Nested lists to nested dicts

Question

I've a list with master keys and a list of list of lists, where the first value of each enclosed list (like 'key_01') shall be a sub key for the corresponding values (like 'val_01', 'val_02'). The data is shown here:

master_keys = ["Master_01", "Master_02", "Master_03"]
data_long = [[['key_01','val_01','val_02'],['key_02','val_03','val_04'], ['key_03','val_05','val_06']],
           [['key_04','val_07','val_08'], ['key_05','val_09','val_10'], ['key_06','val_11','val_12']],
           [['key_07','val_13','val_14'], ['key_08','val_15','val_16'], ['key_09','val_17','val_18']]]

I would like these lists to be combined into a dictionary of dictionaries, like this:

master_dic = {
"Master_01": {'key_01':['val_01','val_02'],'key_02': ['val_03','val_04'], 'key_03': ['val_05','val_06']}, 
"Master_02": {'key_04': ['val_07','val_08'], 'key_05': ['val_09','val_10'], 'key_06': ['val_11','val_12']}, 
"Master_03": {'key_07': ['val_13','val_14'], ['key_08': ['val_15','val_16'], 'key_09': ['val_17','val_18']}
}

What I've got so far is the sub dict:

import itertools

master_dic = {}
servant_dic = {}
keys = []
values = []
for line in data_long:
    for item in line:
        keys.extend(item[:1])
        values.append(item[1:])
servant_dic = dict(itertools.izip(keys, values))

Which puts out a dictionary, as expected.

servant_dic = {
'key_06': ['val_11','val_12'], 'key_04': ['val_08','val_07'], 'key_05': ['val_09','val_10'], 
'key_02': ['val_03','val_04'], 'key_03': ['val_05','val_06'], 'key_01': ['val_01','val_02']
 }

The problem is, that if I want to add the master_keys to this dictionary, so I get the wanted result, I'd have to do this in a certain order, which would be possible, if each line had a counter like this:

enumerated_dic =
{
0: {'key_01':['val_01','val_02'],'key_02': ['val_03','val_04'], 'key_03': ['val_05','val_06']}, 
1: {'key_04': ['val_07','val_08'], 'key_05': ['val_09','val_10'], 'key_06': ['val_11','val_12']}, 
2: {'key_07': ['val_13','val_14'], ['key_08': ['val_15','val_16'], 'key_09': ['val_17','val_18']}
}

I'd love to do this with enumerate(), while each line of the servant_dic is build, but can't figure out how. Since afterwards, i could simply replace the counters 0, 1, 2 etc. with the master_keys.

Thanks for your help.

Answer 1

master_keys = ["Master_01", "Master_02", "Master_03"]
data_long = [[['key_01','val_01','val_02'],['key_02','val_03','val_04'], ['key_03','val_05','val_06']],
           [['key_04','val_07','val_08'], ['key_05','val_09','val_10'], ['key_06','val_11','val_12']],
           [['key_07','val_13','val_14'], ['key_08','val_15','val_16'], ['key_09','val_17','val_18']]]


_dict = {}

for master_key, item in zip(master_keys, data_long):
    _dict[master_key] = {x[0]: x[1:] for x in item}

print _dict