How can I turn the following list:

[{'xx1': {'test1': 8}}, {'xx1': {'test3': 2}}, {'yy2': {'test1': 5}}, {'yy2': {'test5': 6}}]

into

[{'xx1' : {'test1': 8, 'test3':2}, 'yy2' : {'test1': 5, 'test5': 6}}]

What is the syntactically cleanest way to accomplish this? Or, how can it be done by using reduce()?

Thanks for any help!!

CodePudding user response：

something like the below

from collections import defaultdict

data = defaultdict(dict)
lst = [{'xx1': {'test1': 8}}, {'xx1': {'test3': 2}}, {'yy2': {'test1': 5}}, {'yy2': {'test5': 6}}]

for entry in lst:
    for k, v in entry.items():
        kk, vv = next(iter(v.items()))
        data[k][kk] = vv
print(data)

output

defaultdict(<class 'dict'>, {'xx1': {'test1': 8, 'test3': 2}, 'yy2': {'test1': 5, 'test5': 6}})

CodePudding user response：

You can try this:

def fnd_val(lst_dct, key):
    lst = ([ld[key] for ld in lst_dct if key in ld])
    return dict(j for i in lst for j in i.items())
            
lst_dct = [{'xx1': {'test1': 8}}, {'xx1': {'test3': 2}}, {'yy2': {'test1': 5}}, {'yy2': {'test5': 6}}]      
out = {}
for ld in lst_dct:
    for k,v in ld.items():
        out[k] = fnd_val(lst_dct, k)

print(out)

Output:

{'xx1': {'test1': 8, 'test3': 2}, 'yy2': {'test1': 5, 'test5': 6}}