All the Way Down

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 export arrives as a list whose entries are either plain values or further lists, nested to arbitrary depth with no fixed structure. Collapse it into a single flat list holding every leaf value in left-to-right order. Treat strings as leaf values, not as sequences to descend into.

Summary

However deep it nests, every leaf belongs on one line.

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