python.samplers.DiscreteSampler Node1 python.samplers.Discrete Sampler Node4 python.samplers.CyclicSeq Sampler + sequence + index + __init__() + shoot() Node1->Node4 Node5 python.samplers.RandomSeq Sampler + sequence + __init__() + shoot() Node1->Node5 Node2 python.samplers.Sampler + shoot() + __call__() Node2->Node1 Node3 object Node3->Node2