The Deep Config

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

Domain

Python

Difficulty

medium

Seniority

L5

Problem

A service loads its settings as a nested dict, where each level of nesting groups a section with its sub-settings and the leaves (non-dict values) are the actual settings. Collapse `config` into a single-level dict whose keys are the full path from the top down to each leaf, with the path segments joined by '.'. An empty input comes back empty, and a section that holds no leaves contributes nothing.

Summary

Every setting has a path. Trace it down to the value.

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