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Dicts & Sets easy

Merge dicts summing values

Write a function that merges two dictionaries by summing values for duplicated keys.

dicts merge sum

Dicts & Sets easy

Missing keys default zero

Write a function to sum numeric values from dictionaries, treating missing keys as zero.

dictionaries sum defaults

Dicts & Sets easy

Two Sum with Dict

Implement the classic Two Sum problem: return indices of two numbers that add up to a target using a dict.

dictionary pair-sum hash-map

Dicts & Sets easy

Count Pairs with Sum

Implement a function that counts the number of distinct pairs in a list summing to a target.

dictionary pair-counting hash-map

Showing 4 challenges · easy · Dicts & Sets

Dicts & Sets — Python coding challenges

What you will find here

This page lists dicts & sets challenges — real Python problems you solve in the browser IDE with instant test feedback. Each challenge includes a clear brief, starter code, and automated checks.

Challenges vs tutorials and quizzes

Challenges test what you can build under constraints. For guided teaching, use our Python tutorials. For quick checks, try quizzes or copy snippets from code samples.