docs ecosystem/integrations update 4 (#5590)

# docs `ecosystem/integrations` update 4

Added missed integrations. Fixed inconsistencies. 

## Who can review?

@hwchase17 
@dev2049
This commit is contained in:
Leonid Ganeline
2023-06-03 15:29:03 -07:00
committed by GitHub
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commit b201cfaa0f
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# 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](../modules/indexes/vectorstores/examples/annoy.ipynb).
```python
from langchain.vectorstores import Annoy
```