Web Reference: Definition and Usage The extend() method adds the specified list elements (or any iterable) to the end of the current list. ary.extend (ext) merely adds reference to "ext" list to the end of the "ary" list, resulting in less memory transactions. As a result, .extend works orders of magnitude faster and doesn't use any additional memory outside of the list being extended and the list it's being extended with. Jul 23, 2025 ยท In Python, extend () method is used to add items from one list to the end of another list. This method modifies the original list by appending all items from the given iterable.
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