def __nonzero__(self):
        return bool(self.children)
Return list of required attributes for this type
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/utils/tree.py/Node.__nonzero__--crossover with--dataset/ETHPy150Open scanny/python-pptx/lab/parse_xsd/parse_xsd.py/ComplexType.required_attributes