如何获得Python中两个字典之间的区别？ [英] How to get the difference between two dictionaries in Python?

问题描述

我有两个字典。我需要找到两者之间的区别，这应该给我键和值。

I have two dictionaries. I need to find the difference between the two which should give me both key and value.

我已经搜索并找到了一些插件/软件包，例如datadiff，dictdiff-master，但是当我在Python 2.7中尝试过，它说没有定义这样的模块。

I have searched and found some addons/packages like datadiff, dictdiff-master but when I try it in Python 2.7 it says no such module defined.

我在这里使用set。

I used set here.

first_dict = {}
second_dict = {}

value = set(second_dict)-set(first_dict)
print value

output >>> set（['SCD- 3547'，'SCD-3456']）

output >>>set(['SCD-3547', 'SCD-3456'])

我只获得密钥，甚至需要获取值。

I am getting only key, I need to even get the values.

推荐答案

使用字典理解功能尝试以下代码段：

Try the following snippet, using a dictionary comprehension:

value = { k : second_dict[k] for k in set(second_dict) - set(first_dict) }

In上面的代码我们找到键的差异 ，然后使用相应的值重建 dict 。

In the above code we find the difference of the keys and then rebuild a dict taking the corresponding values.

这篇关于如何获得Python中两个字典之间的区别？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！