In Python, What Distinguishes The List Methods Append And Extend?

In Python, the append() and extend() methods are used to add elements to a list, but they have some differences in functionality.

  1. append() method: This method is used to add an element at the end of a list. It takes a single argument and adds it as a single item to the existing list. If the argument is an iterable (like a list or tuple), it is added as a single item within the list.


my_list = [1, 2, 3]
my_list.append(4)         # [1, 2, 3, 4]
my_list.append([5, 6])    # [1, 2, 3, 4, [5, 6]]
  1. extend() method: This method is used to add elements from an iterable (like a list, tuple, or string) to the end of a list. It takes an iterable as an argument and adds each element of the iterable to the existing list, one by one.


my_list = [1, 2, 3]
my_list.extend([4, 5])         # [1, 2, 3, 4, 5]
my_list.extend((6, 7))         # [1, 2, 3, 4, 5, 6, 7]
my_list.extend("hello")        # [1, 2, 3, 4, 5, 6, 7, 'h', 'e', 'l', 'l', 'o']

In summary, append() adds a single item or an iterable as a whole to the end of a list, while extend() adds each element of an iterable to the end of a list individually.

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