Learning and looking at the internals of frameworks like Rails and Pyramid can be useful. There's a good book http://aosabook.org/en/index.html http://aosabook

Learning and looking at the internals of frameworks like Rails and Pyramid can be useful. There's a good book http://aosabook.org/en/index.html http://aosabook.org/en/index.html called the Architecture of Open Source Applications. More generally, you might find it useful to read Christopher Alexander's Timeless Way of Building.