ecspy 0.7

Usage Example

from random import Random
from time import time
from ecspy import ec
from ecspy import terminators
from ecspy import observers


def generate_binary(random, args):
    bits = args.get('num_bits', 8)
    return [random.choice([0, 1]) for i in xrange(bits)]

def evaluate_binary(candidates, args):
    fitness = []
    base = args.get('base', 2)
    for cand in candidates:
        num = 0
        exp = len(cand) - 1
        for c in cand:
            num += c * (base ** exp)
            exp -= 1
        fitness.append(num)
    return fitness

rand = Random()
rand.seed(int(time()))
ga = ec.GA(rand)
ga.observer = observers.screen_observer
ga.terminator = terminators.evaluation_termination
final_population = ga.evolve(evaluator=evaluate_binary,
                             generator=generate_binary,
                             max_evaluations=1000,
                             num_elites=1,
                             pop_size=100,
                             num_bits=10)
for individual in final_population:
    print(individual)