def add_to_dict(data, key, value):
    if key in data:
        data[key].add(value)
    else:
        data[key] = set([value])
Regular expresion that will be used to filter the nodes that shouldn't show up in the
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/Django-1.6.10/django/db/models/sql/query.py/add_to_dict--crossover with--dataset/ETHPy150Open acil-bwh/SlicerCIP/Scripted/CIP_LesionModel/CIP_LesionModel.py/CIP_LesionModelLogic.INPUTVOLUME_FILTER_REGEXPR