Python Groupby Adjacent Runs Visual

Inputs: [Python version], [input sequence], [key function]. Explain itertools.groupby as grouping consecutive equal keys rather than all equal keys globally. Use the sequence A,A,B,A as a minimal fixture. Materialize each group before advancing, contrast with a deliberately sorted copy, and explain that sorting changes order. Produce a token-strip diagram separating the final A from the first A run. Adapt the presentation to [audience] and [tone]. End with a concrete check of the defining task detail against the inputs.

Use the attached references only for the specified visual attributes. If a required reference is missing, request it before generation. Produce one finished image with a deliberate focal point, consistent geometry and clean margins. Keep any exact wording on a separate editable label layer or leave its area blank. Do not invent evidence or present an illustration as documentary proof.