def set_best(self):
self._best_fitness = Fitness.calculate(self.best_position)
for particle in self.swarm:
this_fitness = Fitness.calculate(particle.position)
if this_fitness < self._best_fitness:
self._best_fitness = this_fitness
self.best_position = copy.deepcopy(particle.position)
def __init__(self, position):
self._position = position
self._dimensions = len(position)
self._best_position = position
self._best_fitness = Fitness.calculate(position)
self._velocity = [
self.get_random_velocity() for _ in range(self._dimensions)
]
def _update_best_position(self):
new_fitness = Fitness.calculate(self._position)
if new_fitness < self._best_fitness:
self._best_fitness = new_fitness
self._best_position = self._position