How to use HDF5 files in Python (via) HDF5: the missing manual. A detailed explanation of the HDF5 file format and how to work with it using the h5py module. HDF5 allows you to efficiently store multiple datasets (plus metatdata about them) in a single file and then load data from them without pulling the entire file into memory—kind of like SQLite but without the SQL support and more optimized for working with arrays.
Recent articles
- What happens if AI labs train for pelicans riding bicycles? - 13th November 2025
- Reverse engineering Codex CLI to get GPT-5-Codex-Mini to draw me a pelican - 9th November 2025
- Video + notes on upgrading a Datasette plugin for the latest 1.0 alpha, with help from uv and OpenAI Codex CLI - 6th November 2025