deap

Python DEAP - Getting the Pareto Front for every generation

I am using DEAP to run a multi objective optimization using eaSimple. The code returns the ParetoFront() after the last generation. Is there any way to get a set of ParetoFront() for each generation? I would like to see the evolution of the fronts with every generation.

Solution

  • Simply run one generation at a time. Each time, run the algorithm on the population that was output by the previous run.

    Something like

    ngen = 50
pop = toolbox.population(n=100)

for i in range(ngen):
    pop, logbook = algorithms.eaSimple(pop, toolbox, cxpb=0.5, mutpb=0.2, ngen=1)

    You just need to add whatever you are doing with the Pareto front to the above code.