Swapping Dictionary Values in Python

Swapping dictionary values in Python uses the age-old swap logic found in the course materials of many a computer science course. However, Python provides a simplified syntax for achieving such operations that can also be applied to dictionary objects!

Zack West
alpharithms

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swap dictionary values in python
Image: alpharithms

Python dictionary objects are convenient means of storing key-value pairs. Dicts provide convenience methods for data access but leave developers to their own means for operations. For example, to swap the position of two values in a python dictionary one must devise a custom approach — there is no ‘swap’ method.

This is no difficult task and can be approached like any other basic swap logic implemented across many languages. Python does, however, provide does allow one to simplify the syntax of swaps — including among values in dict objects. This quick tutorial will look at several approaches and use-cases for swapping values in a Python dict.

TL;DR

Python’s evaluation order allows simplified syntax for making swaps. Dictionary items can have values swapped using the same syntax, such that the keys are conceptually like variables. This example code provides a demonstration:

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Zack West
alpharithms

Entrepreneur, programmer, designer, and lifelong learner. Can be found taking notes from Mother Nature when not hammering away at the keyboard.