The Intervals

A medium Python interview practice problem on DataDriven. Write and execute real python code with instant grading.

Domain

Python

Difficulty

medium

Seniority

L3

Problem

Given a list of date strings in 'YYYY-MM-DD' format, bucket each date into a 7-day week starting from the earliest date. Week 1 covers days 0-6 after the min date; week 2 covers days 7-13; etc. Return a dict mapping the week number (as a string key) to the list of dates that fell in that week, preserving input order within each bucket.

Summary

Timestamps in buckets.

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