def sum_of_squares(self, mean):
        return Gauged.map_sum_of_squares(self.ptr, c_float(mean))
Must be overriden to return a list of tuples (value, verbose value)
dataset/ETHPy150Open chriso/gauged/gauged/structures/sparse_map.py/SparseMap.sum_of_squares--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/contrib/admin/filters.py/SimpleListFilter.lookups