kurotanshi / rails-pycall-langchain

Rails + Langchain Chatroom example using pycall.rb

rails-pycall-langchain

a Rails + Langchain Chatroom example using pycall.rb

• langchain: https://github.com/hwchase17/langchain
• pycall.rb: https://github.com/mrkn/pycall.rb
• my talk slide: https://ihower.tw/blog/archives/11596

Features

• Langchain ChatOpenAI
• Langchain RetrievalQAChain (using OpenAIEmbedding + FAISS vector store) for PDF upload
• Langchain Agents (using python_repl)
• Ruby OpenAI gem

Rails Background job

Using sucker_punch gem for demo purpose. If possible, I would recommend using delayed_job gem: https://github.com/collectiveidea/delayed_job

About pycall.rb

1. There're some pycall.rb example at /examples
2. Rails will load lib/lang_chain.rb

Setup

1. Install Python 3:

brew install python

(Note: Open a new Terminal and make sure that which python3 has the newly installed python)

2. Install Python packages:

pip3 install openai
pip3 install langchain
pip3 install tiktoken
pip3 install pypdf
pip3 install faiss-cpu

3. Edit config/secrets.yml, Add your OpenAI API key
4. bundle
5. rake db:migrate
6. rails s