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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create_spot_nodes(self):
 """Create spot nodes. """

        self.create_stack(
            self.spot_nodes_name,
            'amazon-spot-nodes.yaml',
            parameters=define_parameters(
                ClusterName=self.cluster_name,
                Subnets=self.subnet_ids,
                NodeInstanceProfile=self.node_instance_profile,
                NodeInstanceRole=self.node_instance_role,
                NodeSecurityGroup=self.node_security_group,

            )
        )