utils

Various Utility Functions

• Tools for handling bson.ObjectId

The help IDs live as ObjectId in MongoDB and str in Langchain and JSON.

• Tools for the Maximal Marginal Relevance (MMR) reranking

These are duplicated from langchain_community to avoid cross-dependencies.

Functions “maximal_marginal_relevance” and “cosine_similarity” are duplicated in this utility respectively from modules:

• “libs/community/langchain_community/vectorstores/utils.py”

• “libs/community/langchain_community/utils/math.py”

Functions

utils.cosine_similarity(X, Y)	Row-wise cosine similarity between two equal-width matrices.
utils.make_serializable(obj)	Recursively cast values in a dict to a form able to json.dump
utils.maximal_marginal_relevance(...[, ...])	Compute Maximal Marginal Relevance (MMR).
utils.oid_to_str(oid)	Convert MongoDB's internal BSON ObjectId into a simple str for compatibility.
utils.str_to_oid(str_repr)	Attempt to cast string representation of id to MongoDB's internal BSON ObjectId.