class Trainer:
def __init__(self):
self.chromosomes = [Chromosome([random.uniform(-1, 1) for _ in range(4)]) for _ in range(POPULATION)]
def select(self):
"""Simulate the selection genetic operator."""
self.chromosomes.sort(key=lambda chromosome: chromosome.fitness)
self.chromosomes = self.chromosomes[::-1][:POPULATION // 2]
def crossover(self, pool):
"""Simulate the crossover genetic operator."""
parents = [random.choice(pool), random.choice(pool)]
children = []
if random.random() < CROSSOVER_CHANCE:
i = random.randint(0, 3)
children.append(Chromosome(parents[0].chromosome[:i] + parents[1].chromosome[i:]))
children.append(Chromosome(parents[1].chromosome[:i] + parents[0].chromosome[i:]))
else:
children.append(Chromosome(parents[0].chromosome[:]))
children.append(Chromosome(parents[1].chromosome[:]))
return children
def mutate(self, chromosome):
"""Simulate the mutation genetic operator."""
for i in range(4):
if random.random() < MUTATION_CHANCE:
chromosome.chromosome[i] = random.uniform(-1, 1)
def get_fitness(self, chromosome, seed):
"""Return the fitness of a given chromosome."""
agent = Agent(chromosome.chromosome)
game = Tetris(WIDTH, HEIGHT, 0, 0, seed) # simulate a game of Tetris
while game.state != 0:
agent.play(game.current_tetromino, game.grid)(game)
game.update()
chromosome.fitness = game.score.score
print(f'Fitness: {chromosome.fitness}')
return chromosome
def simulate(self):
"""Return an optimal set of weights for an agent playing a game of Tetris."""
for i in range(GENERATIONS):
print(f'=== Generation {i} ===\n')
seed = random.randint(0, 99)
self.chromosomes = Parallel(n_jobs=-1)(delayed(self.get_fitness)(chromosome, seed) for chromosome in self.chromosomes)
self.select()
pool = self.chromosomes[:]
while len(self.chromosomes) < POPULATION:
chromosomes = self.crossover(pool)
for chromosome in chromosomes:
self.mutate(chromosome)
self.chromosomes.extend(chromosomes)
print()
return max(self.chromosomes, key=lambda chromosome: chromosome.fitness).chromosome
nnc.sync()
tides = process_point(i,nnc)
write_point(nnc,i,tides)
else:
from joblib import Parallel, delayed
elev = ncv['elev'][:]
# if timeseries or chunked version
# (hand over subarray instead of timeseries)
if False:
result = Parallel(n_jobs=n_jobs)(delayed(process_timeseries_parallel)(elev[:,i]) for i in tqdm(range(inum),ascii=True))
else:
chunksize=100
chunked_result = Parallel(n_jobs=n_jobs)(delayed(process_chunk_parallel)(elev[:,i*chunksize:min(inum,(i+1)*chunksize)]) for i in tqdm(range(int(inum/chunksize)+1),ascii=True))
result=[]
for res in chunked_result:
result.extend(res)
# save result as pickle
with open('result.pickle','wb') as f:
pickle.dump(result,f)
# write to netcdf
write_result(result,nnc)
# close netcdf
nnc.close()
