Streamlit is an open source framework for quickly creating apps and data visualizations from python. Start from a python script, add some interaction widgets, and you get a nice looking app that you can share quite easily.

SQLAlchemy and Postgres are a very popular choice for python applications needing a database. While using them in the context of a python WSGI web application, I’ve often encountered the same kinds of bugs, related to connection pooling, using the default configuration in SQLAlchemy.