Hey, this is not really a question, rather a post about giving back to the community! I've built a number of Python backends for Shopify Apps and my preferred frameworks have been Django and Flask. I took the time to create a fully functioning Python + Flask backend service that helps you spin up a backed that does:
Register for webhooks
A webhook parser that parses orders (can easily be extended to fit your needs)
A simple starter page for the embedded app dashboard
A code structure that is easy to work with and adapt to fit your business needs.
I also put together a comprehensive guide that takes you through the process of getting things up and running on your local machine.