The Deep Selector

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

Domain

Python

Difficulty

easy

Seniority

L4

Problem

A service hands back deeply nested JSON config, and downstream code needs only a handful of values from it, each named by a dot-separated path like `user.name`. Given `data` (the nested dict) and `fields` (the list of paths), return a dict mapping each path to the value found by walking that sequence of dict keys. A path maps to `None` when any segment along the way is missing or lands on something that is not a dict.

Summary

Tell it what you want. It knows where to look.

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