Playing with VisPy

I somehow came across this beautiful visualization of strange attractors written in Three.js. Then I remembered VisPy , a scientific visualization package in Python that I heard of in context of Vedo . We use Vedo for visualization at the Thousand Brains Project , so I decided to poke around the VisPy API and write some code without using LLM.1 ...

September 25, 2026 · 2 min · 219 words · Hojae Lee

Float Tolerances in NumPy Testing

A personal field guide to choosing floating-point tolerances in NumPy tests, starting from machine epsilon and ending with a few habits for assert_allclose, Hypothesis, and near-zero vector operations.

May 4, 2026 · 7 min · 1451 words · Hojae Lee