Python Dictionary Transformation | Coding Challenges

Introduction

In Python, a dictionary is a collection of key-value pairs. Sometimes, we need to transform the values of a dictionary using a function. This challenge will test your ability to create a function that takes a dictionary and a function as arguments and returns a new dictionary with the same keys as the original dictionary and values generated by running the provided function for each value.

Skills Graph

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Map Dictionary Values

Problem

Write a function map_values(obj, fn) that takes a dictionary obj and a function fn as arguments and returns a new dictionary with the same keys as the original dictionary and values generated by running the provided function for each value.

Example

users = { 'fred': { 'user': 'fred', 'age': 40 }, 'pebbles': { 'user': 'pebbles', 'age': 1 } } map_values(users, lambda u : u['age']) ## {'fred': 40, 'pebbles': 1}

Constraints

The function should work for any dictionary and function that meet the requirements.

The function should not modify the original dictionary.

Summary

In this challenge, you learned how to create a function that takes a dictionary and a function as arguments and returns a new dictionary with the same keys as the original dictionary and values generated by running the provided function for each value. This is a useful technique for transforming the values of a dictionary.

Map Dictionary Values | Challenge