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The File Tree Builder
A medium Python interview practice problem on DataDriven. Write and execute real python code with instant grading.
- Domain
- Python
- Difficulty
- medium
- Seniority
- senior
Problem
Your deploy pipeline logs every file path that changed in the latest release. For the post-deploy audit dashboard, you need to reconstruct the directory tree from flat path strings. Write a function that takes a list of file paths and builds a nested dictionary representing the directory structure, where leaf files map to null.
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Solve this Python problem with real code execution. DataDriven runs your Python code in a sandboxed Docker environment and grades it instantly.