The Depth of Field

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

Domain

Python

Difficulty

easy

Seniority

L3

Problem

A config export arrives as arbitrarily nested lists, but the consumer downstream only handles a fixed number of nesting levels. Collapse `lst` by exactly `depth` levels, preserving order, so a `depth` of 0 returns it untouched and anything still nested below the levels you collapse stays wrapped in its remaining sublists. A `depth` larger than the actual nesting simply flattens as far as the data goes.

Summary

Some containers hold containers that hold containers.

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