
LangExtract实战指南:2025企业级数据提取方案 | Geoz.com.cn
LangExtract is Google's official open-source Python library designed for extracting structured data (JSON, Pydantic objects) from text, PDFs, and invoices. Unlike standard prompt engineering, it's built for enterprise-grade extraction with three core advantages: precise grounding (mapping fields to source coordinates), schema enforcement (ensuring output matches Pydantic definitions), and model agnosticism (compatible with Gemini, DeepSeek, OpenAI, and LlamaIndex). This guide provides practical insights for Chinese developers on local configuration, cost optimization, and handling long documents. LangExtract是Google官方开源的Python库,专为从文本、PDF和发票中提取结构化数据(JSON、Pydantic对象)而设计。与普通Prompt工程不同,它为企业级数据提取打造,具备三大核心优势:精准溯源(字段可映射回原文坐标)、Schema强约束(保证输出符合数据结构)、模型无关性(兼容Gemini、DeepSeek、OpenAI及LlamaIndex)。本指南基于真实项目经验,涵盖国内环境配置、API成本优化和长文档处理技巧。
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