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The Hourly Bucket
A medium Python interview practice problem on DataDriven. Write and execute real python code with instant grading.
- Domain
- Python
- Difficulty
- medium
- Seniority
- mid, senior
Problem
Write a function that groups events by the hour they occurred. Each event is a dict with 'ts' (ISO timestamp like 'YYYY-MM-DDTHH:MM:SS') and 'type'. Return a dict mapping the hour prefix 'YYYY-MM-DDTHH' to a list of event type strings in original order.
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