def __init__(self,
n_in_channel,
nclass,
attention=False,
activation="Relu",
dropout=0,
train_cnn=True,
rnn_type='BGRU',
n_RNN_cell=64,
n_layers_RNN=1,
dropout_recurrent=0,
**kwargs):
super(CRNN, self).__init__()
self.attention = attention
self.cnn = CNN(n_in_channel, activation, dropout, **kwargs)
if not train_cnn:
for param in self.cnn.parameters():
param.requires_grad = False
self.train_cnn = train_cnn
if rnn_type == 'BGRU':
self.rnn = BidirectionalGRU(self.cnn.nb_filters[-1],
n_RNN_cell,
dropout=dropout_recurrent,
num_layers=n_layers_RNN)
else:
NotImplementedError("Only BGRU supported for CRNN for now")
self.dropout = nn.Dropout(dropout)
self.dense = nn.Linear(n_RNN_cell * 2, nclass)
self.sigmoid = nn.Sigmoid()
if self.attention:
self.dense_softmax = nn.Linear(n_RNN_cell * 2, nclass)
self.softmax = nn.Softmax(dim=-1)
def get_model(state, args, init_model_name=None):
if init_model_name is not None and os.path.exists(init_model_name):
model, optimizer, state = load_model(init_model_name,
return_optimizer=True,
return_state=True)
else:
if "conv_dropout" in args:
conv_dropout = args.conv_dropout
else:
conv_dropout = cfg.conv_dropout
cnn_args = {1}
if args.fixed_segment is not None:
frames = cfg.frames
else:
frames = None
nb_layers = 4
cnn_kwargs = {
"activation": cfg.activation,
"conv_dropout": conv_dropout,
"batch_norm": cfg.batch_norm,
"kernel_size": nb_layers * [3],
"padding": nb_layers * [1],
"stride": nb_layers * [1],
"nb_filters": [16, 16, 32, 65],
"pooling": [(2, 2), (2, 2), (1, 4), (1, 2)],
"aggregation": args.agg_time,
"norm_out": args.norm_embed,
"frames": frames,
}
nb_frames_staying = cfg.frames // (2**2)
model = CNN(*cnn_args, **cnn_kwargs)
# model.apply(weights_init)
state.update({
'model': {
"name": model.__class__.__name__,
'args': cnn_args,
"kwargs": cnn_kwargs,
'state_dict': model.state_dict()
},
'nb_frames_staying': nb_frames_staying
})
if init_model_name is not None:
save_model(state, init_model_name)
pytorch_total_params = sum(p.numel() for p in model.parameters()
if p.requires_grad)
LOG.info(
"number of parameters in the model: {}".format(pytorch_total_params))
return model, state
def __init__(self,
w2v_cfg,
n_in_channel,
nclass,
attention=False,
activation="Relu",
dropout=0,
train_cnn=True,
rnn_type='BGRU',
n_RNN_cell=64,
n_layers_RNN=1,
dropout_recurrent=0,
cnn_integration=False,
**kwargs):
super(WCRNN, self).__init__()
self.w2v = w2v_encoder(w2v_cfg) #Wav2Vec2Config)
#self.w2v = Wav2VecEncoder(Wav2Vec2SedConfig, None)
self.pooling = nn.Sequential(nn.MaxPool2d((1, 4), (1, 4)))
self.n_in_channel = n_in_channel
self.attention = attention
self.cnn_integration = cnn_integration
n_in_cnn = n_in_channel
if cnn_integration:
n_in_cnn = 1
self.cnn = CNN(n_in_cnn, activation, dropout, **kwargs)
if not train_cnn:
for param in self.cnn.parameters():
param.requires_grad = False
self.train_cnn = train_cnn
if rnn_type == 'BGRU':
nb_in = self.cnn.nb_filters[-1]
if self.cnn_integration:
# self.fc = nn.Linear(nb_in * n_in_channel, nb_in)
nb_in = nb_in * n_in_channel
self.rnn = BidirectionalGRU(nb_in,
n_RNN_cell,
dropout=dropout_recurrent,
num_layers=n_layers_RNN)
else:
NotImplementedError("Only BGRU supported for CRNN for now")
self.dropout = nn.Dropout(dropout)
self.dense = nn.Linear(n_RNN_cell * 2, nclass)
self.sigmoid = nn.Sigmoid()
if self.attention:
self.dense_softmax = nn.Linear(n_RNN_cell * 2, nclass)
self.softmax = nn.Softmax(dim=-1)
def build_model(model_name, **kwargs):
if model_name == 'CNN':
return CNN(**kwargs)
elif model_name == 'DAE_CNN':
return DAE_CNN(**kwargs)
else:
raise Exception('Model unknown %s' % model_name)
def main(_):
#train('data/', 'data.csv','trained_models/')
X,Y,_ = get_data_info('data/', 'data.csv')
# read input tensor
X = get_tensor(X).astype(np.float32)
models = {}
models['pants'] = CNN('pants')
texture = np.array([
[[1,0,0], [1,0,0], [1,0,0],[1,0,0], [1,0,0], [1,0,0],[1,0,0], [1,0,0], [1,0,0], [1,0,0]],
[[1,0,0], [1,0,0], [1,0,0],[1,0,0], [1,0,0], [1,0,0],[1,0,0], [1,0,0], [1,0,0], [1,0,0]],
[[1,0,0], [1,0,0], [1,0,0],[1,0,0], [1,0,0], [1,0,0],[1,0,0], [1,0,0], [1,0,0], [1,0,0]],
[[1,0,0], [1,0,0], [1,0,0],[1,0,0], [1,0,0], [1,0,0],[1,0,0], [1,0,0], [1,0,0], [1,0,0]],
[[1,0,0], [1,0,0], [1,0,0],[1,0,0], [1,0,0], [1,0,0],[1,0,0], [1,0,0], [1,0,0], [1,0,0]],
[[1,0,0], [1,0,0], [1,0,0],[1,0,0], [1,0,0], [1,0,0],[1,0,0], [1,0,0], [1,0,0], [1,0,0]],
[[1,0,0], [1,0,0], [1,0,0],[1,0,0], [1,0,0], [1,0,0],[1,0,0], [1,0,0], [1,0,0], [1,0,0]],
[[1,0,0], [1,0,0], [1,0,0],[1,0,0], [1,0,0], [1,0,0],[1,0,0], [1,0,0], [1,0,0], [1,0,0]],
[[0,0,1], [0,0,1], [0,0,1],[0,0,1], [0,0,1], [0,0,1],[0,0,1], [0,0,1], [0,0,1], [0,0,1]],
[[0,0,1], [0,0,1], [0,0,1],[0,0,1], [0,0,1], [0,0,1],[0,0,1], [0,0,1], [0,0,1], [0,0,1]],
[[0,0,1], [0,0,1], [0,0,1],[0,0,1], [0,0,1], [0,0,1],[0,0,1], [0,0,1], [0,0,1], [0,0,1]],
[[0,0,1], [0,0,1], [0,0,1],[0,0,1], [0,0,1], [0,0,1],[0,0,1], [0,0,1], [0,0,1], [0,0,1]],
[[0,0,1], [0,0,1], [0,0,1],[0,0,1], [0,0,1], [0,0,1],[0,0,1], [0,0,1], [0,0,1], [0,0,1]],
[[0,0,1], [0,0,1], [0,0,1],[0,0,1], [0,0,1], [0,0,1],[0,0,1], [0,0,1], [0,0,1], [0,0,1]],
[[0,0,1], [0,0,1], [0,0,1],[0,0,1], [0,0,1], [0,0,1],[0,0,1], [0,0,1], [0,0,1], [0,0,1]]
],dtype=np.float32)
texture_swap(texture, labels()[0], models, X[0][:,:,:3])
def train(datafolder, datafile, modelfolder):
'''
@param datafolder {string} the path to the folder with dataset labels i.e. db/data/
@param datafile {string} the name of the file with dataset labels, no path
@param modelfolder {string} the path to folder where models should be stored
@return dict{} dictionary of models for each label in mlfashion.labels()
'''
models = {}
X,Y,_ = get_data_info(datafolder, datafile)
# read input tensor
X = get_tensor(X).astype(np.float32)
for label in labels():
models[label] = CNN(label)
# create separate thread or process
# get output tensor
print('Training for ' + label)
T = get_output_tensor(Y, label).astype(np.float32)
train_segmentation(models[label], X, T, modelfolder)
models[label].save(modelfolder + 'safesave/' + label + '.ckpt')
models[label].save(modelfolder + label + '.ckpt')
del T
# end of part in parallel
return models
def __init__(self, env, args, device='cpu'):
"""
Instantiate an NEC Agent
----------
env: gym.Env
gym environment to train on
args: args class from argparser
args are from from train.py: see train.py for help with each arg
device: string
'cpu' or 'cuda:0' depending on use_cuda flag from train.py
"""
self.environment_type = args.environment_type
self.env = env
self.device = device
# Hyperparameters
self.epsilon = args.initial_epsilon
self.final_epsilon = args.final_epsilon
self.epsilon_decay = args.epsilon_decay
self.gamma = args.gamma
self.N = args.N
# Transition queue and replay memory
self.transition_queue = []
self.replay_every = args.replay_every
self.replay_buffer_size = args.replay_buffer_size
self.replay_memory = ReplayMemory(self.replay_buffer_size)
# CNN for state embedding network
self.frames_to_stack = args.frames_to_stack
self.embedding_size = args.embedding_size
self.in_height = args.in_height
self.in_width = args.in_width
self.cnn = CNN(self.frames_to_stack, self.embedding_size,
self.in_height, self.in_width).to(self.device)
# Differentiable Neural Dictionary (DND): one for each action
self.kernel = inverse_distance
self.num_neighbors = args.num_neighbors
self.max_memory = args.max_memory
self.lr = args.lr
self.dnd_list = []
for i in range(env.action_space.n):
self.dnd_list.append(
DND(self.kernel, self.num_neighbors, self.max_memory,
args.optimizer, self.lr))
# Optimizer for state embedding CNN
self.q_lr = args.q_lr
self.batch_size = args.batch_size
self.optimizer = get_optimizer(args.optimizer, self.cnn.parameters(),
self.lr)
def init_model(self):
'''
pooling, rnn, lstm, bilstm, cnn, multi_cnn, gru
:return:
'''
if self.opts.model == 'pooling':
self.model = Pooling(opts=self.opts,
vocab=self.vocab,
label_vocab=self.label_vocab)
elif self.opts.model == 'cnn':
self.model = CNN(opts=self.opts,
vocab=self.vocab,
label_vocab=self.label_vocab)
elif self.opts.model == 'multi_channel_cnn':
self.model = Multi_Channel_CNN(opts=self.opts,
vocab=self.vocab,
label_vocab=self.label_vocab)
elif self.opts.model == 'multi_layer_cnn':
self.model = Multi_Layer_CNN(opts=self.opts,
vocab=self.vocab,
label_vocab=self.label_vocab)
elif self.opts.model == 'char_cnn':
self.char = True
self.model = Char_CNN(opts=self.opts,
vocab=self.vocab,
char_vocab=self.char_vocab,
label_vocab=self.label_vocab)
elif self.opts.model == 'lstm':
self.model = LSTM(opts=self.opts,
vocab=self.vocab,
label_vocab=self.label_vocab)
elif self.opts.model == 'gru':
self.model = GRU(opts=self.opts,
vocab=self.vocab,
label_vocab=self.label_vocab)
elif self.opts.model == 'lstm_cnn':
self.model = LSTM_CNN(opts=self.opts,
vocab=self.vocab,
label_vocab=self.label_vocab)
elif self.opts.model == 'treelstm':
self.tree = True
self.model = BatchChildSumTreeLSTM(opts=self.opts,
vocab=self.vocab,
label_vocab=self.label_vocab)
elif self.opts.model == 'cnn_treelstm':
self.tree = True
self.model = CNN_TreeLSTM(opts=self.opts,
vocab=self.vocab,
label_vocab=self.label_vocab)
elif self.opts.model == 'lstm_treelstm':
self.tree = True
self.model = LSTM_TreeLSTM(opts=self.opts,
vocab=self.vocab,
label_vocab=self.label_vocab)
else:
raise RuntimeError('please choose your model first!')
if self.opts.use_cuda:
self.model = self.model.cuda()
def load_models(modelsfolder):
'''
@param modelfolder the path to the folder where models are saved
@return dict{} dictionary of the models for each label in mlfashion.labels()
'''
models = {}
for label in labels():
models[label] = CNN.load_model(modelsfolder + label + '0.ckpt', label)
return models
def setup(opt):
if opt.model == "cnn":
model = CNN(opt)
elif opt.model == "bilstm":
model = BiLSTM(opt)
elif opt.model == "transformer":
model = Transformer(opt)
elif opt.model == "gah":
model = GAH(opt)
elif opt.model == 'gahs':
model = GAHs(opt)
else:
raise Exception("model not supported: {}".format(opt.model))
return model
def setup(opt):
if opt.contatenate == 1:
opt.max_sequence_length = opt.max_sequence_length_contatenate
if opt.model == "lstm_2L":
model = LSTM2L(opt)
elif opt.model == "cnn":
model = CNN(opt)
elif opt.model == "bilstm":
model = BiLSTM(opt)
elif opt.model == "bilstm_2L":
model = BiLSTM2L(opt)
else:
raise Exception("model not supported: {}".format(opt.model))
return model
def get_model(dataloader):
if hp.model_name == "CNN":
from models.CNN import Trainer, CNN
model = CNN()
elif hp.model_name == "RNN":
from models.RNN import Trainer, RNN
model = RNN(hp.n_features, 64, 3, hp.num_classes, hp.device, classes=None)
elif hp.model_name == "AudioEncoder":
from models.AudioEncoder import Trainer, AudioEncoder
model = AudioEncoder()
elif hp.model_name == "GAN":
from models.GAN import Gan, Trainer
model = Gan()
elif hp.model_name == "Test":
from models.TestModul import TestModule, Trainer
model = TestModule()
if os.path.isfile(hp.model_path):
model.load_state_dict(torch.load(hp.model_path))
print("model loaded from: {}".format(hp.model_path))
trainer = Trainer(dataloader, model)
return model, trainer
def compute_results(subnet_type, weight_sharing, aux_loss, rounds=1):
print("=" * 100)
print('\nWeight sharing:', weight_sharing, ' Aux loss:', aux_loss,
' Subnet:', subnet_type)
if subnet_type == 'FCN':
alpha = config.BEST_ALPHA_FCN
nb_hidden_layers = config.SIAMESE_NET_BEST_NB_FCN
hidden_layer = config.SIAMESE_NET_BEST_HIDDEN_FCN
print('\nSubnet parameters:', ' HL: ', config.FCN_BEST_HIDDEN,
' KL: ', config.FCN_BEST_NB)
print('\nSiamese parameters:', ' HL: ', hidden_layer, ' KL: ',
nb_hidden_layers, ' alpha: ', alpha)
subnet1 = FCN(nb_hidden_layers=config.FCN_BEST_NB,
hidden_layer=config.FCN_BEST_HIDDEN)
subnet2 = FCN(nb_hidden_layers=config.FCN_BEST_NB,
hidden_layer=config.FCN_BEST_HIDDEN)
else:
alpha = config.BEST_ALPHA_CNN
nb_hidden_layers = config.SIAMESE_NET_BEST_NB_CNN
hidden_layer = config.SIAMESE_NET_BEST_HIDDEN_CNN
print('\nSubnet parameters:', ' BC: ', config.CNN_BEST_CHANNEL,
' KC: ', config.CNN_BEST_KERNEL_SIZE, ' HL: ',
config.CNN_BEST_HIDDEN, ' KL: ', config.CNN_BEST_NB)
print('\nSiamese parameters:', ' HL: ', hidden_layer, ' KL: ',
nb_hidden_layers, ' alpha: ', alpha)
subnet1 = CNN(nb_hidden_layers=config.CNN_BEST_NB,
hidden_layer=config.CNN_BEST_HIDDEN,
base_channel_size=config.CNN_BEST_CHANNEL,
kernel_size=config.CNN_BEST_KERNEL_SIZE)
subnet2 = CNN(nb_hidden_layers=config.CNN_BEST_NB,
hidden_layer=config.CNN_BEST_HIDDEN,
base_channel_size=config.CNN_BEST_CHANNEL,
kernel_size=config.CNN_BEST_KERNEL_SIZE)
if weight_sharing:
model = SiameseNet(subnet1,
nb_hidden_layers=nb_hidden_layers,
hidden_layer=hidden_layer)
else:
model = SiameseNet(subnet1,
subnet2,
nb_hidden_layers=nb_hidden_layers,
hidden_layer=hidden_layer)
loss_train = []
acc_train = []
loss_test = []
acc_test = []
for i in range(rounds):
print('\nTrain beginning...')
training_losses, training_acc, _, _, test_losses, test_acc, _, _ = train_siamese(
model=model,
dataloader=train_dataloader,
test_dataloader=test_dataloader,
aux_loss=aux_loss,
alpha=alpha)
print('\nTrain complete !')
final_train_loss, final_train_acc = training_losses[-1], training_acc[
-1]
loss_train.append(final_train_loss)
acc_train.append(final_train_acc)
final_test_loss, final_test_acc = test_losses[-1], test_acc[-1]
loss_test.append(final_test_loss)
acc_test.append(final_test_acc)
mean_train_loss = sum(loss_train) / len(loss_train)
mean_train_acc = sum(acc_train) / len(acc_train)
print(
"In epoch {0}, on the train set we obtain a loss of {1} and an accuracy of {2}"
.format(config.EPOCHS, round(mean_train_loss, 3),
round(mean_train_acc, 3)))
mean_test_loss = sum(loss_test) / len(loss_test)
mean_test_acc = sum(acc_test) / len(acc_test)
print(
"In epoch {0}, on the test set we obtain a loss of {1} and an accuracy of {2}"
.format(config.EPOCHS, round(mean_test_loss, 3),
round(mean_test_acc, 3)))
def createNeuralNetworkModel(self, neuralNetworkModel):
if neuralNetworkModel == "cnn":
return CNN()
elif neuralNetworkModel == "rnn":
return RNN()
def __init__(self, pretrained=False):
super(DAGCN_features, self).__init__()
self.model_cnn = CNN(pretrained)
self.model_GCN = MRF_GCN(pretrained)
self.__in_features = 256*1
def trainClassify():
args = parser_args()
device_id = args.gpu
X_train, y_train, X_test, y_test = get_data(train_data, test_data,
train_name, test_name)
model = CNN(n_class=num_cate)
if device_id >= 0:
xp = cuda.cupy
model.to_gpu(device_id)
else:
xp = np
optimizer = optimizers.MomentumSGD(lr=0.005, momentum=0.9)
# optimizer = optimizers.Adam()
optimizer.setup(model)
optimizer.add_hook(chainer.optimizer.WeightDecay(args.weight_decay))
N_train = len(X_train)
N_test = len(X_test)
n_epoch = 50
batchsize = 30
with open(log_txt, 'w'):
pass
with open(log_dat, 'w'):
pass
for epoch in range(n_epoch):
print('Epoch %d :' % (epoch + 1), end=" ")
data = open(log_dat, "a")
data.write('%d ' % (epoch + 1))
data.close()
# Training
sum_loss = 0
pred_y = []
perm = np.random.permutation(N_train)
for i in range(0, N_train, batchsize):
# x = Variable(xp.array(augument(X_train[perm[i: i+batchsize]])).astype(xp.float32))
x = Variable(
xp.array(X_train[perm[i:i + batchsize]]).astype(xp.float32))
t = Variable(
xp.array(y_train[perm[i:i + batchsize]]).astype(xp.int32))
optimizer.update(model, x, t)
if device_id >= 0:
sum_loss += cuda.to_cpu(model.loss.data) * len(x.data)
pred_y.extend((np.sign(cuda.to_cpu(model.y.data)) + 1) / 2)
else:
sum_loss += np.array(model.loss.data) * len(x.data)
pred_y.extend((np.sign(np.array(model.y.data)) + 1) / 2)
loss = sum_loss / N_train
accuracy = xp.sum(
xp.array(pred_y, dtype=xp.int32) == xp.array(
y_train[perm], dtype=xp.int32)) / N_train / num_cate
print('\nTrain loss %.3f, accuracy %.4f |' % (loss, accuracy), end=" ")
log = open(log_txt, "a")
log.write('Train loss %.3f, accuracy %.4f |' % (loss, accuracy))
log.close()
data = open(log_dat, "a")
data.write('%.3f %.4f ' % (loss, accuracy))
data.close()
for i in range(num_cate):
accu = xp.sum(
xp.array(pred_y, dtype=xp.int32)[:, i] == xp.array(
y_train[perm][:, i], dtype=xp.int32)) / N_train
print('Category %d: %.4f |' % (i, accu), end=" ")
log = open(log_txt, "a")
log.write('Category %d: %.4f |' % (i, accu))
log.close()
data = open(log_dat, "a")
data.write('%.4f ' % accu)
data.close()
# Testing
sum_loss = 0
pred_y = []
for i in range(0, N_test, batchsize):
# x = Variable(xp.array(augument(X_test[i: i+batchsize])).astype(xp.float32))
x = Variable(xp.array(X_test[i:i + batchsize]).astype(xp.float32))
t = Variable(xp.array(y_test[i:i + batchsize]).astype(xp.int32))
if device_id >= 0:
with chainer.using_config('train', False):
sum_loss += cuda.to_cpu(model(x, t).data) * len(x.data)
pred_y.extend((np.sign(cuda.to_cpu(model.y.data)) + 1) / 2)
else:
with chainer.using_config('train', False):
sum_loss += np.array(model(x, t).data) * len(x.data)
pred_y.extend((np.sign(np.array(model.y.data)) + 1) / 2)
loss = sum_loss / N_test
accuracy = xp.sum(
xp.array(pred_y, dtype=xp.int32) == xp.array(
y_test, dtype=xp.int32)) / N_test / num_cate
print('\n Test loss %.3f, accuracy %.4f |' % (loss, accuracy), end=" ")
log = open(log_txt, "a")
log.write('\n Test loss %.3f, accuracy %.4f |' % (loss, accuracy))
log.close()
data = open(log_dat, "a")
data.write('%.3f %.4f ' % (loss, accuracy))
data.close()
for i in range(num_cate):
accu = xp.sum(
xp.array(pred_y, dtype=xp.float32)[:, i] == xp.array(
y_test[:, i], dtype=xp.float32)) / N_test
print('Category %d: %.4f |' % (i, accu), end=" ")
log = open(log_txt, "a")
log.write('Category %d: %.4f |' % (i, accu))
log.close()
data = open(log_dat, "a")
data.write('%.4f ' % accu)
data.close()
print()
log = open(log_txt, "a")
log.write('\n')
log.close()
data = open(log_dat, "a")
data.write('\n')
data.close()
if (epoch + 1) % 5 == 0:
serializers.save_hdf5(
SavedModelFolder + '/FaceCl_{0:03d}.model'.format(epoch + 1),
model)
try:
os.makedirs(params.plot_dir)
except FileExistsError:
pass
logger = logging.getLogger('CNN.cv{}'.format(i))
set_logger(os.path.join(model_dir, 'train.cv{}.log'.format(i)), logger)
params.restore = False
# use GPU if available
cuda_exist = torch.cuda.is_available()
# Set random seeds for reproducible experiments if necessary
if cuda_exist:
params.device = torch.device('cuda')
# torch.cuda.manual_seed(240)
logger.info('Using Cuda...')
model = CNN(params, logger).cuda()
else:
params.device = torch.device('cpu')
# torch.manual_seed(230)
logger.info('Not using cuda...')
model = CNN(params, logger)
logger.info('Loading the datasets for batch-training')
logger.info('Loading complete.')
logger.info(f'Model: \n{str(model)}')
params.num_epochs = 100
model.xfit(train_loader, val_loader, restore_file=os.path.join(
params.model_dir, 'best.pth.tar'))
class CRNN(nn.Module):
def __init__(self,
n_in_channel,
nclass,
attention=False,
activation="Relu",
dropout=0,
train_cnn=True,
rnn_type='BGRU',
n_RNN_cell=64,
n_layers_RNN=1,
dropout_recurrent=0,
**kwargs):
super(CRNN, self).__init__()
self.attention = attention
self.cnn = CNN(n_in_channel, activation, dropout, **kwargs)
if not train_cnn:
for param in self.cnn.parameters():
param.requires_grad = False
self.train_cnn = train_cnn
if rnn_type == 'BGRU':
self.rnn = BidirectionalGRU(self.cnn.nb_filters[-1],
n_RNN_cell,
dropout=dropout_recurrent,
num_layers=n_layers_RNN)
else:
NotImplementedError("Only BGRU supported for CRNN for now")
self.dropout = nn.Dropout(dropout)
self.dense = nn.Linear(n_RNN_cell * 2, nclass)
self.sigmoid = nn.Sigmoid()
if self.attention:
self.dense_softmax = nn.Linear(n_RNN_cell * 2, nclass)
self.softmax = nn.Softmax(dim=-1)
def load_cnn(self, parameters):
self.cnn.load(parameters)
if not self.train_cnn:
for param in self.cnn.parameters():
param.requires_grad = False
def load(self, filename=None, parameters=None):
if filename is not None:
parameters = torch.load(filename)
if parameters is None:
raise NotImplementedError(
"load is a filename or a list of parameters (state_dict)")
self.cnn.load(parameters=parameters["cnn"])
self.rnn.load_state_dict(parameters["rnn"])
self.dense.load_state_dict(parameters["dense"])
def state_dict(self, destination=None, prefix='', keep_vars=False):
state_dict = {
"cnn":
self.cnn.state_dict(destination=destination,
prefix=prefix,
keep_vars=keep_vars),
"rnn":
self.rnn.state_dict(destination=destination,
prefix=prefix,
keep_vars=keep_vars),
'dense':
self.dense.state_dict(destination=destination,
prefix=prefix,
keep_vars=keep_vars)
}
return state_dict
def save(self, filename):
parameters = {
'cnn': self.cnn.state_dict(),
'rnn': self.rnn.state_dict(),
'dense': self.dense.state_dict()
}
torch.save(parameters, filename)
def forward(self, x):
# input size : (batch_size, n_channels, n_frames, n_freq)
# conv features
x = self.cnn(x)
bs, chan, frames, freq = x.size()
if freq != 1:
warnings.warn("Output shape is: {}".format(
(bs, frames, chan * freq)))
x = x.permute(0, 2, 1, 3)
x = x.contiguous().view(bs, frames, chan * freq)
else:
x = x.squeeze(-1)
x = x.permute(0, 2, 1) # [bs, frames, chan]
# rnn features
x = self.rnn(x)
x = self.dropout(x)
strong = self.dense(x) # [bs, frames, nclass]
strong = self.sigmoid(strong)
if self.attention:
sof = self.dense_softmax(x) # [bs, frames, nclass]
sof = self.softmax(sof)
sof = torch.clamp(sof, min=1e-7, max=1)
weak = (strong * sof).sum(1) / sof.sum(1) # [bs, nclass]
else:
weak = strong.mean(1)
return strong, weak
log_file = open(save_path + model_name + "_test_logs.txt", 'a+')
# prepare test loader for the test set
test_file = args.data_path + args.test_file
test_data = ArticlesDataset(csv_file=test_file, vocab=vocab, label2id=label2id, max_text_len=args.text_len)
test_loader = DataLoader(test_data, batch_size=args.batch_size, shuffle=False)
scores_dict = {'f1': [], 'recall': [], 'precision': [], 'confidence': []}
for run_num in range(args.num_runs):
model_run_name = model_name + "_run"+str(run_num+1)
print("-"*10, "Run", run_num+1, "-"*10)
print("Model name:", model_run_name)
print("Loading model from", save_path + model_run_name + ".pt")
best_model = CNN(cnn_args=cnn_args, mlp_args=mlp_args).to(device)
optimizer = torch.optim.Adam(best_model.parameters(), lr=0.005)
load_checkpoint(save_path + model_run_name + ".pt", best_model, optimizer, device, log_file)
results = evaluate(best_model, test_loader)
scores_dict['f1'].append(results['f1'])
scores_dict['recall'].append(results['recall'])
scores_dict['precision'].append(results['precision'])
# if args.save_confidence is True:
# scores_dict['confidence'].append(results['confidence'])
# scores_dict['labels'].append(results['labels'])
# scores_dict['content'].append(results['content'])
# sentence_encodings = results['sentence_encodings']
def run_episode(strategies, policy, beta, device, num_worker):
states, actions = [], []
# all strategies use same initial training data and model weights
reinit_seed(prop.RANDOM_SEED)
if prop.MODEL == "MLP":
model = MLP().apply(weights_init).to(device)
if prop.MODEL == "CNN":
model = CNN().apply(weights_init).to(device)
if prop.MODEL == "RESNET18":
model = models.resnet.ResNet18().to(device)
init_weights = deepcopy(model.state_dict())
# re-init seed was here before
use_learner = True if np.random.rand(1) > beta else False
if use_learner:
policy = policy.to(
device) # load policy only when learner is used for states
dataset_pool, valid_dataset, test_dataset = get_policy_training_splits()
train_dataset, pool_dataset = stratified_split_dataset(
dataset_pool, prop.INIT_SIZE, prop.NUM_CLASSES)
# Initial sampling
if prop.SINGLE_HEAD:
my_strategies = []
for StrategyClass in strategies:
my_strategies.append(
StrategyClass(dataset_pool, valid_dataset, test_dataset))
if prop.CLUSTER_EXPERT_HEAD:
UncertaintyStrategieClasses, DiversityStrategieClasses = strategies
un_strategies = []
di_strategies = []
for StrategyClass in UncertaintyStrategieClasses:
un_strategies.append(
StrategyClass(dataset_pool, valid_dataset, test_dataset))
for StrategyClass in DiversityStrategieClasses:
di_strategies.append(
StrategyClass(dataset_pool, valid_dataset, test_dataset))
if prop.CLUSTERING_AUX_LOSS_HEAD:
my_strategies = []
for StrategyClass in strategies:
my_strategies.append(
StrategyClass(dataset_pool, valid_dataset, test_dataset))
init_acc = train_validate_model(model, device, train_dataset,
valid_dataset, test_dataset)
t = trange(1,
prop.NUM_ACQS + 1,
desc="Aquisitions (size {})".format(prop.ACQ_SIZE),
leave=True)
for acq_num in t:
subset_ind = np.random.choice(a=len(pool_dataset),
size=prop.K,
replace=False)
pool_subset = make_tensordataset(pool_dataset, subset_ind)
if prop.CLUSTER_EXPERT_HEAD:
un_sel_ind = expert(acq_num, model, init_weights, un_strategies,
train_dataset, pool_subset, valid_dataset,
test_dataset, device)
di_sel_ind = expert(acq_num, model, init_weights, un_strategies,
train_dataset, pool_subset, valid_dataset,
test_dataset, device)
state, action = get_state_action(model,
train_dataset,
pool_subset,
un_sel_ind=un_sel_ind,
di_sel_ind=di_sel_ind)
if prop.SINGLE_HEAD:
sel_ind = expert(acq_num, model, init_weights, my_strategies,
train_dataset, pool_subset, valid_dataset,
test_dataset, device)
state, action = get_state_action(model,
train_dataset,
pool_subset,
sel_ind=sel_ind)
if prop.CLUSTERING_AUX_LOSS_HEAD:
sel_ind = expert(acq_num, model, init_weights, my_strategies,
train_dataset, pool_subset, valid_dataset,
test_dataset, device)
state, action = get_state_action(model,
train_dataset,
pool_subset,
sel_ind=sel_ind,
clustering=None)
# not implemented
states.append(state)
actions.append(action)
if use_learner:
with torch.no_grad():
if prop.SINGLE_HEAD:
policy_outputs = policy(state.to(device)).flatten()
sel_ind = torch.topk(policy_outputs,
prop.ACQ_SIZE)[1].cpu().numpy()
if prop.CLUSTER_EXPERT_HEAD:
policy_output_uncertainty, policy_output_diversity = policy(
state.to(device))
# clustering_space = policy_output_diversity.reshape(prop.K, prop.POLICY_OUTPUT_SIZE)
# one topk for uncertainty, one topk for diversity
diversity_selection = torch.topk(
policy_output_diversity.reshape(prop.K),
int(prop.ACQ_SIZE / 2.0))[1].cpu().numpy()
uncertainty_selection = torch.topk(
policy_output_uncertainty.reshape(prop.K),
int(prop.ACQ_SIZE / 2.0))[1].cpu().numpy()
sel_ind = (uncertainty_selection, diversity_selection)
if prop.CLUSTERING_AUX_LOSS_HEAD:
# not implemented
policy_outputs = policy(state.to(device)).flatten()
sel_ind = torch.topk(policy_outputs,
prop.ACQ_SIZE)[1].cpu().numpy()
if prop.SINGLE_HEAD:
q_idxs = subset_ind[sel_ind] # from subset to full pool
if prop.CLUSTER_EXPERT_HEAD:
unified_sel_ind = np.concatenate((sel_ind[0], sel_ind[1]))
q_idxs = subset_ind[unified_sel_ind] # from subset to full pool
remaining_ind = list(set(np.arange(len(pool_dataset))) - set(q_idxs))
sel_dataset = make_tensordataset(pool_dataset, q_idxs)
train_dataset = concat_datasets(train_dataset, sel_dataset)
pool_dataset = make_tensordataset(pool_dataset, remaining_ind)
test_acc = train_validate_model(model, device, train_dataset,
valid_dataset, test_dataset)
return states, actions
# np.random.seed(seed_num)
# torch.manual_seed(seed_num)
# print("seed:", seed_num)
emb_name = args.pretrained_emb.split("/")[-1][:-4]
model_name = "cnn_" + str(args.emb_dim) + "embDim_" + \
str(args.num_kernel) + "kernels_" + \
str(args.stride) + "stride_" + \
str(args.mlp_hidden_size) + "MLPhidden_" + \
str(args.num_epochs) + "epochs" + "_" + emb_name
model_name += "_run" + str(run_num + 1)
print("Model name:", model_name)
log_file = open(save_path + model_name + "_logs.txt", 'w')
model = CNN(cnn_args=cnn_args, mlp_args=mlp_args).to(device)
print(model)
optimizer = optim.Adam(model.parameters(), lr=0.001)
loss_fn = nn.BCELoss()
train(model=model,
optimizer=optimizer,
num_epochs=num_epochs,
criterion=loss_fn,
eval_every=args.step_size,
train_loader=train_loader,
valid_loader=valid_loader,
save_path=save_path,
model_name=model_name)
print(len(input_array)) print(target_array) h.randomShuffleTogether(input_array, target_array) train_data, train_labels, test_data, test_labels = h.splitToTrainAndTest(input_array, target_array, 0.66) #method = "train" method = "read" cnn = CNN() cnn.data(train_data, train_labels, test_data, test_labels) cnn.createModel() cnn.findBestWeights(method) cnn.testModel() print() #method = "train" method = "read" lstm = LSTM() lstm.data(train_data, train_labels, test_data, test_labels) lstm.createModel() lstm.findBestWeights(method)
def main():
args = parse_args()
train_iter = DataIterator(args.train_file, args.max_seq_len,
args.batch_size)
dev_iter = DataIterator(args.dev_file, args.max_seq_len, args.batch_size)
test_iter = DataIterator(args.test_file, args.max_seq_len, args.batch_size)
train_data = DataLoader(args.train_file)
vocab_size = len(train_data.vocab)
weights = train_data.get_pretrained_weights(args.pretrained_embeddings)
args.pretrained_weights = weights
# udpate the args
args.vocab_size = vocab_size
# a small step to solve the problem of command line input interpreted as string
args.kernel_sizes = [int(x) for x in args.kernel_sizes]
logger = getLogger(args.run_log)
print("\nParameters:")
for attr, value in sorted(args.__dict__.items()):
logger.info("\t{}={}".format(attr.upper(), value))
if args.model == "CNN":
model = CNN(args)
elif args.model == "BiLSTM":
model = BiLSTM(args)
elif args.model == "CNN_BiLSTM":
model = CNN_BiLSTM(args)
elif args.model == "CNN_BiLSTM_ATT":
model = CNN_BiLSTM_ATTENTION(args)
print(model)
# starting training, comment this line if you are load a pretrained model
if args.test is False:
##
for epoch in range(args.num_epochs):
best_acc = 0.0
#model.train()
steps = train(epoch, train_iter, model, args, logger)
for mode in ['development', 'testing']:
if mode == 'development':
evaluate(dev_iter, model, args, logger, mode)
elif mode == 'testing':
test_acc, predictions = evaluate(test_iter, model, args,
logger, mode)
if test_acc > best_acc:
best_acc = test_acc
save(model, args.saved_model, 'best', steps)
save_predictions(args.test_file, args.prediction_file,
predictions)
else:
model = torch.load(args.saved_model,
map_location=lambda storage, loc: storage)
#model.eval()
evaluate(test_iter, model, args, logger, mode='testing')
from models.CNN import CNN
class Main:
def __init__(self):
Xtrain = self.Xtrain
Xtest = self.Xtest
Ytrain = self.Ytrain
Ytrain = self.Ytest
cnn = CNN()
cnn.addConvolutionalLayer()
cnn.maxPooling()
cnn.flattening()
cnn.fullConnection()
cnn.compile()
cnn.trainTest()
def run(args, kwargs):
args.model_signature = str(datetime.datetime.now())[0:19]
model_name = '' + args.model_name
if args.loc_gauss or args.loc_inv_q or args.loc_att:
args.loc_info = True
if args.att_gauss_abnormal or args.att_inv_q_abnormal or args.att_gauss_spatial or args.att_inv_q_spatial or \
args.att_module or args.laplace_att:
args.self_att = True
print(args)
with open('experiment_log_' + args.operator + '.txt', 'a') as f:
print(args, file=f)
# IMPORT MODEL======================================================================================================
from models.CNN import CNN as Model
# START KFOLDS======================================================================================================
print('\nSTART KFOLDS CROSS VALIDATION\n')
# print(f'{args.kfold_test} Test-Train folds each has {args.epochs} epochs for a {1.0/args.kfold_val}/{(args.kfold_val - 1.0)/args.kfold_val} Valid-Train split\n')
train_folds, test_folds = kfold_indices_warwick(args.dataset_size, args.kfold_test, seed=args.seed)
train_error_folds = []
test_error_folds = []
for current_fold in range(1, args.kfold_test + 1):
print('#################### Train-Test fold: {}/{} ####################'.format(current_fold, args.kfold_test))
# DIRECTORY FOR SAVING==========================================================================================
snapshots_path = 'snapshots/'
dir = snapshots_path + model_name + '_' + args.model_signature + '/'
sw = SummaryWriter(f'tensorboard/{model_name}_{args.model_signature}_fold_{current_fold}')
if not os.path.exists(dir):
os.makedirs(dir)
# LOAD DATA=====================================================================================================
train_fold, val_fold = kfold_indices_warwick(len(train_folds[current_fold - 1]), args.kfold_val, seed=args.seed)
train_fold = [train_folds[current_fold - 1][i] for i in train_fold]
val_fold = [train_folds[current_fold - 1][i] for i in val_fold]
loc = True if args.loc_info or args.out_loc else False
train_set, val_set, test_set = load_breast(train_fold[0], val_fold[0], test_folds[current_fold - 1], loc)
# CREATE MODEL==================================================================================================
print('\tcreate models')
model = Model(args)
if args.cuda:
model.cuda()
# INIT OPTIMIZER================================================================================================
print('\tinit optimizer')
if args.optimizer == 'Adam':
optimizer = optim.Adam(model.parameters(), lr=args.lr, betas=(0.9, 0.999), weight_decay=args.reg)
elif args.optimizer == 'SGD':
optimizer = optim.SGD(model.parameters(), lr=args.lr, weight_decay=args.reg, momentum=0.9)
else:
raise Exception('Wrong name of the optimizer!')
scheduler = optim.lr_scheduler.StepLR(optimizer, step_size=60, gamma=0.1)
# PERFORM EXPERIMENT============================================================================================
print('\tperform experiment\n')
train_error, test_error = experiment(
args,
kwargs,
current_fold,
train_set,
val_set,
test_set,
model,
optimizer,
scheduler,
dir,
sw,
)
# APPEND FOLD RESULTS===========================================================================================
train_error_folds.append(train_error)
test_error_folds.append(test_error)
with open('final_results_' + args.operator + '.txt', 'a') as f:
print('RESULT FOR A SINGLE FOLD\n'
'SEED: {}\n'
'OPERATOR: {}\n'
'FOLD: {}\n'
'ERROR (TRAIN): {}\n'
'ERROR (TEST): {}\n\n'.format(args.seed, args.operator, current_fold, train_error, test_error),
file=f)
# ======================================================================================================================
print('-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-')
with open('experiment_log_' + args.operator + '.txt', 'a') as f:
print('-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-\n', file=f)
return np.mean(train_error_folds), np.std(train_error_folds), np.mean(test_error_folds), np.std(test_error_folds)
import torch.nn as nn
from torchvision import transforms
from torchvision.datasets import ImageFolder
from models.CNN import CNN
from trainer.trainer import Trainer
from data_loader.few_shot_dataloaders import get_few_shot_dataloader
transform = transforms.Compose([
transforms.Resize(256),
transforms.CenterCrop(224),
transforms.ToTensor()
])
train_set = ImageFolder('/datasets/imagenetwhole/ilsvrc2012/train/',
transform=transform)
val_set = ImageFolder('/datasets/imagenetwhole/ilsvrc2012/val/',
transform=transform)
model = CNN()
loss = nn.CrossEntropyLoss()
train_loader = get_few_shot_dataloader(train_set)
val_loader = get_few_shot_dataloader(val_set)
trainer = Trainer(model, loss, train_loader, val_loader)
trainer.train(epochs=100)
class WCRNN(nn.Module): #, BaseFairseqModel):
def __init__(self,
w2v_cfg,
n_in_channel,
nclass,
attention=False,
activation="Relu",
dropout=0,
train_cnn=True,
rnn_type='BGRU',
n_RNN_cell=64,
n_layers_RNN=1,
dropout_recurrent=0,
cnn_integration=False,
**kwargs):
super(WCRNN, self).__init__()
self.w2v = w2v_encoder(w2v_cfg) #Wav2Vec2Config)
#self.w2v = Wav2VecEncoder(Wav2Vec2SedConfig, None)
self.pooling = nn.Sequential(nn.MaxPool2d((1, 4), (1, 4)))
self.n_in_channel = n_in_channel
self.attention = attention
self.cnn_integration = cnn_integration
n_in_cnn = n_in_channel
if cnn_integration:
n_in_cnn = 1
self.cnn = CNN(n_in_cnn, activation, dropout, **kwargs)
if not train_cnn:
for param in self.cnn.parameters():
param.requires_grad = False
self.train_cnn = train_cnn
if rnn_type == 'BGRU':
nb_in = self.cnn.nb_filters[-1]
if self.cnn_integration:
# self.fc = nn.Linear(nb_in * n_in_channel, nb_in)
nb_in = nb_in * n_in_channel
self.rnn = BidirectionalGRU(nb_in,
n_RNN_cell,
dropout=dropout_recurrent,
num_layers=n_layers_RNN)
else:
NotImplementedError("Only BGRU supported for CRNN for now")
self.dropout = nn.Dropout(dropout)
self.dense = nn.Linear(n_RNN_cell * 2, nclass)
self.sigmoid = nn.Sigmoid()
if self.attention:
self.dense_softmax = nn.Linear(n_RNN_cell * 2, nclass)
self.softmax = nn.Softmax(dim=-1)
def load_cnn(self, state_dict):
self.cnn.load_state_dict(state_dict)
if not self.train_cnn:
for param in self.cnn.parameters():
param.requires_grad = False
def load_state_dict(self, state_dict, strict=True):
self.w2v.load_state_dice(state_dict["w2v"])
self.cnn.load_state_dict(state_dict["cnn"])
self.rnn.load_state_dict(state_dict["rnn"])
self.dense.load_state_dict(state_dict["dense"])
def state_dict(self, destination=None, prefix='', keep_vars=False):
state_dict = {
"w2v":
self.w2v.state_dict(destination=destination,
prefix=prefix,
keep_vars=keep_vars),
"cnn":
self.cnn.state_dict(destination=destination,
prefix=prefix,
keep_vars=keep_vars),
"rnn":
self.rnn.state_dict(destination=destination,
prefix=prefix,
keep_vars=keep_vars),
'dense':
self.dense.state_dict(destination=destination,
prefix=prefix,
keep_vars=keep_vars)
}
return state_dict
def save(self, filename):
parameters = {
'w2v': self.w2v.state_dict(),
'cnn': self.cnn.state_dict(),
'rnn': self.rnn.state_dict(),
'dense': self.dense.state_dict()
}
torch.save(parameters, filename)
def forward(self, audio):
x = audio.squeeze()
import pdb
pdb.set_trace()
feature = self.w2v(x)
x = feature['x']
x = x.transpose(1, 0)
x = x.unsqueeze(1)
# input size : (batch_size, n_channels, n_frames, n_freq)
if self.cnn_integration:
bs_in, nc_in = x.size(0), x.size(1)
x = x.view(bs_in * nc_in, 1, *x.shape[2:])
# conv features
before = x
x = self.cnn(x)
bs, chan, frames, freq = x.size()
if self.cnn_integration:
x = x.reshape(bs_in, chan * nc_in, frames, freq)
if freq != 1:
warnings.warn(
f"Output shape is: {(bs, frames, chan * freq)}, from {freq} staying freq"
)
x = x.permute(0, 2, 1, 3)
x = x.contiguous().view(bs, frames, chan * freq)
else:
x = x.squeeze(-1)
x = x.permute(0, 2, 1) # [bs, frames, chan]
# rnn features
x = self.rnn(x)
x = self.dropout(x)
strong = self.dense(x) # [bs, frames, nclass]
strong = self.sigmoid(strong)
if self.attention:
sof = self.dense_softmax(x) # [bs, frames, nclass]
sof = self.softmax(sof)
sof = torch.clamp(sof, min=1e-7, max=1)
weak = (strong * sof).sum(1) / (sof.sum(1) + 1e-08) # [bs, nclass]
else:
weak = strong.mean(1)
return strong, weak
def active_learn(exp_num, StrategyClass, subsample):
# all strategies use same initial training data and model weights
reinit_seed(prop.RANDOM_SEED)
test_acc_list = []
if prop.MODEL.lower() == "mlp":
model = MLP().apply(weights_init).to(device)
if prop.MODEL.lower() == "cnn":
model = CNN().apply(weights_init).to(device)
if prop.MODEL.lower() == "resnet18":
model = models.resnet.ResNet18().to(device)
init_weights = copy.deepcopy(model.state_dict())
reinit_seed(exp_num * 10)
dataset_pool, valid_dataset, test_dataset = get_data_splits()
train_dataset, pool_dataset = stratified_split_dataset(
dataset_pool, 2 * prop.NUM_CLASSES, prop.NUM_CLASSES) #
# initial data
strategy = StrategyClass(dataset_pool, valid_dataset, test_dataset, device)
# calculate the overlap of strategy with other strategies
strategies = [
MCDropoutSampling, EnsembleSampling, EntropySampling,
LeastConfidenceSampling, CoreSetAltSampling, BadgeSampling
]
overlapping_strategies = []
for StrategyClass in strategies:
overlapping_strategies.append(
StrategyClass(dataset_pool, valid_dataset, test_dataset))
t = trange(1,
prop.NUM_ACQS + 1,
desc="Aquisitions (size {})".format(prop.ACQ_SIZE),
leave=True)
for acq_num in t:
model.load_state_dict(init_weights)
test_acc = train_validate_model(model, device, train_dataset,
valid_dataset, test_dataset)
test_acc_list.append(test_acc)
if subsample:
subset_ind = np.random.choice(a=len(pool_dataset),
size=prop.K,
replace=False)
pool_subset = make_tensordataset(pool_dataset, subset_ind)
sel_ind, remain_ind = strategy.query(prop.ACQ_SIZE, model,
train_dataset, pool_subset)
q_idxs = subset_ind[sel_ind] # from subset to full pool
remaining_ind = list(
set(np.arange(len(pool_dataset))) - set(q_idxs))
sel_dataset = make_tensordataset(pool_dataset, q_idxs)
train_dataset = concat_datasets(train_dataset, sel_dataset)
pool_dataset = make_tensordataset(pool_dataset, remaining_ind)
else:
# all strategies work on k-sized windows in semi-batch setting
sel_ind, remaining_ind = strategy.query(prop.ACQ_SIZE, model,
train_dataset,
pool_dataset)
sel_dataset = make_tensordataset(pool_dataset, sel_ind)
pool_dataset = make_tensordataset(pool_dataset, remaining_ind)
train_dataset = concat_datasets(train_dataset, sel_dataset)
logging.info(
"Accuracy for {} sampling and {} acquisition is {}".format(
strategy.name, acq_num, test_acc))
return test_acc_list
from data import data
path.append('..')
for loc in ["SIO"]:
print(loc)
for d_type in ["std_anomalies"]:
print(d_type)
file = "../data/" + d_type + "_" + loc + ".nc"
d = data(file)
d_train, d_test, d_val = d.get_data()
if loc == "EPO":
input_dim = (40, 60)
else:
input_dim = (20, 120)
n_features = 3
from models.CNN import CNN
for j in range(50):
l = CNN(input_dim,
n_features,
batch_norm=True,
num_layers=5,
Dropout=0.1,
num_dense_layers=0,
location=loc)
losses = l.train(d_train, d_test, num_epochs=80, lr=1e-3)
losses = l.train(d_train, d_test, num_epochs=80, lr=1e-4)
l.save_weights('../models/saved_models/' + loc + '/' + d_type +
'/CNN_ens/ens_' + str(j) + '/cnn')
tf.keras.backend.clear_session()
class NEC:
def __init__(self, env, args, device='cpu'):
"""
Instantiate an NEC Agent
----------
env: gym.Env
gym environment to train on
args: args class from argparser
args are from from train.py: see train.py for help with each arg
device: string
'cpu' or 'cuda:0' depending on use_cuda flag from train.py
"""
self.environment_type = args.environment_type
self.env = env
self.device = device
# Hyperparameters
self.epsilon = args.initial_epsilon
self.final_epsilon = args.final_epsilon
self.epsilon_decay = args.epsilon_decay
self.gamma = args.gamma
self.N = args.N
# Transition queue and replay memory
self.transition_queue = []
self.replay_every = args.replay_every
self.replay_buffer_size = args.replay_buffer_size
self.replay_memory = ReplayMemory(self.replay_buffer_size)
# CNN for state embedding network
self.frames_to_stack = args.frames_to_stack
self.embedding_size = args.embedding_size
self.in_height = args.in_height
self.in_width = args.in_width
self.cnn = CNN(self.frames_to_stack, self.embedding_size,
self.in_height, self.in_width).to(self.device)
# Differentiable Neural Dictionary (DND): one for each action
self.kernel = inverse_distance
self.num_neighbors = args.num_neighbors
self.max_memory = args.max_memory
self.lr = args.lr
self.dnd_list = []
for i in range(env.action_space.n):
self.dnd_list.append(
DND(self.kernel, self.num_neighbors, self.max_memory,
args.optimizer, self.lr))
# Optimizer for state embedding CNN
self.q_lr = args.q_lr
self.batch_size = args.batch_size
self.optimizer = get_optimizer(args.optimizer, self.cnn.parameters(),
self.lr)
def choose_action(self, state_embedding):
"""
Choose epsilon-greedy policy according to Q-estimates from DNDs
"""
if random.uniform(0, 1) < self.epsilon:
return random.randint(0, self.env.action_space.n - 1)
else:
qs = [dnd.lookup(state_embedding) for dnd in self.dnd_list]
action = torch.argmax(torch.cat(qs))
return action
def Q_lookahead(self, t, warmup=False):
"""
Return the N-step Q-value lookahead from time t in the transition queue
"""
if warmup or len(self.transition_queue) <= t + self.N:
lookahead = [tr.reward for tr in self.transition_queue[t:]]
discounted = discount(lookahead, self.gamma)
Q_N = torch.tensor([discounted], requires_grad=True)
return Q_N
else:
lookahead = [
tr.reward for tr in self.transition_queue[t:t + self.N]
]
discounted = discount(lookahead, self.gamma)
state = self.transition_queue[t + self.N].state
state = torch.tensor(state).permute(2, 0,
1).unsqueeze(0) # (N,C,H,W)
state = state.to(self.device)
state_embedding = self.cnn(state)
Q_a = [dnd.lookup(state_embedding) for dnd in self.dnd_list]
maxQ = torch.cat(Q_a).max()
Q_N = discounted + (self.gamma**self.N) * maxQ
Q_N = torch.tensor([Q_N], requires_grad=True)
return Q_N
def Q_update(self, Q, Q_N):
"""
Return the Q-update for DND updates
"""
return Q + self.q_lr * (Q_N - Q)
def update(self):
"""
Iterate through the transition queue and make NEC updates
"""
# Insert transitions into DNDs
for t in range(len(self.transition_queue)):
tr = self.transition_queue[t]
action = tr.action
tr = self.transition_queue[t]
state = torch.tensor(tr.state).permute(2, 0, 1) # (C,H,W)
state = state.unsqueeze(0).to(self.device) # (N,C,H,W)
state_embedding = self.cnn(state)
dnd = self.dnd_list[action]
Q_N = self.Q_lookahead(t).to(self.device)
embedding_index = dnd.get_index(state_embedding)
if embedding_index is None:
dnd.insert(state_embedding.detach(), Q_N.detach().unsqueeze(0))
else:
Q = self.Q_update(dnd.values[embedding_index], Q_N)
dnd.update(Q.detach(), embedding_index)
Q_N = Q_N.detach().to(self.device)
self.replay_memory.push(tr.state, action, Q_N)
# Commit inserts
for dnd in self.dnd_list:
dnd.commit_insert()
# Train CNN on minibatch
for t in range(len(self.transition_queue)):
if t % self.replay_every == 0 or t == len(
self.transition_queue) - 1:
# Train on random mini-batch from self.replay_memory
batch = self.replay_memory.sample(self.batch_size)
actual_Qs = torch.cat([sample.Q_N for sample in batch])
predicted_Qs = []
for sample in batch:
state = torch.tensor(sample.state).permute(2, 0,
1) # (C,H,W)
state = state.unsqueeze(0).to(self.device) # (N,C,H,W)
state_embedding = self.cnn(state)
dnd = self.dnd_list[sample.action]
predicted_Q = dnd.lookup(state_embedding, update_flag=True)
predicted_Qs.append(predicted_Q)
predicted_Qs = torch.cat(predicted_Qs).to(self.device)
loss = torch.dist(actual_Qs, predicted_Qs)
self.optimizer.zero_grad()
loss.backward()
self.optimizer.step()
for dnd in self.dnd_list:
dnd.update_params()
# Clear out transition queue
self.transition_queue = []
def run_episode(self):
"""
Train an NEC agent for a single episode:
Interact with environment
Append (state, action, reward) transitions to transition queue
Call update at the end of the episode
"""
if self.epsilon > self.final_epsilon:
self.epsilon = self.epsilon * self.epsilon_decay
state = self.env.reset()
if self.environment_type == 'fourrooms':
fewest_steps = self.env.shortest_path_length(self.env.state)
total_steps = 0
total_reward = 0
total_frames = 0
done = False
while not done:
state_embedding = torch.tensor(state).permute(2, 0, 1) # (C,H,W)
state_embedding = state_embedding.unsqueeze(0).to(self.device)
state_embedding = self.cnn(state_embedding)
action = self.choose_action(state_embedding)
next_state, reward, done, _ = self.env.step(action)
self.transition_queue.append(Transition(state, action, reward))
total_reward += reward
total_frames += self.env.skip
total_steps += 1
state = next_state
self.update()
if self.environment_type == 'fourrooms':
n_extra_steps = total_steps - fewest_steps
return n_extra_steps, total_frames, total_reward
else:
return total_frames, total_reward
def warmup(self):
"""
Warmup the DND with values from an episode with a random policy
"""
state = self.env.reset()
total_reward = 0
total_frames = 0
done = False
while not done:
action = random.randint(0, self.env.action_space.n - 1)
next_state, reward, done, _ = self.env.step(action)
total_reward += reward
total_frames += self.env.skip
self.transition_queue.append(Transition(state, action, reward))
state = next_state
for t in range(len(self.transition_queue)):
tr = self.transition_queue[t]
state_embedding = torch.tensor(tr.state).permute(2, 0,
1) # (C,H,W)
state_embedding = state_embedding.unsqueeze(0).to(self.device)
state_embedding = self.cnn(state_embedding)
action = tr.action
dnd = self.dnd_list[action]
Q_N = self.Q_lookahead(t, True).to(self.device)
if dnd.keys_to_be_inserted is None and dnd.keys is None:
dnd.insert(state_embedding, Q_N.detach().unsqueeze(0))
else:
embedding_index = dnd.get_index(state_embedding)
if embedding_index is None:
state_embedding = state_embedding.detach()
dnd.insert(state_embedding, Q_N.detach().unsqueeze(0))
else:
Q = self.Q_update(dnd.values[embedding_index], Q_N)
dnd.update(Q.detach(), embedding_index)
self.replay_memory.push(tr.state, action, Q_N.detach())
for dnd in self.dnd_list:
dnd.commit_insert()
# Clear out transition queue
self.transition_queue = []
return total_frames, total_reward
