Pivot Records

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

Domain

Python

Difficulty

hard

Seniority

L4

Problem

Given a list of dicts (each with 'row', 'col', 'val'), return a nested dict {row: {col: val}}.

Summary

Long format is easy. Wide format is useful.

Practice This Problem

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