在特定关键字的嵌套字典中获取值的优雅方式？ [英] Elegant way to get values in nested dictionaries for a specific key?

问题描述

我在Python中有一个嵌套字典。我可以访问 A 元素：

  D [0] ['detLog'] [n] ['A'] 
  

其中n从0到长度的 detLog ...在Matlab中，我可以使用这样的东西：

  D [0] ['detLog'] [：] ['A'] 
  

：意思是所有元素。

在Python中有什么类似的东西？

解决方案

列表理解：

$在D [0] ['detLog']中，b $ b

  [d ['A'] d] 
  

对于使用Python的科学计算，您可能还需要查看 NumPy 和 SciPy ，特别是用于Matlab用户的NumPy 文档。

I have a nested dictionary in Python. I can access the A element like this:

D[0]['detLog'][n]['A']

where n is from 0 to the length of the detLog... In Matlab I could use something like this:

D[0]['detLog'][:]['A']

: meaning "for all elements".

Is there something similar in Python?

解决方案

Yes, use a list comprehension:

[d['A'] for d in D[0]['detLog']]

For scientific computing with Python, you may also want to look into NumPy and SciPy, specifically the NumPy for Matlab users documentation.

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