The Path Inward

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

Domain

Python

Difficulty

medium

Seniority

L4

Problem

A service config nests sections inside sections, and `config` holds one such tree. Given `path`, a list of keys naming a single setting's route from the top level inward, return that setting's value. Return `None` the moment the path can no longer be followed, including when it runs into a plain value before the keys run out.

Summary

Every setting hides a few levels down. Follow the route, or come back empty.

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