Against the Grain

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

Domain

Python

Difficulty

medium

Seniority

L4

Problem

A metrics export comes back as a `grid` of equal-length rows, one row per day and one column per metric. Reorient it so each metric's column becomes its own row, and return an empty list when `grid` has no rows or its rows are empty.

Summary

Turn the grid on its side and let every column stand up as a row.

Practice This Problem

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