Deep Flatten

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

Domain

Python

Difficulty

medium

Problem

Our API responses occasionally return arbitrarily nested list structures that downstream consumers expect flat. Flatten a deeply nested list into a single list of all leaf values, regardless of nesting depth.

Practice This Problem

Solve this Python problem with real code execution. DataDriven runs your Python code in a sandboxed Docker environment and grades it instantly.