Python and Pylons and Jinja2

and maybe maps with Leaflet too.

Pylons Project Pyramid is for writing web applications in Python.

"Jinja2 is a modern and designer friendly templating language for Python, modelled after Django’s templates."

By "templating" they mean embedding python (or code) inside HTML files, like PHP.

"bootstrap" is a "front end framework". It is a bunch of javascript and css files that help you build a site with a consistent look.

Pyramid helps you write WSGI applications, so you are writing in python and it generates the HTML.