在Python中获取列表的最后一个元素 [英] Getting the last element of a list in Python

问题描述

在Python中，如何获得列表的最后一个元素？

In Python, how do you get the last element of a list?

推荐答案

some_list [ -1] 是最短和最Pythonic。

some_list[-1] is the shortest and most Pythonic.

事实上，你可以用这种语法做更多的事情。 some_list [-n] 语法获取第n个到最后一个元素。所以 some_list [-1] 获取最后一个元素， some_list [-2] 获取倒数第二个等，一直到 some_list [-len（some_list）] ，它给你第一个元素。

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.

你也可以用这种方式设置列表元素。例如：

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]

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