This sample is an endpoint that tells programming jokes and shows how to deploy a flask app that uses Langchain on to AWS via Defang.

1. Download Defang CLI
2. (Optional) If you are using Defang BYOC authenticated with your AWS account
3. (Optional - for local development) Docker CLI

1. Open the terminal and type defang login
2. Set the environment variable OPENAI_API_KEY by typing defang config set OPENAI_API_KEY.
3. Type defang compose up in the CLI.
4. Your app will be running within a few minutes.

For development, first clone the project and navigate to its directory. After such, please run the command

docker compose up --build

This will start a Docker container with the flask app which will display the result of the langchain prompt.

Title: Flask & LangChain

Short Description: A sample project demonstrating how to deploy LangChain with Flask on Defang.

Tags: LangChain, Flask, AI, Python

Languages: python

• git pull origin main
• git checkout -b
• edit or add
• git status
• git add
• git commit
• git push origin
• make a PR

• pip install -r requirements.txt

• flask --app app/main.py run