langchain/docs/extras/ecosystem/integrations/annoy.mdx

# Annoy

> [Annoy](https://github.com/spotify/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 mmapped into memory so that many processes may share the same data. 
## Installation and Setup


```bash
pip install annoy
```


## Vectorstore

See a [usage example](/docs/modules/data_connection/vectorstores/integrations/annoy.html).

```python
from langchain.vectorstores import Annoy
```