Written by Feng Yu
What I Built Ask PyData is a Sanity-backed agent that answers library-selection and migration questions for the Python data stack ā pandas, Polars, DuckDB. It only works well because the content is structured: every claim carries a sourceUrl, every version-sensitive answer is checked against versionNote documents first, and contradictory claims are surfaced as disputed instead of silently picked. Why this domain: pandas 3.0 shipped in January 2026 (new default string dtype, Copy-on-Write, ...