在嵌套字典中将python中的字典值从str转换为int [英] Converting dictionary values in python from str to int in nested dictionary

问题描述

我目前有一个嵌套的字典，看起来像这样:

I currently have a nested dictionary which looks like this:

series = { 

'a': {'foo':'2', 'bar':'3', 'baz':'7', 'qux':'1'},
'b': {'foo':'6', 'bar':'4', 'baz':'3', 'qux':'0'},
'c': {'foo':'4', 'bar':'5', 'baz':'1', 'qux':'6'}
}

我正在尝试将字符串中的值转换为整数.

And I'm trying to convert the values from strings into integers.

我尝试过这种方法:

newseries = dict((k,int(v)) for k,v in series.items())

但是我得到的只是一条错误消息:

But all I get is an error message saying:

TypeError: int() argument must be a string, a bytes-like object or a number, not 'dict'

我在做什么错了?

推荐答案

在这种情况下，您必须更深入:

You have to go deeper in this case:

In [4]: {k: {kk: int(vv) for kk, vv in v.items()}
         for k, v in series.items()}
Out[4]: 
{'a': {'bar': 3, 'baz': 7, 'foo': 2, 'qux': 1},
 'b': {'bar': 4, 'baz': 3, 'foo': 6, 'qux': 0},
 'c': {'bar': 5, 'baz': 1, 'foo': 4, 'qux': 6}}

您自己的示例仅迭代系列的键，值对，该键具有(嵌套的) dict 值.

Your own example just iterates the key, value -pairs of series, which has (nested) dict values.

请注意，这不是通用解决方案.为此，您需要递归或堆栈.

Note that this is not a generic solution. For that you'd need recursion or a stack.

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