def hierarchy(struct, path=None):
    if isinstance(struct, dict):
        path = path if path else '$'
        return set(
            child_path
                for key, obj   in struct.items()
                for child_path in hierarchy(obj, f'{path}.{key}')
        ).union(
            [path]
        )
    elif isinstance(struct, list):
        path = f'{path}[]' if path else '$[]'
        return set(
            child_path
                for obj        in struct
                for child_path in hierarchy(obj, path)
        ).union(
            [path]
        )
    else:
        return [path]



from itertools import chain

def hierarchy2(d):
    if isinstance(d, dict):
        return set(
            f'{k}.{x}' if x else k
                for k,v in d.items()
                for x in chain([''], hierarchy2(v))
        )
    elif isinstance(d, list):
        return set(
            v
                for l in d
                for v in hierarchy2(l)
                    if v
        )
    else:
        return set()



inpt = {
    '0': [
        ['abc', {'0a': 'test'}],
        ['def', {'0a': 'test'}],
        ['ghi', {'0b': 'test'}]
    ],
    '1': {
        '2': 'test',
        '3': {
            '4': 'test',
            '5': 'test'
        },
    },
    '6': [
        'test',
        {
            '7': 'test'
        },
        [
            {
                '8': 'test'
            },
            {
                '9': 'test'
            },
        ]
    ]
}
print('Example1\n')
out = sorted(hierarchy(inpt))
print(out)
print()
out = sorted(hierarchy2(inpt))
print(out)
print()
print()


inpt = [ 'test', {'test': 'test'}, [ {'test': 'test'} ] ]
print('Example2\n')
out = sorted(hierarchy(inpt))
print(out)
print()
out = sorted(hierarchy2(inpt))
print(out)
print()
print()



inpt={'boo': 'its', 'soo': 'your', 'roo': 'choice', 'qoo': 'this', 'fizz': 'is', 'buzz': 'very', 'yoyo': 'rambling', 'wazzw': 'lorem', 'bnn': 'ipsum', 'cc': [{'boo': 'fill', 'soo': 'ing', 'roo': 'in', 'qoo': 'the', 'fizz': 'words', 'buzz': 'here', 'yoyo': 'we', 'wazzw': 'go', 'nummm': 2, 'bsdfff': 3, 'hgdjgkk': 4, 'opu': 1, 'mnb': True}, {'boo': 'again', 'soo': 'loop', 'roo': 'de', 'qoo': 'loop', 'fizz': 'wowzers', 'buzz': 'try', 'yoyo': 'again', 'wazzw': 'how', 'nummm': 1, 'bsdfff': 7, 'hgdjgkk': 0, 'opu': 1, 'mnb': True}], 'soos': ['ya'], 'tyu': 'doin', 'dddd3': 'today'}
print('Example3\n')
out = sorted(hierarchy(inpt))
print(out)
print()
out = sorted(hierarchy2(inpt))
print(out)
print()
print()



inpt = {'l1': {'l2': {'l3': 'test'}}}
print('Example4\n')
out = sorted(hierarchy(inpt))
print(out)
print()
out = sorted(hierarchy2(inpt))
print(out)
print()
print()



inpt = [{'a': 0}, {'a': 1}, {'b': 0}]
print('Example5\n')
out = sorted(hierarchy(inpt))
print(out)
print()
out = sorted(hierarchy2(inpt))
print(out)
print()
print()