All the Way Down

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 content `feed` arrives as a list whose entries are grouped into sub-lists nested to arbitrary depth; collapse it into a single flat list of leaf values in their original left-to-right order. A leaf is any non-list value, so a string stays whole rather than being split into its characters, and empty sub-lists contribute nothing.

Summary

Sections nested inside sections. One stream, in order.

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