Web Reference: Oct 31, 2008 ยท What is the difference between the list methods append and extend? .append() adds its argument as a single element to the end of a list. The length of the list itself will increase by one. .extend() iterates over its argument adding each element to the list, extending the list. Jan 13, 2026 ยท append () adds a single item (of any type) to the end of a list. extend () adds all elements from an iterable (like a list, tuple, or set) to the end of the current list. May 30, 2024 ยท When append() is used to add a new element, that element becomes a single element of the list, even if it is itself a list. In contrast, when extend() is used to add multiple elements to a list, each element is added as a separate element in the list.
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