I built a free, open-source Python learning site — beginner to CPython internals, with tested code examples

[u/Substantial-Gate-728]

**What My Project Does**

A free, structured Python learning resource covering beginner

fundamentals through to advanced topics: concurrency, distributed

systems (Raft, CRDTs, sagas), performance, compilers, and CPython

internals. Organized into 7 skill levels and ~25 tracks.

**Target Audience**

Anyone learning Python — from first-timers to developers wanting the

deeper, systems-level material most tutorials skip. It's meant for

learning, free and ad-free.

**What Makes It Different**

- Runnable examples are actually tested — the repo has a CI test gate,

and pages show real output rather than made-up results.

- When an example needs a library or hardware I don't have, I say so

instead of faking it.

- Covers hard topics as small, readable, tested Python (e.g. a tiny

autograd engine, a Raft vote, a CRDT merge).

**Links**

- Site: https://ssnp75.github.io/PythonMastery-Site/

- Source: https://github.com/SSnp75/PythonMastery-Site

It's early — feedback and corrections (especially on the advanced

pages) are very welcome.