| # OpenSearch | |
| This page covers how to use the OpenSearch ecosystem within LangChain. | |
| It is broken into two parts: installation and setup, and then references to specific OpenSearch wrappers. | |
| ## Installation and Setup | |
| - Install the Python package with `pip install opensearch-py` | |
| ## Wrappers | |
| ### VectorStore | |
| There exists a wrapper around OpenSearch vector databases, allowing you to use it as a vectorstore | |
| for semantic search using approximate vector search powered by lucene, nmslib and faiss engines | |
| or using painless scripting and script scoring functions for bruteforce vector search. | |
| To import this vectorstore: | |
| ```python | |
| from langchain.vectorstores import OpenSearchVectorSearch | |
| ``` | |
| For a more detailed walkthrough of the OpenSearch wrapper, see [this notebook](../modules/indexes/vectorstore_examples/opensearch.ipynb) | |