使用相同的键将两个词典组合成一个词典? [英] Combining two dictionaries into one with the same keys?

问题描述

我在这里浏览了一些问题，但这些问题似乎都不是我的问题.假设我有2个字典，它们是dict1

I've looked through a few of the questions here and none of them seem to be exactly my problem. Say I have 2 dictionaries, and they are dict1

{'A': 25 , 'B': 41, 'C': 32}

和字典2

{'A':21, 'B': 12, 'C':62}

我正在编写一个程序，需要将它们组合成一个字典finaldict

I'm writing a program where I need to combine these to one dictionary finaldict

{'A': [25 , 21], 'B': [41, 12], 'C': [32, 62]}

我们非常感谢您的帮助，我一直在努力，但现在已经一无所获

Any help is much appreciated, I've been working on this and getting nowhere for a while now

推荐答案

这是通用版本.即使键中只有键，它也可以用来创建一个以值作为列表的字典.

This is a generic version. This can be used to create a dictionary with values as a list, even if the key is present in only one of them.

dic1 = {'A': 25, 'B': 41, 'C': 32}
dic2 = {'A': 21, 'B': 12, 'C': 62}
result = {}
for key in (dic1.viewkeys() | dic2.keys()):
    if key in dic1: result.setdefault(key, []).append(dic1[key])
    if key in dic2: result.setdefault(key, []).append(dic2[key])

print result

输出

{'A': [25, 21], 'C': [32, 62], 'B': [41, 12]}

如果您使用的是Python 3，则必须像这样更改for循环.感谢Martijn:)

If you are using Python 3, for loop has to be changed like this. Thanks to Martijn :)

for key in (dic1.keys() | dic2.keys()):

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