napkin-calc: Open-Source Tool Blending Notebooks, Spreadsheets and Calculators

Developer Thomas Godden open-sourced napkin-calc, a web-based tool he's used for years that sits between a Python notebook, spreadsheet, and calculator. Its interpreter is essentially an eval() wrapper, natively supporting lambdas, numpy arrays, and conditionals.

2026-09-22 ~ 2026-09-22 · 3 related posts

• Dev open-sources napkin-calc, a Python-spreadsheet-calculator hybrid he uses daily — GoddenThomas · 2026-09-22
• Dev Web-ifies a Daily-Driver Tool Between a Notebook, Spreadsheet and Calculator — GoddenThomas · 2026-09-22
• The Tool's Interpreter Is Just an eval() Wrapper — With Lambdas and Numpy Working — GoddenThomas · 2026-09-22