将多个列表映射到字典

问题描述：

我有5个列表，我想将它们映射到分层字典。

I have 5 lists and I want to map them to a hierarchical dictionary.

让我们说：

temp = [25, 25, 25, 25]
volt = [3.8,3.8,3.8,3.8]
chan = [1,1,6,6]
rate = [12,14,12,14]
power = [13.2,15.3,13.8,15.1]

和我想要的字典是这样的：

and what I want as my dictionary is this:

{25:{3.8:{1:{12:13.2,14:15.3},6:{12:13.8,14:15.1}}}}

基本上字典结构是：

{temp:{volt:{chan:{rate:power}}}}

我尝试使用zip功能，但在这种情况下没有帮助，因为在顶级列表中重复的值

I tried using the zip function but it does not help in this case because of the repeated values in the list at the top level

答

这只是稍微测试一下，但它似乎是诀窍。基本上， f 是，创建一个 defaultdict defaultdicts 。

This is only slightly tested, but it seems to do the trick. Basically, what f does, is to create a defaultdict of defaultdicts.

f = lambda: collections.defaultdict(f)
d = f()
for i in range(len(temp)):
    d[temp[i]][volt[i]][chan[i]][rate[i]] = power[i]

示例：

>>> print d[25][3.8][6][14]
15.1