Named tuple output for dataset classes

[jonasteuwen]

Is your feature request related to a problem? Please describe.
Output of datasets should be named tuples

Describe the solution you'd like
E.g.

def create_namedtuple_from_dict(obj):
    if isinstance(obj, dict):
        fields = sorted(obj.keys())
        namedtuple_type = namedtuple(
            typename="GenericObject",
            field_names=fields,
            rename=True,
        )
        field_value_pairs = OrderedDict((str(field), create_namedtuple_from_dict(obj[field])) for field in fields)
        try:
            return namedtuple_type(**field_value_pairs)
        except TypeError:
            # Cannot create namedtuple instance so fallback to dict (invalid attribute names)
            return dict(**field_value_pairs)
    elif isinstance(obj, (list, set, tuple, frozenset)):
        return [create_namedtuple_from_dict(item) for item in obj]
    else:
        return obj

[github-actions]

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