What I Learned in Week 4 of Python — Files, Real Programs & My First Class

Week 4 had a different energy.

The programs stopped feeling like exercises and started feeling like tools I'd actually use. A note-taking app that persists files to disk. An expense tracker that exports to CSV. A finance tracker that generates monthly reports. And then — at the very end — rewriting that finance tracker using a class for the first time.

One month of Python. Here's how Week 4 went.

Day 22 — File I/O: A Note-Taking App

The note-taking app was the first project I built where I genuinely thought: I would actually use this.