Unverified50% confidenceSolutionExact time
使用.env文件而非硬编码密钥是工程实践中的基本安全规范，代码中通过dotenv加载.env文件读取环境变量
1
Sources
50%
Confidence
Long-term
Relevance
7/12/2026
First Seen
Sources
Getting Started with LangChain: LLM Invocation, Agent Practice, and Environment Setup Guide
bilibiliAI大模型小将7/10/2026
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