Python 3 tutorials list methods extend vs append

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in python, `list` is a built-in data type that allows you to store a collection of items in a specific order. two common methods used to add elements to a list are `extend()` and `append()`.

1. `append()`: this method is used to add a single element at the end of the list. the element can be of any data type (integer, string, list, etc.). when you use `append()`, the entire element is added as a single item to the list.

2. `extend()`: this method is used to add multiple elements to the end of the list. it takes an iterable (such as a list, tuple, or string) as its argument and adds each element from the iterable to the list individually. this means that if you pass a list to `extend()`, its elements will be added to the original list, not the list itself.

here is an example comparing the use of `extend()` and `append()`:



in the first example, `append(4)` adds the single element `4` to the end of the list. in the second example, `extend(additional_elements)` adds each element from the `additional_elements` list (`4` and `5`) to the original list.

remember that `append()` modifies the original list by adding a single element, while `extend()` modifies the original list by adding multiple elements from an iterable. choose the method that best fits your use case based on whether you want to add a single element or multiple elements to a list.

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