Unverified90% confidenceFactTime unknown
LangChain的ExampleSelector常用实现包括SemanticSimilarityExampleSelector（基于向量数据库检索最相似示例）和LengthBasedExampleSelector（根据Token预算动态调整示例数量）
1
Sources
90%
Confidence
Long-term
Relevance
6/3/2026
First Seen
Sources
LangChain少样本提示词模板实战：FewShotPromptTemplate完整教程
bilibili老陈说编程
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