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163ef35dd1
Updated titles into a consistent format. Fixed links to the diagrams. Fixed typos. Note: The Templates menu in the navbar is now sorted by the file names. I'll try sorting the navbar menus by the page titles, not the page file names.
79 lines
2.7 KiB
Markdown
79 lines
2.7 KiB
Markdown
# RAG - Chroma, Ollama, Gpt4all - private
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This template performs RAG with no reliance on external APIs.
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It utilizes `Ollama` the LLM, `GPT4All` for embeddings, and `Chroma` for the vectorstore.
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The vectorstore is created in `chain.py` and by default indexes a [popular blog posts on Agents](https://lilianweng.github.io/posts/2023-06-23-agent/) for question-answering.
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## Environment Setup
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To set up the environment, you need to download Ollama.
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Follow the instructions [here](https://python.langchain.com/docs/integrations/chat/ollama).
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You can choose the desired LLM with Ollama.
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This template uses `llama2:7b-chat`, which can be accessed using `ollama pull llama2:7b-chat`.
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There are many other options available [here](https://ollama.ai/library).
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This package also uses [GPT4All](https://python.langchain.com/docs/integrations/text_embedding/gpt4all) embeddings.
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## Usage
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To use this package, you should first have the LangChain CLI installed:
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```shell
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pip install -U langchain-cli
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```
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To create a new LangChain project and install this as the only package, you can do:
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```shell
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langchain app new my-app --package rag-chroma-private
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```
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If you want to add this to an existing project, you can just run:
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```shell
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langchain app add rag-chroma-private
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```
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And add the following code to your `server.py` file:
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```python
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from rag_chroma_private import chain as rag_chroma_private_chain
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add_routes(app, rag_chroma_private_chain, path="/rag-chroma-private")
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```
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(Optional) Let's now 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
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```shell
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export LANGCHAIN_TRACING_V2=true
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export LANGCHAIN_API_KEY=<your-api-key>
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export LANGCHAIN_PROJECT=<your-project> # if not specified, defaults to "default"
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```
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If you are inside this directory, then you can spin up a LangServe instance directly by:
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```shell
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langchain serve
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```
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This will start the FastAPI app with a server is running locally at
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[http://localhost:8000](http://localhost:8000)
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We can see all templates at [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs)
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We can access the playground at [http://127.0.0.1:8000/rag-chroma-private/playground](http://127.0.0.1:8000/rag-chroma-private/playground)
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We can access the template from code with:
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```python
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from langserve.client import RemoteRunnable
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runnable = RemoteRunnable("http://localhost:8000/rag-chroma-private")
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```
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The package will create and add documents to the vector database in `chain.py`. By default, it will load a popular blog post on agents. However, you can choose from a large number of document loaders [here](https://python.langchain.com/docs/integrations/document_loaders).
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