langchain/templates/rag-pinecone-multi-query/README.md
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# RAG - Pinecone - multi-query
This template performs RAG using `Pinecone` and `OpenAI` with a multi-query retriever.
It uses an LLM to generate multiple queries from different perspectives based on the user's input query.
For each query, it retrieves a set of relevant documents and takes the unique union across all queries for answer synthesis.
## Environment Setup
This template uses Pinecone as a vectorstore and requires that `PINECONE_API_KEY`, `PINECONE_ENVIRONMENT`, and `PINECONE_INDEX` are set.
Set the `OPENAI_API_KEY` environment variable to access the OpenAI models.
## Usage
To use this package, you should first install the LangChain CLI:
```shell
pip install -U langchain-cli
```
To create a new LangChain project and install this package, do:
```shell
langchain app new my-app --package rag-pinecone-multi-query
```
To add this package to an existing project, run:
```shell
langchain app add rag-pinecone-multi-query
```
And add the following code to your `server.py` file:
```python
from rag_pinecone_multi_query import chain as rag_pinecone_multi_query_chain
add_routes(app, rag_pinecone_multi_query_chain, path="/rag-pinecone-multi-query")
```
(Optional) Now, let's configure LangSmith. LangSmith will help us trace, monitor, and debug LangChain applications. You can sign up for LangSmith [here](https://smith.langchain.com/). If you don't have access, you can skip this section
```shell
export LANGCHAIN_TRACING_V2=true
export LANGCHAIN_API_KEY=<your-api-key>
export LANGCHAIN_PROJECT=<your-project> # if not specified, defaults to "default"
```
If you are inside this directory, then you can spin up a LangServe instance directly by:
```shell
langchain serve
```
This will start the FastAPI app with a server running locally at [http://localhost:8000](http://localhost:8000)
You can see all templates at [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs)
You can access the playground at [http://127.0.0.1:8000/rag-pinecone-multi-query/playground](http://127.0.0.1:8000/rag-pinecone-multi-query/playground)
To access the template from code, use:
```python
from langserve.client import RemoteRunnable
runnable = RemoteRunnable("http://localhost:8000/rag-pinecone-multi-query")
```