如何反转列表或向后循环？

list python

2022-09-05 01:00:40

如何在Python中反向迭代列表？

array = [0, 10, 20, 40]
for (i = array.length() - 1; i >= 0; i--)

答案 1

要获取新的反向列表，请应用反向函数并将项目收集到列表中：

>>> xs = [0, 10, 20, 40]
>>> list(reversed(xs))
[40, 20, 10, 0]

向后循环访问列表：

>>> xs = [0, 10, 20, 40]
>>> for x in reversed(xs):
...     print(x)
40
20
10
0

答案 2

>>> xs = [0, 10, 20, 40]
>>> xs[::-1]
[40, 20, 10, 0]

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