Web Reference: Definition and Usage The add() method adds an element to the set. If the element already exists, the add() method does not add the element. Mar 19, 2026 · Learn how to use Python's add () method to insert unique items into a set, with clear examples and explanations for effective data management. Following is the basic example of the Python Set add () method. Here we are creating a set with 3 elements and adding a fourth element to it. Since sets in Python doesn't allow duplicate elements if we try to add an existing element using this method the contents of the set remain unchanged.
YouTube Excerpt: How to use the __add__ magic
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