A tiny clean python DictProxyObject from https://github.com/scikit-learn/scikit-learn/blob/master/sklearn/datasets/base.py.

dict_proxy_object.py

class DictProxyObject(dict):
    """Container object for datasets: dictionary-like object that
       exposes its keys as attributes."""

    def __init__(self, **kwargs):
        dict.__init__(self, kwargs)
        self.__dict__ = self