Python TutorialLesson 16Free preview

Python Sets

This lesson is part of Python · All levels

Summary

A set is a unique collection of elements without a guarantee of order, so it is very useful for removing duplicates and checking membership quickly. Elements are written in curly braces with a comma separator, while empty sets must be made with set(). Python provides mathematical operations such as union, intersection, and difference to compare two sets.

Key points

The set only keeps unique and unordered elements.
The empty set is made with set(), not {} meaning dictionary.
The method is used to manage the elements.
The operations union (), intersection (&), and difference (-) compare sets.

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