Python字典，如何保持键/值与声明相同的顺序？ [英] Python dictionary, how to keep keys/values in same order as declared?

问题描述

对Python而言，这是新的，并且有关于词典的问题。我有一个我以特定顺序宣布的字典，希望始终保持这样的顺序。键/值不能真正按照它们的价值保持顺序，我只是按照我宣布的顺序。

所以如果我有字典：

  d = {'ac'：33，'gw'：20，'ap'：102，'za' 321，'bs'：10} 
  

如果我查看或迭代不是这样的顺序通过它，有什么办法确保Python将保持明确的命令，我声明了键/值？

使用Python 2.6

解决方案

 从集合导入OrderedDict 
 OrderedDict（（word，True） b  

包含

  OrderedDict（[（'He'，True），（'will'，True），（'be'，True），（'the'，True），（'winner'，True）]）
  

如果值为 True （或任何其他不可变对象）你也可以使用：

  OrderedDict.fromkeys（words，真的）
  

new to Python and had a question about dictionaries. I have a dictionary that I declared in a particular order and want to keep it in that order all the time. The keys/values can't really be kept in order based on their value, I just want it in the order that I declared it.

So if I have the dictionary:

d = {'ac':33, 'gw':20, 'ap':102, 'za':321, 'bs':10}

It isn't in that order if I view it or iterate through it, is there any way to make sure Python will keep the explicit order that I declared the keys/values in?

Using Python 2.6

解决方案

from collections import OrderedDict
OrderedDict((word, True) for word in words)

contains

OrderedDict([('He', True), ('will', True), ('be', True), ('the', True), ('winner', True)])

If the values are True (or any other immutable object), you can also use:

OrderedDict.fromkeys(words, True)

这篇关于Python字典，如何保持键/值与声明相同的顺序？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！