_cosine_relevance_score_fn() — langchain Function Reference

Architecture documentation for the _cosine_relevance_score_fn() function in vectorstores.py from the langchain codebase.

Function python LangChainCore MessageInterface

Entity Profile

LangChainCore→ MessageInterface→ _cosine_relevance_score_fn() — langchain Function Reference

Dependency Diagram

graph TD
  514dd4ec_9efc_d335_325f_bbb1d4ba63ec["_cosine_relevance_score_fn()"]
  2d095452_70a7_4606_a1b1_4650d16b5343["Qdrant"]
  514dd4ec_9efc_d335_325f_bbb1d4ba63ec -->|defined in| 2d095452_70a7_4606_a1b1_4650d16b5343
  style 514dd4ec_9efc_d335_325f_bbb1d4ba63ec fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/partners/qdrant/langchain_qdrant/vectorstores.py lines 1946–1948

    def _cosine_relevance_score_fn(distance: float) -> float:
        """Normalize the distance to a score on a scale [0, 1]."""
        return (distance + 1.0) / 2.0