Group by Owner

flat list to per-person view

Part of: Meeting Notes to Action Items

You now have a flat list of validated action items. It's correct, but it's not yet useful . Nobody wants to scan twenty mixed items to find their three. The payoff view of this product is per-person: each owner sees exactly what they owe, in one place. That's grouping, and it's pure Python, no model needed. Grouping is a dictionary of lists The whole operation is one pattern: a dict where each key is an owner and each value is the list of that owner's items. setdefault builds it in one pass: groups.setdefault(owner, []) returns the existing list for that owner, or creates a fresh empty list the first time you see them, then you append. After one loop, groups maps each owner to all their tasks. This "dict of lists" is the most common shape in all of data wrangling; once it's in your fingers you'll reach for it constantly. Sort for a stable report A dict preserves insertion order, which means owners come out in the order they first appeared in the transcript. That's arbitrary. A report reads better alphabetically, and it's stable, run it twice and Alex is always first: Within each owner, the tasks stay in transcript order, which is usually the order they were discussed, a sensible de

Challenge: Group Tasks by Owner