Can I use more than one mutation function in GP?

Question

I want to use more than one mutation method in GP, for example both mutUniform and mutEmphemeral. But all the algorithm can only receive one parameter. Is there method can solve this?

Answer 1

Assuming you have already defined mutUniform and mutEmphemeral, you can define a new mutation function that runs both mutations, and register that new function to your toolbox.

This would look something along the lines of

def mutMyWay(individual, mutpb, uniform_parameters, emphemeral_parameters):
    if random.random()<mutpb:
        individual = mutUniform(individual, *uniform_parameters)
        individual = mutEmphemeral(individual, *emphemeral_parameters)

toolbox.register('mutate', mutMyWay)