How to merge dictionary with some lists from list-CodePudding

I have a list of dictionaries:

dictionary_list = [{'a':'string','b':'string','c':['string1','string2']},{'a':'string','b':'string','c':['string1','string2', 'string3']}]

and want to have all dict from list in one dictionary, but when I:

all_dict = {}
for d in dictionary_list:
    all_dict.update(d)
print(all_dict)

result is:

{'a':'string','b':'string','c':['string1','string2'],'a':'string','b':'string','c':['string1','string2', 'string3']}

could You help :)

CodePudding user response：

I think you're trying to merge the list values which you could do like this:

dictionary_list = [{'usterki_usuniete': 'some_string',
                    'pictures_usuniete': ['KATO152_AWARIA_1', 'KATO152_AWARIA_2', 'KATO152_AWARIA_3', 'KATO152_AWARIA_4', 'KATO152_AWARIA_7'],
                    'usterki_nieusuniete': 'some_string',
                    'pictures_nieusuniete': ['KATO152_AWARIA_5', 'KATO152_AWARIA_6']},
                   {'usterki_usuniete': 'some_string',
                    'pictures_usuniete': ['OPO1512_AWARIA_5'],
                    'usterki_nieusuniete': 'some_string',
                    'pictures_nieusuniete': ['OPO1512_AWARIA_1', 'OPO1512_AWARIA_2', 'OPO1512_AWARIA_3', 'OPO1512_AWARIA_4']}]

output = {}

for d in dictionary_list:
    for k, v in d.items():
        if isinstance(v, list):
            output.setdefault(k, []).extend(v)
        else:
            output[k] = v

print(output)

Output:

{'usterki_usuniete': 'some_string', 'pictures_usuniete': ['KATO152_AWARIA_1', 'KATO152_AWARIA_2', 'KATO152_AWARIA_3', 'KATO152_AWARIA_4', 'KATO152_AWARIA_7', 'OPO1512_AWARIA_5'], 'usterki_nieusuniete': 'some_string', 'pictures_nieusuniete': ['KATO152_AWARIA_5', 'KATO152_AWARIA_6', 'OPO1512_AWARIA_1', 'OPO1512_AWARIA_2', 'OPO1512_AWARIA_3', 'OPO1512_AWARIA_4']}

Note:

The problem with this could be when (if?) the values for keys such as usterki_nieusuniete are different in each sub-dictionary. With this code it would always be the last observed value which may not be what you want

CodePudding user response：

You need to provide keys for your dictionary, for example:

dictionary_list = [{'usterki_usuniete': 'some_string', 'pictures_usuniete': ['KATO152_AWARIA_1', 'KATO152_AWARIA_2', 'KATO152_AWARIA_3', 'KATO152_AWARIA_4', 'KATO152_AWARIA_7'], 'usterki_nieusuniete': 'some_string', 'pictures_nieusuniete': ['KATO152_AWARIA_5', 'KATO152_AWARIA_6']}, {'usterki_usuniete': 'some_string', 'pictures_usuniete': ['OPO1512_AWARIA_5'], 'usterki_nieusuniete': 'some_string', 'pictures_nieusuniete': ['OPO1512_AWARIA_1', 'OPO1512_AWARIA_2', 'OPO1512_AWARIA_3', 'OPO1512_AWARIA_4']}]

all_dict = {}
i = 0
for j in dictionary_list:
    all_dict[i] = j
    i =1
all_dict

Output:

{0: {'usterki_usuniete': 'some_string',
  'pictures_usuniete': ['KATO152_AWARIA_1',
   'KATO152_AWARIA_2',
   'KATO152_AWARIA_3',
   'KATO152_AWARIA_4',
   'KATO152_AWARIA_7'],
  'usterki_nieusuniete': 'some_string',
  'pictures_nieusuniete': ['KATO152_AWARIA_5', 'KATO152_AWARIA_6']},
 1: {'usterki_usuniete': 'some_string',
  'pictures_usuniete': ['OPO1512_AWARIA_5'],
  'usterki_nieusuniete': 'some_string',
  'pictures_nieusuniete': ['OPO1512_AWARIA_1',
   'OPO1512_AWARIA_2',
   'OPO1512_AWARIA_3',
   'OPO1512_AWARIA_4']}}