Add method to individual in DEAP

hash.py

from deap import base
from deap import creator


def hash_ind_list(self):
    return hash(tuple(self))

creator.create("FitnessMin", base.Fitness, weights=(-1.0,))
creator.create("Individual", list, fitness=creator.FitnessMin, __hash__=hash_ind_list)

ind1 = creator.Individual([1,2,3,4,5])
ind2 = creator.Individual([1,2,3,4,5])
ind3 = creator.Individual([1,3,4,5,6])

pop = set([ind1, ind2, ind3])
print(pop)
print(len(pop))