def __len__(self):
        return len(self.children)
XMLRPC call to register client hostname and PID as starting_up
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/utils/tree.py/Node.__len__--crossover with--dataset/ETHPy150Open cjlee112/pygr/pygr/coordinator.py/Coordinator.register_client