如何在python dict中反转键的顺序? [英] How to reverse order of keys in python dict?

问题描述

这是我的代码:

a = {0:'000000',1:'11111',3:'333333',4:'444444'}

for i in a:
    print i

它显示:

0
1
3
4

但我希望它显示:

4
3
1
0

那我该怎么办?

推荐答案

迭代顺序键是任意的.它们按顺序排列只是一个巧合.

The order keys are iterated in is arbitrary. It was only a coincidence that they were in sorted order.

>>> a = {0:'000000',1:'11111',3:'333333',4:'444444'}
>>> a.keys()
[0, 1, 3, 4]
>>> sorted(a.keys())
[0, 1, 3, 4]
>>> reversed(sorted(a.keys()))
<listreverseiterator object at 0x02B0DB70>
>>> list(reversed(sorted(a.keys())))
[4, 3, 1, 0]

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