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

L4

Problem

Given a list of event dicts (each with 'ts' in ISO format 'YYYY-MM-DDTHH:MM:SS' and 'type'), group by the hour prefix 'YYYY-MM-DDTHH' (first 13 characters of ts). Return a dict mapping each hour prefix to a list of 'type' values in original order.

Summary

Timestamps belong somewhere.

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