def aggregates(self):
    return list(self._aggregates)
Dictionaries should be indexed by attributes, not by keys. This was
dataset/ETHPy150Open agoragames/torus/torus/configuration.py/Configuration.aggregates--crossover with--dataset/ETHPy150Open ipython/ipython-py3k/IPython/utils/tests/test_wildcard.py/Tests.test_dict_attributes