Annoy (Approximate Nearest Neighbors Oh Yeah) is a C++ library with Python bindings to search for points in space that are close to a given query point. It also creates large read-only file-based data structures that are mapped into memory so that many processes may share the same data.

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Installation and Setup

pip install annoy

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Vectorstore

See a usage example. 
from langchain_community.vectorstores import Annoy