The CPU raycaster
A Wolfenstein-style renderer that computes all 57,600 pixels per frame on the CPU. It runs right on this page — scroll down to play it.
All the Flow You'd Expect
Python v2 knows the usual control flow statements that other
languages speak — if, for, while and
range — with some of its own twists, of course.
Python v2 is a programming language that lets you work quickly and integrate systems more effectively. »»> Learn More
The Python v2 Foundation needs your support
Python v2 is free, open source, and developed entirely by people who
got tired of TabError. Help us keep the snake fed.
Python v2 0.2 “Sudbury” is out
Trailing commas, multi-line calls, cross-runtime parity tests, and a terminal raycaster.
Download v0.2
Trailing commas, multi-line calls, cross-runtime parity tests, and a terminal raycaster.
»»>Success Stories
Things people have already built with Python v2 — in a weekend, with zero GPU calls.
The browser playground
The reference interpreter ported 1:1 to JavaScript. The console at the top of this page is the real thing — hit >_ and see.
Two runtimes, one truth
64 tests lock the Python and JS runtimes together, byte for byte — including the error messages.
»»>Get Started
Python v2 is free and open source. It runs anywhere Python 3 runs — no install step, no dependencies. Full setup guides for VS Code, dev containers, desktop and any editor are on the Downloads page and in the documentation — then learn the language with the tutorial.
1. Grab the runtime
git clone https://github.com/gefrus112/pythonv2
cd pythonv22. Run something
python3 -m pyv2 examples/hello.pyv23. Or just talk to it
python3 -m pyv2
>>> print(f"{'2' * 3}")
222Your first program
# hello.pyv2
fn greet(name):
if name == "":
return "Hello, stranger!"
end
return f"Hello, {name}!"
end
for who in ["World", ""]:
print(greet(who))
end»»>Why v2 beats v1
| Old Python | Python v2 |
|---|---|
def foo(): + invisible whitespace | fn foo(): … end |
| TabError: inconsistent use of tabs | No such thing. Ever. |
"n=" + str(n) | "n=" + n |
x if ok else y (backwards) | ok ? x : y |
assert statement | assert(cond, msg) — a normal function |
Surprising nonlocal rules | Closures just work |
»»>Better. By Design.
Everything you loved about Python — plus the fixes the old one never shipped.
No More Indentation Wars
Blocks open with : and close with end.
Tabs, spaces — do whatever. The compiler doesn't care. Your team won't either.
Real Closures
Assignment finds the variable that already exists, wherever it lives.
Counters that count. No nonlocal incantations required.
F-Strings, Solved Forever
f"Hello, {name}!" — interpolation that just works,
expressions and all. String concatenation with numbers is legal too.
Forward Ternary
ok ? "yes" : "no" reads left to right, like your eyes do.
Wild concept.
Runs In Your Browser
The same language runs in the terminal and on this very page — the playground is the real interpreter, not a screenshot.
Two Implementations, One Truth
A Python reference runtime and a JavaScript twin, locked together by parity tests. Byte-identical output or the build fails.
»»> CPU Rendering. No GPU Required.
This level is drawn the hard way: a software raycaster computes every
single pixel on the CPU and writes it into a 320×180 framebuffer. No WebGL.
No shaders. 57,600 pixels per frame of pure for loops.
– FPS
CPU • 320×180 • 0 GPU calls
x 6.0 y 2.0
»»>Documentation
Learn the language step by step in the tutorial — or dig into installation in VS Code, dev containers / Codespaces, desktop and any code editor.
print(...)
Print any number of values, space-separated.
print("sum:", 1 + 2)
f-strings
Interpolate any expression with braces.
f"{name} scored {score * 2}"
fn / end
Functions are values. Closures capture properly.
fn add(a, b): return a + b end
if / elif / else
Blocks end with end, not a column number.
if x > 0: print("pos") end
while / break / continue
The usual loop verbs, no surprises.
while true: break end
for … in
Iterate lists, strings, maps and ranges.
for i in range(1, 10, 2): print(i) end
lists
[1, 2, 3] with methods that spark joy.
xs.push(4) xs.sort()
maps
Bare keys, dot access, safe get.
hero = {name: "Ada"} → hero.name
ternary
Condition first, like a question should be.
status = ok ? "yes" : "no"
builtins
len, range, type, str,
int, sort, join, assert, …
print(type(2), len("abc"))
string methods
upper, split, replace,
trim, contains, slice, …
"a,b".split(",").join("-")
numbers
+ − * / // % **, floored mod, real division.
print(7 // 2, -7 % 3, 2 ** 10)
Full install guides & language reference: docs.html · grammar: docs/LANGUAGE.md
»»>News & Events
Oct 21, 2026
Python v2 0.2 "Sudbury" released
Trailing commas everywhere, multi-line calls, parity-tested number formatting, and a terminal raycaster example. Also: this website.
Read more →Oct 21, 2026
Playground goes live
The interpreter now runs in your browser at 100% fidelity with the reference runtime. Try the console at the top of this page.
Read more →Coming soon
Pyv2Conf 2027 — call for talks
One track, one rule: every talk must demo something running in the CPU renderer. Stickers included.
Read more →»»>The Community Runs On Snacks
Python v2 is built in the open on GitHub. Star the repo, file an
issue, send a pull request, or just argue about end vs braces.
1language, zero config
2runtime twins
64passing tests
∞indentation saved