def eval_one_max(traj, individual):
    traj.f_add_result('$set.$.individual', list(individual))
    fitness = sum(individual)
    traj.f_add_result('$set.$.fitness', fitness)
    traj.f_store()  # We switched off automatic storing, so we need to store manually
    return (fitness,)  # DEAP wants a tuple here!
subsets should return all subsets descending from a set
dataset/ETHPy150Open SmokinCaterpillar/pypet/examples/example_19_using_deap.py/eval_one_max--crossover with--dataset/ETHPy150Open biocore/scikit-bio/skbio/tree/tests/test_tree.py/TreeTests.test_subsets