The Column Shuffle

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

Domain

Python

Difficulty

medium

Seniority

L6

Problem

Given records (list of dicts with 'id' and 'amount'), group by id preserving input order. For each group, produce a dict with 'id' plus keys 'amount_1', 'amount_2', ..., 'amount_k' for that group's amounts in order. Return the list of per-id dicts in the order each id first appears.

Summary

Rows in, columns out. Number them.

Practice This Problem

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