Generate excel file from list of nested dictionaries

I have list like this(simplified version):

data = [{'layer1': [{'idx': 'idx_102',
               'size': 8 },
               {'idx': 'idx_112',
               'size': 25 },
               {'idx': 'idx_142',
               'size': 10 }]
     },
    {'layer2': [{'idx': 'idx_125',
               'size': 28 },
               {'idx': 'idx_258',
               'size': 21 },
               {'idx': 'idx_658',
               'size': 12 }]
     },
    {'layer3': [{'idx': 'idx_158',
               'size': 78 }]
    }]

The structure of the excel file should be like this:

Can someone help, I am lost with Pandas

>Solution :

Use nested list with dict comprehensions:

L = [{**{'layer': k}, **x} for d in data for k, v in d.items() for x in v]

df = pd.DataFrame(L)
print (df)
    layer      idx  size
0  layer1  idx_102     8
1  layer1  idx_112    25
2  layer1  idx_142    10
3  layer2  idx_125    28
4  layer2  idx_258    21
5  layer2  idx_658    12
6  layer3  idx_158    78

Last if need remove duplicates:

df.loc[df['layer'].duplicated(), 'layer'] = ''
print (df)
    layer      idx  size
0  layer1  idx_102     8
1          idx_112    25
2          idx_142    10
3  layer2  idx_125    28
4          idx_258    21
5          idx_658    12
6  layer3  idx_158    78