PYTHON PROBLEM 127 · Intermediate

Find the top k frequent values: Top two product codes

Find the two most frequent product codes.

Counter · top kCountertop k

PROBLEM OVERVIEW

What this Python exercise asks you to practise

This scenario tests find the top k frequent values. It belongs to the Sets and Dictionaries roadmap and uses the counter · top k pattern.

Uniqueness, membership tests, key-value lookup, frequency counting, and grouping.

COMPLETE WORKSPACE

Learn the plan, trace the logic and run the solution

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SKILL TO CARRY FORWARD

Pattern relevance

This exercise strengthens counter · top k. Be ready to explain the input, the rule, the boundary cases, and why the chosen approach is appropriate.