Hidden Depths

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 config loader returns settings as a flat dict whose keys encode their depth with dots, like `a.b.c` for a value three levels down. Return the equivalent nested dict, where each dot-separated segment of a key becomes one level deeper and the value lands at the end of its path; a key with no dots stays at the top level.

Summary

Each dot marks a level. Rebuild the tree it stands for.

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