langchain_community.vectorstores.utils.maximal_marginal_relevance¶
- langchain_community.vectorstores.utils.maximal_marginal_relevance(query_embedding: ndarray, embedding_list: list, lambda_mult: float = 0.5, k: int = 4) List[int][source]¶
Calculate maximal marginal relevance.
- Parameters
query_embedding (ndarray) –
embedding_list (list) –
lambda_mult (float) –
k (int) –
- Return type
List[int]