extend () and append () are two Python list methods used to add elements to a list but they behave quite differently. The append () adds a single item or any object, while extend () adds each element of an iterable to the list.

The append in Python is a method that helps attach a single element to the end of an already-existing Python list. There are several benefits of using lists in Python, for instance, it is similar to arrays in other languages. Further, such lists are mutable, meaning that they can be changed and updated even after the list has been created.

The append in Python takes a single item as an input parameter and adds it to the end of the given list. In Python, append () doesn’t return a new list of items; in fact, it returns no value at all. It just modifies the original list by adding the item to the end of the list.

If each input is a single value, use append. If inputs are lists themselves, use extend. In summary, append and extend serve different purposes in Python lists. Choose the right method based on your needs. For more Python tips, explore our guide on adding elements to the left of a list.