如何在 Python 中实现关联数组(不是字典)? [英] How to implement associative array (not dictionary) in Python?

问题描述

我尝试用 Python 打印字典:

I trying to print out a dictionary in Python:

Dictionary = {"Forename":"Paul","Surname":"Dinh"}
for Key,Value in Dictionary.iteritems():
  print Key,"=",Value

虽然Forename"项是最先列出的，但是Python中的字典似乎是按值排序的，所以结果是这样的:

Although the item "Forename" is listed first, but dictionaries in Python seem to be sorted by values, so the result is like this:

Surname = Dinh
Forename = Paul

如何以相同的代码顺序或添加项目时的顺序(不按值或键排序)打印这些?

How to print out these with the same order in code or the order when items are appended in (not sorted by values nor by keys)?

推荐答案

您可以使用元组列表(或列表列表).像这样:

You can use a list of tuples (or list of lists). Like this:

Arr= [("Forename","Paul"),("Surname","Dinh")]
for Key,Value in Arr: 
    print Key,"=",Value

Forename = Paul
Surname = Dinh

您可以使用以下方法制作字典:

you can make a dictionary out of this with:

Dictionary=dict(Arr)

正确排序的键是这样的:

And the correctly sorted keys like this:

keys = [k for k,v in Arr]

然后这样做:

for k in keys: print k,Dictionary[k]

但我同意您的问题的评论:在循环时按所需顺序对键进行排序会不会很容易?

but I agree with the comments on your question: Would it not be easy to sort the keys in the required order when looping instead?

(感谢 Rik Poggi)，OrderedDict 为您执行此操作:

(thank you Rik Poggi), OrderedDict does this for you:

od=collections.OrderedDict(Arr)
for k in od: print k,od[k]

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