Python中的词典列表 [英] List of dictionaries, in a dictionary - in Python

问题描述

我有一个案例，我需要以编程方式构建以下结构（是的，我知道.setdefault和defaultdict，但我无法得到我想要的）

I have a case where I need to construct following structure programmatically (yes I am aware of .setdefault and defaultdict but I can not get what I want)

我基本上需要一个字典，在循环中创建一个字典的字典。
开始时结构完全为空。

I basically need a dictionary, with a dictionary of dictionaries created within the loop. At the beginning the structure is completely blank.

结构示例（请注意，我想创建一个在代码中具有此结构的数组） / p>

structure sample (please note, I want to create an array that has this structure in the code!)

RULE = {
     'hard_failure': {
        4514 : {
           'f_expr' = 'ABC',
           'c_expr' = 'XF0',
     }
    }
   }

需要创建的伪代码：

...
self.rules = {}
for row in rows:
     a = 'hard_failure'
     b = row[0] # 4514
     c = row[1] # ABC
     d = row[2] # XF0
     # Universe collapse right after
     self.rules = ????
...   

上面的代码显然没有工作，因为我不知道该怎么做

The code above is obviously not working since I dont know how to do it!

推荐答案

例如，你发布的不是一个有效的python代码，我只能想象你正在尝试做这样的事情：

Example, that you've posted is not a valid python code, I could only imagine that you're trying to do something like this:

self.rules[a] = [{b:{'f_expr': c, 'c_expr': d}}]

这种方式 self.rules 是字典字典列表的字典。我敢打赌这样做更合理。

this way self.rules is a dictionary of a list of a dictionary of a dictionary. I bet there is more sane way to do this.

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