Jupyter and Scripts

A research notebook can produce the wrong result if cells run in an unexpected order. This lesson explains when to use a notebook, a script or a module. It shows how to keep a reusable calculation function separate from the code that prints a report. A fresh run and tests check that the result does not depend on hidden state.

Learning objectives. By the end of this note you should be able to choose a notebook or script, recognise hidden notebook state, and structure a script with a main entry point.