allow pattern matching nested dict

[joetsoi]

if the pattern matches a dict and it's the last pattern it should return the dict flattened?
matching ['^layer1$', '^layer2$'] should return 'some value, some value2'

{
    'layer1': {
        'layer2':
            'some key':' 'some value'
            'some key2':' 'some value2'
        }
    }
}