使用相同的键合并两个字典，但将其添加为另一个值(而不是替换) [英] Merge two dicts with the same keys but add as another value (not replace)

问题描述

此似乎显示了一个附加到数组而不向字典添加另一个值的示例

This seems to shown an example of appending to an array, not adding another value to a dict.

dict_1 = {a:{价格:4000}，b:{价格:14000}}

dict_2 = {a:{折扣:0100}，b:{折扣:0400}}

我想将它们合并为:

merged_dict: { a: {
                   price: 4000, 
                   discount: 0100
                  }, 
               b: {
                   price: 14000, 
                   discount: 0400
               } 
              }

如何实现?两个字典将始终具有相同的键.

How to achieve that? Both dictionaries will always have the same keys.

推荐答案

字典理解将解决此问题(我从问题中正确格式化了字典定义，并使用Python 3.8.0进行了测试):

A dictionary comprehension will solve this (I correctly formatted your dictionary definitions from the question, tested with Python 3.8.0):

>>> dict_1 = {'a': {'price': 4000}, 'b': {'price': 14000} }
>>> dict_2 = {'a': {'discount': 100}, 'b': {'discount': 400} }
>>> merged_dict = {k: { **dict_1[k], **dict_2[k] } for k in dict_2.keys()}
>>> merged_dict
{'a': {'price': 4000, 'discount': 100}, 'b': {'price': 14000, 'discount': 400}}

这篇关于使用相同的键合并两个字典，但将其添加为另一个值(而不是替换)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！