The Narrow Lens

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

Domain

Python

Difficulty

medium

Seniority

L5

Problem

You are smoothing a stream of raw sensor readings before it feeds an alerting pipeline, replacing each reading with a trailing average that damps momentary spikes. Given the readings `values` and a `window_size`, return a list of the same length where each element is the average of the readings up to and including that position, looking back at most `window_size` readings. Near the start, before `window_size` readings exist, average only the ones seen so far.

Summary

A narrow timeframe. Everything inside matters.

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