Object-like attribute access for nested dictionary

I'm utilising a package which returns a nested dictionary. It feels awkward to access this return object in my class methods with the dictionary syntax, when everything else is in object syntax. Searching has brought me to the bunch / neobunch packages, which seems to achieve what I'm after. I've also seen namedtuples suggested but these do not easily support nested attributes and most solutions rely on using dictionaries within the namedtuple for nesting.

What would be a more natural way of achieving this?

data = {'a': 'aval', 'b': {'b1':{'b2a':{'b3a':'b3aval','b3b':'b3bval'},'b2b':'b2bval'}} }

print(data['b']['b1']['b2a']['b3b'])  # dictionary access
# print(data.b.b1.b2a.b3b)  # desired access

import neobunch
data1 = neobunch.bunchify(data)
print(data1.b.b1.b2a.b3b)