Posted By: Anonymous
In Python, how do you get the last element of a list?
some_list[-1] is the shortest and most Pythonic.
In fact, you can do much more with this syntax. The
some_list[-n] syntax gets the nth-to-last element. So
some_list[-1] gets the last element,
some_list[-2] gets the second to last, etc, all the way down to
some_list[-len(some_list)], which gives you the first element.
You can also set list elements in this way. For instance:
>>> some_list = [1, 2, 3] >>> some_list[-1] = 5 # Set the last element >>> some_list[-2] = 3 # Set the second to last element >>> some_list [1, 3, 5]
Note that getting a list item by index will raise an
IndexError if the expected item doesn’t exist. This means that
some_list[-1] will raise an exception if
some_list is empty, because an empty list can’t have a last element.