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Synthetic 5 · Aggregate Inventory

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Synthetic 5 · Aggregate Inventory

82 words

1 min read

2026-08-02

Aggregate Inventory

Write aggregate_inventory(records). Each record is (category, quantity). Return a list of (category, total) pairs sorted alphabetically by category. Repeated categories must be combined.

Template Code


python
def aggregate_inventory(records):
    pass

Public Tests

is_equal(aggregate_inventory([("pen", 3), ("book", 2), ("pen", 4)]), [("book", 2), ("pen", 7)]) is_equal(aggregate_inventory([]), []) is_equal(aggregate_inventory([("cable", -1), ("cable", 5)]), [("cable", 4)])

MCQ

3 Unit Assessment

Reference-only archive item

The completed export preserved the prompt as an image but not a reusable answer key. The reconstruction below is for study, not scoring.

Study reconstruction

def aggregate_inventory(records):
    totals = {}
    for category, quantity in records:
        totals[category] = totals.get(category, 0) + quantity
    return [(category, totals[category]) for category in sorted(totals)]