stipple 0.1.0

WebGPU scatter widget for Jupyter — render millions of points, lasso, return row indices to Python.

Stipple

WebGPU scatter widget for Jupyter. Render millions of points, lasso a region, get the row indices back in Python.

from stipple import Stipple
w = Stipple(df, x="umap_0", y="umap_1", color="label")
w
# ... user lassos in widget ...
w.selected_indices  # numpy array

Status

Pre-release. Gate ladder:

• G0 — Package skeleton + 100-point WebGPU render
• G1 — Arrow-over-comm transport (1M rows)
• G2 — 1M scatter with pan/zoom + discrete color
• G3 — 10M scale via chunked buffers
• G4 — Polygon lasso → selected_indices
• G5 — Example notebooks + cross-env test matrix
• G6 — Wheel packaging

Dev setup

uv sync --extra dev
cd js && npm install && npm run build && cd ..
uv run jupyter lab examples/

Architecture

• Python: anywidget.AnyWidget subclass with traitlets. Arrow IPC over the comm channel for tensor/DataFrame transport.
• JS: Vite-built ESM bundle at src/stipple/_static/index.js. WebGPU scatter pipeline with instanced unit quads.

See Projects/Research/Stipple/JUPYTER-WIDGET-RESEARCH.md in the upstream Thinking vault for design rationale.

License

MIT