What is the difference between append and extend in Python lists?

Can you explain the difference between append and extend in Python lists?

Sure! In Python, append adds a single element to the end of a list, while extend adds multiple elements from an iterable.

Can you give me an example of how to use both?

Of course! If you have a list my_list = [1, 2, 3], using my_list.append(4) will result in [1, 2, 3, 4]. Using my_list.extend([5, 6]) will change it to [1, 2, 3, 5, 6].

What happens if I use append with a list?

If you use append with a list, it will add the entire list as a single element. For example, my_list.append([7, 8]) will result in [1, 2, 3, [7, 8]].

Is there a performance difference between the two?

Yes, append is generally faster than extend when adding a single element, while extend is more efficient for adding multiple elements at once.