PyPy · version 3.11

Run PyPy 3.11 online

PyPy 3.11 — run it in a Firecracker microVM on ls-judge. Real toolchain, no wrapper.

Starter code

What you get in PyPy 3.11

Clicking "Run now" opens the playground with this exact code and a matching test case — passes on first Run.

pypy
PyPy 3.11
n = int(input())
print(n * 2)
stdin →21
expected →42
How it runs

How ls-judge runs PyPy 3.11

Every submission is compiled and executed inside its own Firecracker microVM — the same isolation primitive AWS Lambda uses. No shared container, no shared kernel with other users' code. The PyPy 3.11toolchain shipped with the microVM is the real thing (not a browser-side emulation): syscalls behave the way they do in production, and the compile / runtime behaviour matches what you would see on your own machine with that version installed.

Feed stdin from the Tests panel, watch verdicts stream per test case over a WebSocket. Free to use, no sign-up, works from any browser.

Other PyPy versions
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