def __init__(self, duplicate_count=0, **kwargs):
        super(PrimaryKeyCheck, self).__init__(**kwargs)
        self.duplicate_count = duplicate_count
List all the nodes for a given chassis.
dataset/ETHPy150Open coursera/dataduct/dataduct/qa/primary_key_check.py/PrimaryKeyCheck.__init__--crossover with--dataset/ETHPy150Open openstack/python-ironicclient/ironicclient/v1/chassis.py/ChassisManager.list_nodes