751f\u6210\u5b8c\u5185\u5bb9\u4e00\u6b65\u8fd4\u56de，\u9002\u5408\u540e\u53f0\u5904\u7406\u6570\u636e\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 stream\u6d41\u5f0f\u8bbf\u95ee：\u6a21\u578b\u751f\u6210\u4e00\u4e2a\u5b57\u5c31\u8fd4\u56de\u4e00\u4e2a\u5b57，\u9002\u5408\u804a\u5929\u754c\u9762，\u7528\u6237\u611f\u4f53\u9a8c\u5f88\u597d\u3002<\/p>\n

\u5728Agent\u4e2d\u4f7f\u7528\u6a21\u578b：\u5f15\u7528create_agent \u5b8c\u6574\u4efb\u52a1\u6d41\u7a0b，\u6709\u8bb0\u5fc6，\u8fd4\u56de\u5b8c\u6574\u8fd0\u884c\u5feb\u7167\u3002<\/p>\n<\/p>\n

\u90a3\u6a21\u578b invoke \u8c03\u7528\u548c\u667a\u80fd\u4f53 invoke \u8c03\u7528\u6709\u4ec0\u4e48\u533a\u522b\u5462？<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6a21\u578b.invoke () \u662f\u76f4\u63a5\u8c03\u7528\u300c\u5927\u6a21\u578b\u672c\u8eab\u300d，\u5b83\u53ea\u8d1f\u8d23 \u201c\u751f\u6210\u6587\u672c\u201d；<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u667a\u80fd\u4f53.invoke () \u662f\u8c03\u7528\u300c\u4e00\u6574\u5957\u667a\u80fd\u7cfb\u7edf\u300d，\u5b83\u4f1a\u81ea\u5df1\u89c4\u5212\u3001\u8c03\u7528\u5de5\u5177\u3001\u67e5\u8d44\u6599，\u6700\u7ec8\u7ed9\u4f60\u5b8c\u6210\u4efb\u52a1\u3002<\/p>\n\n\u8c03\u7528\u65b9\u5f0f\u9002\u5408\u573a\u666f\u5178\u578b\u4f8b\u5b50<\/tr>\n\n\n\n
\u6a21\u578b.invoke ()<\/td>\n\u7b80\u5355\u3001\u5355\u6b65\u3001\u7eaf\u6587\u672c\u5904\u7406，\u4e0d\u9700\u8981\u5916\u90e8\u4fe1\u606f<\/td>\n\u7ffb\u8bd1\u3001\u6da6\u8272\u3001\u6587\u672c\u5206\u7c7b\u3001\u7b80\u5355\u6587\u6848\u751f\u6210<\/td>\n<\/tr>\n
\u667a\u80fd\u4f53.invoke ()<\/td>\n\u590d\u6742\u3001\u591a\u6b65\u9aa4\u3001\u9700\u8981\u5916\u90e8\u4fe1\u606f \/ \u5de5\u5177\u7684\u4efb\u52a1<\/td>\n\u5ba2\u670d\u95ee\u7b54\u3001\u6570\u636e\u5206\u6790\u3001\u4fe1\u606f\u68c0\u7d22\u3001\u4efb\u52a1\u89c4\u5212\u3001\u5de5\u5177\u8c03\u7528<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u56db.\u548c\u6a21\u578b\u6c9f\u901a\u7684\u4e09\u4ef6\u5957：\u6d88\u606f，\u63d0\u793a\u8bcd，\u8f93\u51fa\u89e3\u6790<\/span><\/h4>\n

\u6d88\u606f（Message）<\/span>:\u672c\u8d28\u5c31\u662f\u7ed9\u5927\u6a21\u578b\u53d1\u6d88\u606f，\u5927\u6a21\u578b\u8fd4\u56de\u6d88\u606f，\u5e76\u4e0d\u662f\u7eaf\u6587\u672c，\u662f\u9700\u8981\u5206\u89d2\u8272\u7684：\u7cfb\u7edf\u63d0\u793a，\u7528\u6237\u8f93\u5165，AI\u56de\u590d\u3002LangChain\u90fd\u5c01\u88c5\u6210\u4e86\u5bf9\u8c61，\u4e0d\u7528\u81ea\u5df1\u5199\u5b57\u5178\u3002\u8fd8\u652f\u6301\u53d1\u9001\u7167\u7247（\u672c\u5730\u56fe\u7247\u88c5\u6210base64）<\/p>\n

base64：\u901a\u7528\u7f16\u7801\u4ece\u4e8c\u8fdb\u5236\u6362\u6210\u7eaf\u6587\u672c<\/p>\n

\u63d0\u793a\u8bcd（prompt）<\/span>：\u53d1\u9001\u7ed9\u6a21\u578b\u7684\u6307\u4ee4\u3002\u60f3\u8981\u6709\u7a33\u5b9a\u7684\u8f93\u51fa，\u4e00\u5b9a\u8981\u4f1a\u5199\u63d0\u793a\u8bcd<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u63d0\u793a\u8bcd\u6a21\u677f = \u8eab\u4efd + \u6307\u4ee4 + \u6837\u4f8b +\u4e0a\u4e0b\u6587\u3000<\/span><\/p>\n

\u8f93\u51fa\u89e3\u6790\u5668（OutputParser）<\/span>：\u6a21\u578b\u9ed8\u8ba4\u8fd4\u56de\u81ea\u7136\u8bed\u8a00，\u7a0b\u5e8f\u4e0d\u597d\u5904\u7406\u3002\u89e3\u6790\u5668\u5c31\u662f\u628a\u8f93\u51fa\u8f6c\u6210\u7a0b\u5e8f\u80fd\u7528\u7684\u683c\u5f0f：<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7eaf\u6587\u672c\u89e3\u6790\u5668：\u53ea\u63d0\u53d6\u6587\u5b57，\u53bb\u6389\u591a\u4f59\u5305\u88c5<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0JSON \u89e3\u6790\u5668：\u81ea\u52a8\u8f6c\u6210 Python \u5b57\u5178<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Pydantic \u89e3\u6790\u5668：\u4f01\u4e1a\u6700\u5e38\u7528，\u5f3a\u7c7b\u578b\u6821\u9a8c，\u5b57\u6bb5\u9519\u4e86\u76f4\u63a5\u62a5\u9519，\u9002\u5408\u590d\u6742\u4e1a\u52a1\u573a\u666f\u3002<\/p>\n<\/p>\n

\u4e94．\u5de5\u5177<\/span><\/h4>\n

\u5de5\u5177\u5c31\u662f\u7ed9\u667a\u80fd\u4f53\u88c5\u4e0a\u4e86\u624b\u811a，\u5982\u679c\u6a21\u578b\u662f\u5927\u8111\u7684\u8bdd，\u90a3\u4e48\u5de5\u5177\u4e00\u5b9a\u662f\u8eaf\u5e72\u54c8\u54c8\u54c8\u3002<\/p>\n

\u5de5\u5177\u5206\u4e3a\u81ea\u5b9a\u4e49\u5de5\u5177\u548c\u7b2c\u4e09\u65b9\u5de5\u5177：<\/p>\n

\u81ea\u5b9a\u4e49\u5de5\u5177：\u5199\u4e2a\u666e\u901a\u7684\u53c2\u6570\u3000＋ @Tool \u88c5\u9970\u5668\u5c31\u884c\u3002\u6a21\u578b\u4f1a\u81ea\u5df1\u5224\u65ad\u4ec0\u4e48\u65f6\u5019\u8c03\u7528\u4ec0\u4e48\u3002\u6ce8\u610f：config\u548cruntime\u662f\u4fdd\u7559\u53c2\u6570\u540d，\u4e0d\u80fd\u81ea\u5df1\u5b9a\u4e49\u3002<\/p>\n

\u7b2c\u4e09\u65b9\u5de5\u5177：LangChain\u5185\u7f6e\u4e86\u4e00\u5927\u5806\u73b0\u6210\u7684\u5de5\u5177，\u6bd4\u5982\u8bf4Tavily\u7f51\u9875\u641c\u7d22，Agent\u9047\u5230\u4e0d\u77e5\u9053\u7684\u4e8b\u4f1a\u81ea\u5df1\u5168\u7f51\u641c\u7d22，\u4e0d\u7528\u4f60\u5199\u722c\u866b\u3002<\/p>\n<\/p>\n

\u516d.\u3000\u8bb0\u5fc6<\/span><\/h4>\n

\u8bb0\u5fc6\u5206\u4e3a\u77ed\u671f\u8bb0\u5fc6\u548c\u957f\u671f\u8bb0\u5fc6： \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u77ed\u671f\u8bb0\u5fc6：\u5f53\u524d\u4f1a\u8bdd\u8bb0\u4f4f\u00a0 \u4e00\u822c\u5b58\u5728\u5185\u5b58 redis\u4e2d，\u7a0b\u5e8f\u5173\u4e86\u5c31\u6ca1\u4e86，\u9002\u5408\u5f00\u53d1\u6d4b\u8bd5\u3002\u7528InMemorySaver<\/span><\/span>\u5b9e\u73b0，\u9760thread_id<\/span><\/span>\u533a\u5206\u4e0d\u540c\u4eba\u7684\u5bf9\u8bdd\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u957f\u671f\u8bb0\u5fc6：\u5b58\u5728\u6570\u636e\u5e93\u91cc（\u6bd4\u5982 SQLite），\u7a0b\u5e8f\u91cd\u542f\u4e5f\u8fd8\u5728，\u9002\u5408\u6b63\u5f0f\u4ea7\u54c1\u3002\u540c\u4e00\u4e2athread_id<\/span>\u4e0b\u6b21\u6253\u5f00\u8fd8\u80fd\u63a5\u7740\u804a\u3002<\/p>\n<\/p>\n

\u90a3\u4e48\u6700\u91cd\u8981\u7684\u662f\u4ec0\u4e48？\u5c31\u662f\u4e0d\u8ba9\u667a\u80fd\u4f53\u80e1\u8bf4\u516b\u9053\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898：RAG<\/span><\/p>\n<\/p>\n

\u4e03. RAG\u662f\u4ec0\u4e48？<\/span><\/h4>\n

\u5927\u6a21\u578b\u6709\u4e24\u4e2a\u6838\u5fc3\u75db\u70b9：\u5e7b\u89c9+ \u77e5\u8bc6\u65f6\u6548\u6027\u4e0d\u8db3<\/span>（\u4e5f\u5c31\u662f\u8bf4\u5047\u8bdd+\u77e5\u8bc6\u8001\u65e7）<\/p>\n

\u89e3\u51b3\u65b9\u6848：\u5fae\u8c03\/ RAG<\/span><\/p>\n

\u5fae\u8c03：\u5728\u9884\u8bad\u7ec3\u5927\u6a21\u578b\u57fa\u7840\u4e0a，\u7528\u9886\u57df\u4e13\u5c5e\u6570\u636e\u8fdb\u4e00\u6b65\u8bad\u7ec3，\u8ba9\u5927\u6a21\u578b\u5185\u5316\u4e13\u4e1a\u77e5\u8bc6\u3002\u5c31\u662f\u8ba9\u77e5\u8bc6\u8bb0\u4f4f，\u6210\u672c\u9ad8，\u5468\u671f\u957f，\u66f4\u65b0\u9ebb\u70e6\u3002<\/span><\/span><\/p>\n

RAG:\u68c0\u7d22\u589e\u5f3a\u751f\u6210，\u751f\u6210\u524d\u5148\u4ece\u5916\u90e8\u77e5\u8bc6\u5e93（\u6587\u6863\/\u6570\u636e\u5e93\/\u7f51\u9875）\u68c0\u7d22\u76f8\u5173\u4e8b\u5b9e\u3002\u5c06\u68c0\u7d22\u7ed3\u679c\u4e0e\u7528\u6237\u95ee\u9898\u4e00\u540c\u8f93\u5165\u6a21\u578b\u3002\u5c31\u662f\u6a21\u578b\u5148\u53bb\u77e5\u8bc6\u5e93\u641c\u7d22\u76f8\u5173\u5185\u5bb9，\u518d\u6839\u636e\u641c\u5230\u7684\u5185\u5bb9\u751f\u6210\u7b54\u6848\u3002\u6210\u672c\u4f4e，\u66f4\u65b0\u65b9\u4fbf，\u8fd8\u80fd\u6eaf\u6e90\u7b54\u6848\u6765\u6e90，\u662f\u73b0\u5728\u7684\u4e3b\u6d41\u65b9\u6848\u3002<\/span><\/span><\/p>\n<\/p>\n

RAG \u5206\u4e24\u5927\u6b65：<\/p>\n

\u79bb\u7ebf\u5efa\u5e93：\u628a\u6587\u6863（PDF\u3001Word\u3001TXT \u7b49）\u8bfb\u8fdb\u6765\u2192\u5207\u6210\u5c0f\u5757\u2192\u8f6c\u6210\u5411\u91cf\u2192\u5b58\u5230\u5411\u91cf\u6570\u636e\u5e93，\u505a\u597d\u7d22\u5f15\u3002<\/p>\n

\u5728\u7ebf\u95ee\u7b54：\u7528\u6237\u63d0\u95ee\u2192\u628a\u95ee\u9898\u4e5f\u8f6c\u6210\u5411\u91cf\u2192\u53bb\u5411\u91cf\u5e93\u641c\u6700\u76f8\u4f3c\u7684\u51e0\u6bb5\u6587\u5b57\u2192\u628a\u95ee\u9898 + \u641c\u5230\u7684\u8d44\u6599\u4e00\u8d77\u53d1\u7ed9\u5927\u6a21\u578b\u2192\u6a21\u578b\u6839\u636e\u8d44\u6599\u751f\u6210\u7b54\u6848\u3002<\/p>\n<\/p>\n

\"\"<\/p>\n<\/p>\n

\u516b.\u94fe\u5f0f\u8c03\u7528（LCEL）<\/span><\/h4>\n

\u628a\u7ec4\u4ef6\u4e32\u6210\u6d41\u6c34\u7ebf，\u8ba9\u6211\u611f\u89c9\u5f88\u50cfjava\u4e2d\u7684\u6d41\u3002<\/p>\n

\u6838\u5fc3\u903b\u8f91\u5c31\u662f\u94fe\u5f0f\u8c03\u7528\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0eg: chain = prompt | LLM | parser<\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u63d0\u793a\u8bcd\u6a21\u677f|\u5927\u6a21\u578b|\u8f93\u51fa\u89e3\u6790\u5668<\/span><\/p>\n

\u7528\u3000|\u3000\u7b26\u53f7\u628a\u63d0\u793a\u8bcd\u6a21\u677f，\u5927\u6a21\u578b，\u8f93\u51fa\u89e3\u6790\u5668\u4e32\u8d77\u6765，\u50cf\u6d41\u6c34\u7ebf\u4e00\u6837\u81ea\u52a8\u4f20\u53c2\u3002<\/p>\n

\u53ea\u8981\u4f60\u4f20\u4f60\u6700\u5f00\u59cb\u7684\u53d8\u91cf，\u5b83\u4f1a\u81ea\u52a8\u4e00\u6b65\u5904\u7406，\u6700\u540e\u8fd4\u56de\u4f60\u60f3\u8981\u7684\u7ed3\u679c\u3002<\/p>\n

\u652f\u6301\u7684\u8c03\u7528\u65b9\u5f0f*3:<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u540c\u6b65\u8c03\u7528：invoke\u00a0<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6d41\u5f0f\u8f93\u51fa：stream<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6279\u91cf\u5904\u7406：batch<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0（\u5fc5\u987b\u5b9e\u73b0\u7edf\u4e00\u89c4\u8303：Runnable\u63a5\u53e3）<\/p>\n

\"\"<\/p>\n<\/p>\n

\u4e5d.\u00a0RAG \u56db\u6b65\u8d70：\u52a0\u8f7d\u2192\u62c6\u5206\u2192\u5411\u91cf\u5316\u2192\u5b58\u5e93<\/span><\/h4>\n

1.\u6587\u6863\u52a0\u8f7d\u5668<\/span>：\u8d1f\u8d23\u628a\u5404\u79cd\u683c\u5f0f\u7684\u6587\u4ef6\u8bfb\u6210 LangChain \u7edf\u4e00\u7684Document\u683c\u5f0f\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5e38\u7528\u7684：\u00a0 \u8bfb TXT \u7684TextLoader\u3001<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u8bfb PDF \u7684PyPDFLoader\u3001<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u00a0\u8bfb Markdown \u7684UnstructuredMarkdownLoader<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8bfb CSV \u7684CSVLoader\u3002<\/p>\n<\/p>\n

2.\u6587\u672c\u5206\u5272\u5668<\/span>：\u56e0\u4e3a\u5927\u6a21\u578b\u4e0a\u4e0b\u6587\u957f\u5ea6\u4f18\u5148，\u800c\u4e14\u6574\u6bb5\u6587\u6863\u68c0\u7d22\u4e0d\u51c6\u3002\u5207\u6210\u5c0f\u5757\u540e，\u6280\u80fd\u653e\u8fdb\u4e0a\u4e0b\u6587，\u53c8\u80fd\u7cbe\u51c6\u5339\u914d\u8bed\u4e49\u3002<\/p>\n

CharacterTextSplitter：\u6309\u56fa\u5b9a\u5b57\u7b26\u6570\u786c\u5207，\u7b80\u5355\u7c97\u66b4，\u5bb9\u6613\u628a\u4e00\u53e5\u8bdd\u5207\u4e24\u534a，\u9002\u5408\u7eaf\u6587\u672c\u65e5\u5fd7\u3002<\/p>\n

RecursiveCharacterTextSplitter：\u6700\u5e38\u7528，\u5206\u5c42\u5207\u5272，\u4f18\u5148\u6309\u6bb5\u843d\u3001\u518d\u6309\u53e5\u5b50\u3001\u518d\u6309\u8bcd，\u5c3d\u91cf\u4e0d\u7834\u574f\u8bed\u4e49，\u9002\u5408\u7edd\u5927\u591a\u6570\u6587\u6863\u3002<\/p>\n<\/p>\n

3.\u5d4c\u5165\u6a21\u578b<\/span>：\u628a\u6587\u5b57\u8f6c\u6362\u6210\u4e00\u4e32\u6570\u5b57（\u5411\u91cf），\u8bed\u4e49\u76f8\u8fd1\u7684\u6587\u5b57，\u5411\u91cf\u8ddd\u79bb\u5c31\u8fd1\u3002<\/p>\n

\u53ef\u4ee5\u7528\u963f\u91cc\u4e91\u767e\u70bc\u7684\u5728\u7ebf\u5d4c\u5165 API，\u65b9\u4fbf\u7a33\u5b9a\u3002<\/p>\n

\u4e5f\u53ef\u4ee5\u7528\u672c\u5730\u5f00\u6e90\u7684bge-m3\u6a21\u578b，\u7528 Ollama \u8dd1，\u514d\u8d39\u3001\u6570\u636e\u4e0d\u51fa\u53bb，\u6548\u679c\u5f88\u597d，\u662f\u73b0\u5728\u4e3b\u6d41\u7684\u5f00\u6e90\u9009\u62e9\u3002<\/p>\n<\/p>\n

4.\u5411\u91cf\u6570\u636e\u5e93<\/span><\/p>\n

\u6587\u672c\u5411\u91cf\u5b58\u50a8：\u6587\u672c\u5d4c\u5165\u5411\u91cf = \u5411\u91cf\u5b58\u50a8 +\u8bed\u4e49\u76f8\u4f3c\u6027\u68c0\u7d22\u3000（\u6838\u5fc3：\u8bed\u4e49\u76f8\u4f3c\u6027\u68c0\u7d22）<\/p>\n

\u5165\u95e8\u63a8\u8350Chroma：\u8f7b\u91cf\u3001\u672c\u5730\u6587\u4ef6\u5b58\u50a8，\u4e0d\u7528\u88c5\u670d\u52a1，\u5f00\u7bb1\u5373\u7528\u3002<\/p>\n

\u751f\u4ea7\u73af\u5883\u5e38\u7528 Milvus\u3001Pinecone\u3001Redis \u5411\u91cf\u68c0\u7d22\u7b49\u3002<\/p>\n<\/p>\n

５.\u68c0\u7d22\u5668<\/span>：\u5c06\u6587\u6863\u5b58\u5165\u5411\u91cf\u6570\u636e\u5e93\u4e2d，\u6267\u884c\u8bed\u4e49\u68c0\u7d22，\u4ece\u77e5\u8bc6\u5e93\u4e2d\u5339\u914d\u4e0e\u7528\u6237\u95ee\u9898\u6700\u76f8\u5173\u7684\u6587\u672c\u7247\u6bb5\u3002\u3000\u529f\u80fd\u662f：\u4ece\u672c\u5730\u5411\u91cf\u5e93\u52a0\u8f7d\u5df2\u5b58\u50a8\u7684\u6587\u6863\u6570\u636e，\u6267\u884c\u76f8\u4f3c\u5ea6\u68c0\u7d22，\u652f\u6301\u8bbe\u7f6e\u8fd4\u56de\u6761\u6570\u3002\u652f\u6301\u76f8\u5173\u8bc4\u5206\u3002<\/p>\n<\/p>\n

\"\"<\/p>\n<\/p>\n

\u597d\u5566，\u7ec8\u4e8e\u6574\u7406\u5b8c\u4e86，\u77e5\u8bc6\u597d\u591a，\u5e0c\u671b\u77e5\u8bc6\u90fd\u80fd\u81ea\u52a8\u5438\u5165\u5927\u8111，\u597d\u4e86\u5927\u5bb6\u62dc\u62dc～<\/p>\n<\/p>\n

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－<\/p>\n<\/p>\n<\/p>\n

  • \u5927\u6a21\u578b\u5bf9\u63a5：\u516c\u6709 API（\u4f4e\u6210\u672c\u5feb\u4e0a\u624b）\/ \u672c\u5730 Ollama（\u9ad8\u9690\u79c1\u9700\u786c\u4ef6），API \u666e\u904d\u517c\u5bb9 OpenAI \u683c\u5f0f\u3002<\/li>\n
  • LangChain \u56db\u5927\u4ef6：LangChain（\u5feb\u901f\u539f\u578b）\u3001LangGraph（\u6d41\u7a0b\u7f16\u6392）\u3001Deep Agents（\u590d\u6742\u4efb\u52a1）\u3001LangSmith（\u8c03\u8bd5\u90e8\u7f72）\u3002<\/li>\n
  • Agent = \u5927\u6a21\u578b + \u5de5\u5177 + \u8bb0\u5fc6，\u81ea\u4e3b\u89c4\u5212\u8c03\u7528\u5de5\u5177\u5b8c\u6210\u4efb\u52a1\u3002<\/li>\n
  • \u6a21\u578b\u8c03\u7528：init_chat_model\u4e00\u952e\u521d\u59cb\u5316；invoke\u963b\u585e\u8fd4\u56de，stream\u6d41\u5f0f\u8f93\u51fa\u3002<\/li>\n
  • \u6d88\u606f\u56db\u89d2\u8272：system（\u8eab\u4efd\u6307\u4ee4）\u3001human（\u7528\u6237\u8f93\u5165）\u3001ai（\u6a21\u578b\u56de\u590d）\u3001tool（\u5de5\u5177\u7ed3\u679c）\u3002<\/li>\n
  • \u63d0\u793a\u8bcd\u56db\u8981\u7d20：\u8eab\u4efd\u3001\u6307\u4ee4\u3001\u6837\u4f8b\u3001\u4e0a\u4e0b\u6587；\u7528\u6a21\u677f\u590d\u7528，\u907f\u514d\u91cd\u590d\u7f16\u5199\u3002<\/li>\n
  • \u8f93\u51fa\u89e3\u6790\u5668：Str（\u7eaf\u6587\u672c）\u3001Json（\u5b57\u5178）\u3001Pydantic（\u5f3a\u7c7b\u578b\u6821\u9a8c，\u4f01\u4e1a\u9996\u9009）\u3002<\/li>\n
  • \u5de5\u5177\u5b9a\u4e49：\u51fd\u6570\u52a0@tool\u88c5\u9970\u5668，\u53c2\u6570\u52a0\u7c7b\u578b\u6ce8\u89e3；\u7981\u7528config\/runtime\u53c2\u6570\u540d\u3002<\/li>\n
  • \u8bb0\u5fc6\u5206\u7c7b：\u77ed\u671f（\u5185\u5b58 InMemorySaver）\u3001\u957f\u671f（\u6570\u636e\u5e93 SqliteSaver）；\u9760thread_id\u6807\u8bc6\u4f1a\u8bdd\u3002<\/li>\n
  • RAG \u89e3\u51b3：\u5e7b\u89c9\u3001\u77e5\u8bc6\u8fc7\u65f6；\u65e0\u9700\u5fae\u8c03，\u5916\u6302\u77e5\u8bc6\u5e93，\u6210\u672c\u4f4e\u53ef\u6eaf\u6e90\u3002<\/li>\n
  • RAG \u4e24\u9636\u6bb5：\u79bb\u7ebf\u5efa\u5e93（\u52a0\u8f7d\u2192\u62c6\u5206\u2192\u5411\u91cf\u5316\u2192\u5b58\u5e93）；\u5728\u7ebf\u68c0\u7d22（\u95ee\u9898\u5411\u91cf\u5316\u2192\u5339\u914d\u2192\u7ec4\u63d0\u793a\u2192\u751f\u6210）\u3002<\/li>\n
  • LCEL \u94fe\u5f0f\u8c03\u7528：A | B | C\u7ba1\u9053\u5f0f\u4e32\u8054，\u81ea\u52a8\u4f20\u53c2；\u652f\u6301 invoke\/stream\/batch \u4e09\u79cd\u8c03\u7528\u3002<\/li>\n
  • \u6587\u6863\u52a0\u8f7d：\u7edf\u4e00\u8f6c Document \u5bf9\u8c61；\u5e38\u7528 Text\/PyPDF\/Markdown\/CSV \u52a0\u8f7d\u5668；Docling \u89e3\u6790\u5f3a\u4f46\u66f4\u91cd\u3002<\/li>\n
  • \u6587\u672c\u62c6\u5206：\u4f18\u5148\u7528 RecursiveCharacterTextSplitter，\u5206\u5c42\u8bed\u4e49\u5207\u5272，chunk_size+chunk_overlap\u63a7\u5236\u5927\u5c0f\u548c\u91cd\u53e0\u3002<\/li>\n
  • \u5d4c\u5165\u6a21\u578b：\u6587\u672c\u8f6c\u5411\u91cf，\u7528\u4e8e\u8bed\u4e49\u5339\u914d；\u5728\u7ebf\u7528\u767e\u70bc，\u672c\u5730\u63a8\u8350 bge-m3（Ollama \u90e8\u7f72）\u3002<\/li>\n
  • \u5411\u91cf\u5e93：\u5165\u95e8\u7528 Chroma（\u672c\u5730\u8f7b\u91cf）；\u751f\u4ea7\u7528 Milvus\/Pinecone \u7b49；\u652f\u6301\u76f8\u4f3c\u5ea6\u68c0\u7d22 + \u8bc4\u5206\u3002<\/li>\n
  • \u9879\u76ee\u843d\u5730：RAG \u68c0\u7d22\u5de5\u5177 + Agent \u8bb0\u5fc6 + \u6d41\u5f0f\u8f93\u51fa + FastAPI \u63a5\u53e3 = \u5b8c\u6574\u667a\u80fd\u95ee\u7b54\u7cfb\u7edf\u3002<\/li><\/p>\n","protected":false},"excerpt":{"rendered":"

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