在python字典中获取具有最大嵌套键的键 [英] Get the key with the maximum nested key in a python dictionary

问题描述

我有这样的字典:

my_dictionary = {
      'key1': {'a': 1, 'b': 1, 'c': 10}, 
      'key2': {'a': 1, 'b': 1, 'c': 11}, 
      'key3': {'a': 1, 'b': 1, 'c': 12}
}

如何比较此字典的'c'子项，找到最大的子项，并返回该字典的相应父项(在这种情况下，我想输出'key3'，因为它的'c'键是最高的) .谢谢！

How can I compare the 'c' subkeys of this dictionary, find the greatest one, and return the corresponding parent key of that dictionary (in this case I want to output 'key3' as it's 'c' key is highest). Thanks!

推荐答案

max (可选)接受一个可调用的参数来修改比较:

max optionally accepts a callable argument for modifying the comparison:

>>> d
{'key1': {'a': 1, 'b': 1, 'c': 10},
 'key2': {'a': 1, 'b': 1, 'c': 11},
 'key3': {'a': 1, 'b': 1, 'c': 12}}
>>> max(d, key=lambda v: d[v]['c'])
'key3'

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