Web Reference: 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. Mar 4, 2015 · add method directly adds elements to the set while the update method converts first argument into set then it adds the list is hashable therefore we cannot add a hashable list to unhashable set. Apr 28, 2025 · update () method add multiple elements to a set. It allows you to modify the set in place by adding elements from an iterable (like a list, tuple, dictionary, or another set).
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