Python Course

A 60-day, self-paced Python course. Each day has a short lesson, tasks with hints that get more specific, and a worked solution. The app checks your output and explains errors in plain language.

Try it now: https://dna0102.github.io/python-course/

Nothing to install — a real Python interpreter runs inside the page, and your progress saves to your browser automatically.

Running it locally instead

pip install -r requirements.txt
python src/app.py

Open http://127.0.0.1:5000. This version uses a small Flask server, saves progress to src/progress.json, and has one extra feature the hosted version can't: a focus mode that blocks distracting sites (needs admin rights).

Two builds, one set of content

• src/ — the local Flask app above.
• docs/ — the static build behind the live link above. No server: code runs via Pyodide (Python compiled to WebAssembly) in the browser, and progress lives in each visitor's own localStorage.

Edit lessons and tasks under src/curriculum/days. Each task has a description, hint, expected output, solution and walkthrough — see any existing day file for the shape. After editing, run:

python tools/verify_solutions.py   # checks every solution still passes
python tools/build_static.py       # copies the content into docs/

then commit and push. GitHub Pages picks up docs/ automatically.

Limitations of the hosted version

• The first run each visit takes a few seconds while Python loads (cached after that).
• Day 54 (HTTP Requests) doesn't work — it needs real networking that Pyodide can't do in a browser sandbox. Works fine locally.
• No focus mode — a browser tab can't edit your hosts file.
• Progress is per browser and device, with no accounts.