Web Reference: Today, you will learn how to safely update sets by adding and removing elements while maintaining the unique nature of set collections. Apr 28, 2025 · It allows you to modify the set in place by adding elements from an iterable (like a list, tuple, dictionary, or another set). The method also ensures that duplicate elements are not added, as sets inherently only contain unique elements. Definition and Usage The update() method updates the current set, by adding items from another set (or any other iterable). If an item is present in both sets, only one appearance of this item will be present in the updated set. As a shortcut, you can use the |= operator instead, see example below.
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