import functools

@functools.singledispatch
def find_path_to(obj, target):
    if obj == target:
        yield ()

@find_path_to.register(list)
def _(seq, target):
    for idx, item in enumerate(seq):
        for path in find_path_to(item, target):
            yield (idx,) + path

@find_path_to.register(dict)
def _(d, target):
    for key, value in d.items():
        for path in find_path_to(value, target):
            yield (key,) + path

data = [1, 2, 3, {4: 5, 6: 2, 7: [[[[[[2]]]]]]}]
for path in find_path_to(data, 2):
    print(path)