test_population.py 文件源码

def test_breed_amount_works(self):
        pop1 = Population(chromosomes=self.chromosomes, eval_function=self.eval_func)
        pop1.survive(n=50).breed(parent_picker=lambda population: choices(population, k=2),
                                 combiner=lambda mom, dad: (mom + dad) / 2)
        assert len(pop1) == 200
        pop2 = Population(chromosomes=self.chromosomes, eval_function=self.eval_func)
        pop2.survive(n=50).breed(parent_picker=lambda population: choices(population, k=2),
                                 combiner=lambda mom, dad: (mom + dad) / 2, population_size=400)
        assert len(pop2) == 400
        assert pop2.intended_size == 400