SCG Lab

A modern, offline-first multi-language notebook IDE — Jupyter Lab feel, single pip install.
by Squid Consultancy Group · @analyticswithharry

What is it?

SCG Lab is a browser-based notebook environment that runs entirely on your machine. It bundles a React/Monaco frontend with a FastAPI + Jupyter-kernel backend into one installable Python package.

• Languages: Python, JavaScript (Node), C, C++
• Jupyter-style UI: tabbed File / Edit / View / Insert / Cell / Run / Kernel / Tabs / Settings / Demo / Help menus, command palette, dark/light theme
• Mandatory line numbers in every code cell
• Built-in demos for every supported language (one click to load)
• Environment manager: create/activate per-project Python envs from the CLI

Install (works on any machine)

pip install scg-lab

Run

scg-lab                 # opens http://127.0.0.1:8765
scg-lab --port 9000

That's it — no Node, no extra build steps. The frontend ships pre-built inside the wheel.

Brief Usage

1. pip install scg-lab then run scg-lab.
2. Pick a language tile from the Launcher (or click Demo in the menu bar to load a ready-made notebook).
3. Type code in a cell — line numbers are always on.
4. Shift+Enter to run, Ctrl+Enter to run in place.
5. Use the Run menu for Run All / Run Above / Run Below / Restart & Run All.

Environment Management

# List environments
scg-lab env list

# Create a Python environment
scg-lab env create myenv --lang python

# Install packages into an environment
scg-lab env install myenv numpy pandas matplotlib

# Activate an environment
scg-lab env activate myenv

Supported Languages

Developer Build

cd frontend
npm install
npm run build    # outputs to ../scg_lab/static/

pip install -e ".[dev]"
scg-lab

License

MIT © Squid Consultancy Group