Fix My Tutorial
NVIDIA Nemotron on Nebius Token Factory

Is that tutorial still working?

Paste a Python or JavaScript tutorial. We run every step in a fresh sandbox, find what broke since it was written, and fix it with sources you can check.

Python 3.12 and Node.js 22 · a run takes 1 to 6 minutes · up to 3 runs per hour

Check a tutorial from its own page: drag Check this tutorial to your bookmarks bar.

Tutorials we already checked

Fixed Understanding the FFT Algorithm jakevdp.github.io · 2013 Fixed Embedding Matplotlib Animations in IPython Notebooks jakevdp.github.io · 2013 Fixed Pandas Grouper and Agg Functions Explained pbpython.com · 2017

How it works

Every fix is run, raced against the alternatives and replayed from scratch before we call it fixed.

  1. 01

    Plan

    Nemotron 3 Super

    Reads the tutorial and turns it into runnable steps, keeping the code exactly as written.

  2. 02

    Run

    Token Factory Sandboxes

    Every step runs in isolation, with a checkpoint saved after each one.

  3. 03

    Diagnose

    Nemotron 3.5 Lightning + Tavily

    Reads the error, then finds the release note or issue that explains it.

  4. 04

    Repair

    Nemotron 3 Ultra

    Proposes up to three cited fixes that race in parallel from the last good checkpoint.

  5. 05

    Prove

    Clean replay

    The fixed tutorial is replayed from scratch before it is called fixed.