🦜️🔗 LangChain 🤝 Streamlit agent examples

This repository contains reference implementations of various LangChain agents as Streamlit apps including:

• basic_streaming.py: Simple streaming app with langchain.chat_models.ChatOpenAI (View the app)
• basic_memory.py: Simple app using StreamlitChatMessageHistory for LLM conversation memory (View the app)
• mrkl_demo.py: An agent that replicates the MRKL demo (View the app)
• minimal_agent.py: A minimal agent with search (requires setting OPENAI_API_KEY env to run)
• search_and_chat.py: A search-enabled chatbot that remembers chat history (View the app)
• simple_feedback.py: A chat app that allows the user to add feedback on responses using streamlit-feedback, and link to the traces in LangSmith (View the app)
• chat_with_documents.py: Chatbot capable of answering queries by referring custom documents (View the app)
• chat_with_sql_db.py: Chatbot which can communicate with your database (View the app)
• chat_pandas_df.py: Chatbot to ask questions about a pandas DF (Note: uses PythonAstREPLTool which is vulnerable to arbitrary code execution, see langchain #7700)

Apps feature LangChain 🤝 Streamlit integrations such as the Callback integration and StreamlitChatMessageHistory.

More great app examples

Check out some other full examples of apps that utilize LangChain + Streamlit:

• Auto-graph - Build knowledge graphs from user-input text (Source code)
• Web Explorer - Retrieve and summarize insights from the web (Source code)
• LangChain Teacher - Learn LangChain from an LLM tutor (Source code)
• Text Splitter Playground - Play with various types of text splitting for RAG (Source code)
• Tweet Generator - Fine tune GPT-3.5 on tweets (Source code)

Setup

This project uses Poetry for dependency management.

# Create Python environment
$ poetry install

# Install git pre-commit hooks
$ poetry shell
$ pre-commit install

Running

# Run mrkl_demo.py or another app the same way
$ streamlit run streamlit_agent/mrkl_demo.py

Running with Docker

This project includes Dockerfile to run the app in Docker container. In order to optimise the Docker Image is optimised for size and building time with cache techniques.

To generate Image with DOCKER_BUILDKIT, follow below command

DOCKER_BUILDKIT=1 docker build --target=runtime . -t langchain-streamlit-agent:latest

1. Run the docker container directly

docker run -d --name langchain-streamlit-agent -p 8051:8051 langchain-streamlit-agent:latest

2. Run the docker container using docker-compose (Recommended)

Edit the Command in docker-compose with target streamlit app

docker-compose up

Contributing

We plan to add more agent and chain examples over time and improve the existing ones - PRs welcome! 🚀