Difference Between Append And Extend In Python
difference between append and extend in python | Explained with examples
Difference Between Append And Extend In Python
In Python, both the `append()` and `extend()` methods are used to add elements to a list, but they have key differences. The `append()` method is used to add a single element to the end of a list, whereas the `extend()` method is used to add all elements from another iterable (such as another list or a tuple) to the end of the list. Essentially, `append()` adds an individual element to the list, while `extend()` adds multiple elements at once. It's important to keep this distinction in mind when choosing between the two methods in order to achieve the desired outcome when adding elements to a list in Python.
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1 - Append and extend are two methods in Python that are used to add elements to a list.
2) When using append, you can add a single element at the end of a list.
3) For example, if you have a list ‘numbers’ with [1, 2, 3], and you use numbers.append(4), it will result in [1, 2, 3, 4].
4) On the other hand, when using extend, you can add multiple elements (such as another list or iterable) to the end of a list.
5) Continuing with the previous example, if you use numbers.extend([5, 6, 7]), it will result in [1, 2, 3, 4, 5, 6, 7].
6) Append modifies the original list by adding the element at the end, whereas extend appends the elements from the iterable that you provide.
7) If you use append with a list as an argument, it will add the list as a single element at the end of the original list.
8) In contrast, extend will unpack the elements from the list and add them individually to the original list.
9) It is important to note that append is an O(1) operation, while extend's runtime complexity depends on the length of the iterable being added.
10) Understanding the differences between append and extend is crucial for efficient list manipulation in Python.
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