如何保留python字典中项目的顺序? [英] How to preserve ordering of items in a python dictionary?

问题描述

我有一本这样的字典:

a = {'first': 1, 'second': 2, 'third': 3}

否，当我打印时，它以非常随机的顺序打印.而我需要它来始终保留订单.我该如何在python中进行此操作?

No when I print it prints in an very random order. Whereas I need it to preserve the order always. How can I go about doing this in python???

推荐答案

使用OrderedDict类.下面的示例.

Use OrderedDict class. Example below.

from collections import OrderedDict

dict=OrderedDict()
dict['first']=1
dict['second']=2
dict['third']=3
dict

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