Birds of a Feather

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

Domain

Python

Difficulty

medium

Seniority

L4

Problem

An ingestion step hands you a list of record dicts in `records` and the name of a field in `key`. Return a dict mapping each value found under that field to the list of records carrying it, with each bucket keeping its records in the order they arrived.

Summary

Every record finds its kin; keep them in the order they arrived.

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