def setup_data(self):
transform = unrel.TRANSFORM
# Initialize trainset
self.trainset = data.Dataset(split='train',
pairs='annotated',
transform=transform)
if self.opts.train_size:
print('Using subset of %d from train_set' % self.opts.train_size)
batch_sampler = sampler.SequentialSampler(
range(self.opts.train_size))
else:
batch_sampler = None
self.trainloader = data.FauxDataLoader(self.trainset,
sampler=batch_sampler,
batch_size=self.opts.batch_size)
# Initialize testset
if self.opts.do_validation:
self.testset = data.Dataset(split='test',
pairs='annotated',
transform=transform)
batch_sampler = sampler.BatchSampler(
sampler.SequentialSampler(self.testset),
self.opts.test_batch_size, False
) # make test set load without shuffling so that we can use Tyler's RecallEvaluator
self.testloaders = [
data.FauxDataLoader(self.testset, sampler=batch_sampler)
]
else:
print('No testset')
self.testloaders = []
def get_dataloaders(train_batchsize, val_batchsize):
kwargs={
'num_workers': 20,
'pin_memory': True
}
input_size = INFO['model-info']['input-size']
base = '{}/{}'.format(os.environ['datadir-base'], INFO['dataset'])
normalize = T.Normalize(mean=INFO['dataset-info']['normalization']['mean'], std=INFO['dataset-info']['normalization']['std'])
transform = {
'train': T.Compose([
T.Resize(tuple([int(x*(4/3)) for x in input_size])), # 放大
T.RandomResizedCrop(input_size), # 随机裁剪后resize
T.RandomHorizontalFlip(0.5), # 随机水平翻转
T.RandomVerticalFlip(0.5), # 随机垂直翻转
T.RandomApply([T.RandomRotation(90)], 0.5), # 随机旋转90/270度
T.RandomApply([T.RandomRotation(180)], 0.25), # 随机旋转180度
T.RandomApply([T.ColorJitter(brightness=np.random.random()/5+0.9)], 0.5), #随机调整图像亮度
T.RandomApply([T.ColorJitter(contrast=np.random.random()/5+0.9)], 0.5), # 随机调整图像对比度
T.RandomApply([T.ColorJitter(saturation=np.random.random()/5+0.9)], 0.5), # 随机调整图像饱和度
T.ToTensor(),
normalize
]),
'val': T.Compose([
T.Resize(input_size), # 放大
T.ToTensor(),
normalize
])
}
train_dset = dset.ImageFolder('{}/{}'.format(base, 'Train'), transform=transform['train'])
train4val_dset = dset.ImageFolder('{}/{}'.format(base, 'Train'), transform=transform['val'])
val_dset = dset.ImageFolder('{}/{}'.format(base, 'Val'), transform=transform['val'])
labels = torch.from_numpy(np.array(train_dset.imgs)[:, 1].astype(int))
num_of_images_by_class = torch.zeros(len(train_dset.classes))
for i in range(len(train_dset.classes)):
num_of_images_by_class[i] = torch.where(labels == i, torch.ones_like(labels), torch.zeros_like(labels)).sum().item()
mapping = {}
for c in train_dset.classes:
if c in val_dset.classes:
mapping[train_dset.class_to_idx[c]] = val_dset.class_to_idx[c]
else:
mapping[train_dset.class_to_idx[c]] = val_dset.class_to_idx['UNKNOWN']
mapping[-1] = val_dset.class_to_idx['UNKNOWN']
train_len = train_dset.__len__()
val_len = val_dset.__len__()
train_loader = DataLoader(train_dset, batch_size=train_batchsize, sampler=sampler.RandomSampler(range(train_len)), **kwargs)
train4val_loader = DataLoader(train4val_dset, batch_size=val_batchsize, sampler=sampler.SequentialSampler(range(train_len)), **kwargs)
val_loader = DataLoader(val_dset, batch_size=val_batchsize, sampler=sampler.SequentialSampler(range(val_len)), **kwargs)
imgs = np.array(val_dset.imgs)
return train_loader, train4val_loader, val_loader, num_of_images_by_class, mapping, imgs
def get_dataloaders(train_batchsize, val_batchsize):
kwargs = {'num_workers': 20, 'pin_memory': True}
input_size = INFO['model-info']['input-size']
base = '{}/{}'.format(os.environ['datadir-base'], INFO['dataset'])
normalize = T.Normalize(mean=INFO['dataset-info']['normalization']['mean'],
std=INFO['dataset-info']['normalization']['std'])
transform = {
'val':
T.Compose([
T.Resize(608),
T.RandomResizedCrop(456),
# T.RandomCrop(456),
T.ToTensor(),
normalize
])
}
val_dset = dset.ImageFolder('{}/{}'.format(base, 'Val'),
transform=transform['val'])
val_len = val_dset.__len__()
val_loader = DataLoader(val_dset,
batch_size=val_batchsize,
sampler=sampler.SequentialSampler(range(val_len)),
**kwargs)
return None, None, val_loader, None, None, None
def __init__(self, opt):
super().__init__(daemon=True)
dataset_classes = get_dataset_classes(opt)
if len(dataset_classes) > 1:
datasets = []
for class_name, collate_fn, task_name in dataset_classes:
opt['pytorch_teacher_task'] = task_name
opt['task'] = task_name
datasets.append(class_name(opt))
self.collate = collate_fn
self.dataset = ParlAIConcatDataset(datasets)
else:
class_name, self.collate, task_name = dataset_classes[0]
self.dataset = class_name(opt)
self.bsz = opt.get('batchsize', 1)
self.num_workers = opt.get('num_workers', 4)
self.dataloader = DataLoader(
self.dataset,
batch_size=self.bsz,
shuffle=False,
sampler=sampler.SequentialSampler(self.dataset),
num_workers=self.num_workers,
collate_fn=self.collate,
pin_memory=False,
drop_last=False,
)
self.datatype = opt.get('datatype')
self.data = enumerate(self.dataloader)
self.batch_sort = opt.get('pytorch_teacher_batch_sort')
self.batch_cache_type = opt.get('batch_sort_cache_type')
self.batch_length_range = opt.get('batch_length_range')
self.batch_sort_field = opt.get('batch_sort_field')
def evaluate_model(model,
dataset,
classes,
examples=None,
batch_size=16,
dtype=torch.float32,
device=DEFAULT_DEVICE):
examples = min(examples, len(dataset)) or len(dataset)
model.eval()
loader = DataLoader(dataset,
batch_size=batch_size,
sampler=sampler.SequentialSampler(
range(examples or len(dataset))))
stats = zero_statistics(len(classes))
for x, y in loader:
x = x.to(device=device, dtype=dtype)
y = y.to(device=device, dtype=torch.long)
scores = model(x).cpu().numpy()
predictions = scores.argmax(axis=1)
stats = combine(
stats,
compute_prediction_statistics(predictions,
y.cpu().numpy(), classes))
return evaluate(stats)
def get_subm_link(criterion):
test_dataset = XRayDataset(f'{data_folder}test.csv',
f'{data_folder}',
transform=tfms,
is_train=False)
test_samplers = {'test': sampler.SequentialSampler(test_dataset)}
test_dataloaders = {
'test':
DataLoader(test_dataset,
batch_size=32,
sampler=test_samplers['test'],
num_workers=8,
pin_memory=True)
}
test_dt_szs = get_dt_szs(test_samplers)
# use_gpu = False
criterion = criterion
t_pdted, t_lbs = predict(dropout_model, 'test', test_dataloaders,
test_dt_szs)
print(np.bincount(t_pdted))
test_df = pd.read_csv(f'{data_folder}test.csv')
test_df.head()
test_df['detected'] = pd.Series([
transformed_dataset.idx_to_classes[i] for i in t_pdted
]).astype('category')
test_df.drop(['age', 'gender', 'view_position', 'image_name'],
axis=1).to_csv('sdir/fst.csv', index=False)
return FileLink('./sdir/fst.csv')
def __init__(self, opt, shared=None):
opt['batch_sort'] = False
super().__init__(opt, shared)
self.use_batch_act = self.bsz > 1
self.num_workers = opt['numworkers']
# One can specify a collate function to use for preparing a batch
collate_fn = opt.get('collate_fn', default_collate)
if not shared:
self.dataset = StreamDataset(opt)
self.pytorch_dataloader = DataLoader(
self.dataset,
batch_size=self.bsz,
shuffle=False,
sampler=sampler.SequentialSampler(self.dataset),
num_workers=self.num_workers,
collate_fn=collate_fn,
pin_memory=False,
drop_last=False,
)
self.lastYs = [None] * self.bsz
else:
self.dataset = shared['dataset']
self.pytorch_dataloader = shared['pytorch_dataloader']
self.lastYs = shared['lastYs']
self.num_batches = math.ceil(self.dataset.num_examples() / self.bsz)
self.reset()
def get_dataloaders(train_batchsize, val_batchsize):
kwargs = {'num_workers': 20, 'pin_memory': True}
input_size = INFO['model-info']['input-size']
base = '{}/{}'.format(os.environ['datadir-base'], INFO['dataset'])
train_dset = dset.ImageFolder('{}/{}'.format(base, 'Train'))
val_dset = dset.ImageFolder('{}/{}'.format(base, 'Val'))
labels = torch.from_numpy(np.array(train_dset.imgs)[:, 1].astype(int))
mapping = {}
for c in train_dset.classes:
if c in val_dset.classes:
mapping[train_dset.class_to_idx[c]] = val_dset.class_to_idx[c]
else:
mapping[
train_dset.class_to_idx[c]] = val_dset.class_to_idx['UNKNOWN']
mapping[-1] = val_dset.class_to_idx['UNKNOWN']
train_len = train_dset.__len__()
val_len = val_dset.__len__()
val_loader = DataLoader(val_dset,
batch_size=val_batchsize,
sampler=sampler.SequentialSampler(range(val_len)),
**kwargs)
imgs = np.array(val_dset.imgs)
return None, None, val_loader, None, mapping, imgs
def make_loader(self,
batch_size=16,
num_workers=0,
shuffle=False,
pin_memory=False,
resize_rate=10,
drop_last=False):
"""
CommandLine:
python ~/code/netharn/examples/yolo_voc.py YoloVOCDataset.make_loader
Example:
>>> # DISABLE_DOCTSET
>>> torch.random.manual_seed(0)
>>> self = YoloVOCDataset(split='train')
>>> self.augmenter = None
>>> loader = self.make_loader(batch_size=1, shuffle=True)
>>> # training batches should have multiple shapes
>>> shapes = set()
>>> for batch in ub.ProgIter(iter(loader), total=len(loader)):
>>> inputs, labels = batch
>>> # test to see multiscale works
>>> shapes.add(inputs.shape[-1])
>>> if len(shapes) > 1:
>>> break
>>> assert len(shapes) > 1
"""
import torch.utils.data.sampler as torch_sampler
assert len(self) > 0, 'must have some data'
if shuffle:
sampler = torch_sampler.RandomSampler(self)
resample_freq = resize_rate
else:
sampler = torch_sampler.SequentialSampler(self)
resample_freq = None
# use custom sampler that does multiscale training
batch_sampler = multiscale_batch_sampler.MultiScaleBatchSampler(
sampler,
batch_size=batch_size,
resample_freq=resample_freq,
drop_last=drop_last,
)
# torch.utils.data.sampler.WeightedRandomSampler
loader = torch_data.DataLoader(
self,
batch_sampler=batch_sampler,
collate_fn=nh.data.collate.padded_collate,
num_workers=num_workers,
pin_memory=pin_memory)
if loader.batch_size != batch_size:
try:
# Hack: ensure dataloader has batch size attr
loader._DataLoader__initialized = False
loader.batch_size = batch_size
loader._DataLoader__initialized = True
except Exception:
pass
return loader
def run_oof_binary(args,
session_backup,
read_img,
read_mask,
img_group_id_colname=None):
metadata = session_backup[f'metadata'][0]
if img_group_id_colname is not None:
for group_name, _ in metadata.groupby(by=img_group_id_colname):
os.makedirs(os.path.join(args.snapshots_root, args.snapshot,
'oof_inference', group_name),
exist_ok=True)
else:
os.makedirs(os.path.join(args.snapshots_root, args.snapshot,
'oof_inference'),
exist_ok=True)
for fold_id, _, val_set in session_backup['cv_split'][0]:
print(colored('====> ', 'green') + f'Loading fold [{fold_id}]')
net = load_fold(args, fold_id)
if args.tta:
raise NotImplementedError('TTA is not yet supported')
val_dataset = SegmentationDataset(
split=val_set,
trf=session_backup['val_trf'][0],
read_img=read_img,
read_mask=read_mask,
img_group_id_colname=img_group_id_colname)
val_loader = DataLoader(val_dataset,
batch_size=args.bs,
num_workers=args.n_threads,
sampler=sampler.SequentialSampler(val_dataset))
with torch.no_grad():
for batch in tqdm(val_loader,
total=len(val_loader),
desc=f'Predicting fold {fold_id}:'):
img = batch['img']
if img_group_id_colname is not None:
group_ids = batch['group_id']
else:
group_ids = None
fnames = batch['fname']
predicts = torch.sigmoid(
net(img)).mul(255).to('cpu').numpy().astype(np.uint8)
for idx, fname in enumerate(fnames):
pred_mask = predicts[idx].squeeze()
if img_group_id_colname is not None:
cv2.imwrite(
os.path.join(args.snapshots_root, args.snapshot,
'oof_inference', group_ids[idx],
fname), pred_mask)
else:
cv2.imwrite(
os.path.join(args.snapshots_root, args.snapshot,
'oof_inference', fname), pred_mask)
def get_simple_loader(dataset, batch_size=1):
kwargs = {'num_workers': 4} if device.type == "cuda" else {}
loader = DataLoader(dataset,
batch_size=batch_size,
sampler=sampler.SequentialSampler(dataset),
collate_fn=collate_MIL,
**kwargs)
return loader
def make_loader(self, batch_size=16, num_workers=0, shuffle=False,
pin_memory=False):
"""
Example:
>>> torch.random.manual_seed(0)
>>> dset = coco_api.CocoDataset(coco_api.demo_coco_data())
>>> self = YoloCocoDataset(dset, train=1)
>>> loader = self.make_loader(batch_size=1)
>>> train_iter = iter(loader)
>>> # training batches should have multiple shapes
>>> shapes = set()
>>> for batch in train_iter:
>>> shapes.add(batch[0].shape[-1])
>>> if len(shapes) > 1:
>>> break
>>> #assert len(shapes) > 1
>>> vali_loader = iter(loaders['vali'])
>>> vali_iter = iter(loaders['vali'])
>>> # vali batches should have one shape
>>> shapes = set()
>>> for batch, _ in zip(vali_iter, [1, 2, 3, 4]):
>>> shapes.add(batch[0].shape[-1])
>>> assert len(shapes) == 1
"""
assert len(self) > 0, 'must have some data'
if shuffle:
if True:
# If the data is not balanced we need to balance it
index_to_weight = self._training_sample_weights()
num_samples = len(self)
index_to_weight = index_to_weight[:num_samples]
sampler = torch_sampler.WeightedRandomSampler(index_to_weight,
num_samples,
replacement=True)
sampler.data_source = self # hack for use with multiscale
else:
sampler = torch_sampler.RandomSampler(self)
resample_freq = 10
else:
sampler = torch_sampler.SequentialSampler(self)
resample_freq = None
# use custom sampler that does multiscale training
batch_sampler = multiscale_batch_sampler.MultiScaleBatchSampler(
sampler, batch_size=batch_size, resample_freq=resample_freq,
)
# torch.utils.data.sampler.WeightedRandomSampler
loader = torch_data.DataLoader(self, batch_sampler=batch_sampler,
collate_fn=nh.data.collate.padded_collate,
num_workers=num_workers,
pin_memory=pin_memory)
if loader.batch_size != batch_size:
try:
loader.batch_size = batch_size
except Exception:
pass
return loader
def data_sampler(dataset, shuffle, distributed):
if distributed:
return DistributedSampler(dataset, shuffle=shuffle)
if shuffle:
return sampler.RandomSampler(dataset)
else:
return sampler.SequentialSampler(dataset)
def main():
data_dir = sys.argv[1]
hero2ix_dir = sys.argv[2]
# import DataFrame and hero2ix dictionary
heroes_df = pd.read_csv(data_dir, index_col=0)
hero2ix_df = pd.read_csv(hero2ix_dir, index_col=0)
heroes_df = heroes_df.dropna().reset_index(drop=True)
hero2ix = dict(zip(hero2ix_df.hero, hero2ix_df.ID))
# heroes = hero2ix_df['hero'].values
# train test split
split = int(len(heroes_df)*0.9)
heroes_train = heroes_df.iloc[:split]
heroes_test = heroes_df.iloc[split:]
# build dataset generator
train_gen = DataFrameIterator(heroes_train, hero2ix)
test_gen = DataFrameIterator(heroes_test, hero2ix)
# Use Dataloader class in pytorch to generate batched data
batch_size = 16
loader_train = DataLoader(train_gen, batch_size=batch_size,
sampler=sampler.RandomSampler(train_gen),
num_workers=4)
loader_test = DataLoader(test_gen, batch_size=batch_size,
sampler=sampler.SequentialSampler(test_gen),
num_workers=4)
# define model, totally three models in hetor2vec.py
model = CBOH(embedding_dim=10, heropool_size=len(hero2ix))
# define loss function
loss_function = nn.CrossEntropyLoss()
# run train
losses = train(model=model, dataloader=loader_train, loss_function=loss_function,
init_lr=0.1, epochs=20, lr_decay_epoch=8, print_epoch=2, gpu=False)
# check test accuracy
print('accuracy: ', accuracy(model, dataloader=loader_test,
batch_size=batch_size, gpu=False))
# save embeddings as numpy arrays
output_dir = './output/hero/hero_embeddings.npy'
save_embeddings(model, filename=output_dir)
# pickle model
pickle_dir = './output/hero/model.p'
pickle.dump(obj=model, file=open(pickle_dir, 'wb'))
# plot loss vs epoch
plot_loss(losses, './output/hero/loss_hitory.png')
# project embeddings to 2d plane
plot_embeddings(model, hero2ix)
def __init__(self, opt, shared=None):
opt['batch_sort'] = False
super().__init__(opt, shared)
self.use_batch_act = self.bsz > 1
self.num_workers = opt['numworkers']
self.batch_sort = opt.get('pytorch_teacher_batch_sort')
self.batch_cache_type = opt.get('batch_sort_cache')
self.batch_sort_field = opt.get('batch_sort_field')
# One can specify a collate function to use for preparing a batch
self.opt = opt.copy()
self.is_shared = shared is not None
dataset_classes = self.get_dataset_class(opt)
self.ordered = ('ordered' in self.datatype or
('stream' in self.datatype and not opt.get('shuffle')))
if not shared:
if len(dataset_classes) > 1:
datasets = []
for class_name, collate_fn, task_name in dataset_classes:
opt['pytorch_teacher_task'] = task_name
opt['task'] = task_name
datasets.append(class_name(opt))
self.collate_fn = collate_fn
self.dataset = ParlAIConcatDataset(datasets)
else:
class_name, self.collate_fn, task_name = dataset_classes[0]
self.dataset = class_name(opt)
if self.ordered or not self.training:
data_sampler = sampler.SequentialSampler(self.dataset)
pin_memory = False
else:
data_sampler = sampler.RandomSampler(self.dataset)
pin_memory = True
self.pytorch_dataloader = DataLoader(
self.dataset,
batch_size=self.bsz,
sampler=data_sampler,
num_workers=self.num_workers,
collate_fn=self.collate_fn,
pin_memory=pin_memory,
drop_last=False,
)
self.lastYs = [None] * self.bsz
if self.batch_sort:
self.loader_process = LoaderProcess(opt)
self.loader_process.start()
self.data = enumerate(self.pytorch_dataloader)
else:
self.dataset = shared['dataset']
self.pytorch_dataloader = shared['pytorch_dataloader']
self.lastYs = shared['lastYs']
self.data = shared['data']
self.num_batches = math.ceil(self.dataset.num_episodes() / self.bsz)
self.reset()
def __init__(self, dataset, batch_size, shuffle = True, drop_last = False):
# buckets list 根据contexts长度分组
self.buckets = bucket(dataset)
# 打乱 list
if shuffle:
np.random.shuffle(self.buckets)
random_samplers = [sampler.RandomSampler(bucket) for bucket in self.buckets]
else:
random_samplers = [sampler.SequentialSampler(bucket) for bucket in self.buckets]
self.sampler = [sampler.BatchSampler(s, batch_size, drop_last) for s in random_samplers]
def create_training_batch(train_data, batch_size):
'''
'''
students = train_data.keys()
stud_ids = [stud_id for stud_id in students]
batches = list(
sampler.BatchSampler(sampler.SequentialSampler(stud_ids),
batch_size=batch_size,
drop_last=False))
batch_ids = []
for batch in batches:
batch_ids.append([stud_ids[i] for i in batch])
return batch_ids
def __init__(self,
data_source,
shuffle=False,
batch_size=16,
drop_last=False,
resample_frequency=10):
if shuffle:
self.sampler = torch_sampler.RandomSampler(data_source)
else:
self.sampler = torch_sampler.SequentialSampler(data_source)
self.shuffle = shuffle
self.batch_size = batch_size
self.drop_last = drop_last
self.num_scales = len(data_source.multi_scale_inp_size)
self.resample_frequency = resample_frequency
def create_dataloader(config, data, mode):
dataset = create_dataset(config, data, mode)
if mode == 'train':
# create Sampler
if dist.is_available() and dist.is_initialized():
train_RandomSampler = distributed.DistributedSampler(dataset)
else:
train_RandomSampler = sampler.RandomSampler(dataset, replacement=False)
train_BatchSampler = sampler.BatchSampler(train_RandomSampler,
batch_size=config.train.batch_size,
drop_last=config.train.dataloader.drop_last)
# Augment
collator = get_collate_fn(config)
# DataLoader
data_loader = DataLoader(dataset=dataset,
batch_sampler=train_BatchSampler,
collate_fn=collator,
pin_memory=config.train.dataloader.pin_memory,
num_workers=config.train.dataloader.work_nums)
elif mode == 'val':
if dist.is_available() and dist.is_initialized():
val_SequentialSampler = distributed.DistributedSampler(dataset)
else:
val_SequentialSampler = sampler.SequentialSampler(dataset)
val_BatchSampler = sampler.BatchSampler(val_SequentialSampler,
batch_size=config.val.batch_size,
drop_last=config.val.dataloader.drop_last)
data_loader = DataLoader(dataset,
batch_sampler=val_BatchSampler,
pin_memory=config.val.dataloader.pin_memory,
num_workers=config.val.dataloader.work_nums)
else:
if dist.is_available() and dist.is_initialized():
test_SequentialSampler = distributed.DistributedSampler(dataset)
else:
test_SequentialSampler = None
data_loader = DataLoader(dataset,
sampler=test_SequentialSampler,
batch_size=config.test.batch_size,
pin_memory=config.val.dataloader.pin_memory,
num_workers=config.val.dataloader.work_nums)
return data_loader
def __init__(self, opt, shared=None):
opt['batch_sort'] = False
super().__init__(opt, shared)
self.use_batch_act = self.bsz > 1
self.num_workers = opt['numworkers']
self.batch_cache_type = opt.get('batch_sort_cache')
# One can specify a collate function to use for preparing a batch
self.opt = copy.deepcopy(opt)
self.is_shared = shared is not None
dataset_class, self.collate_fn = self.get_dataset_class(opt)
opt['dataset_class'] = dataset_class
opt['collate_fn'] = self.collate_fn
if not shared:
self.dataset = dataset_class(opt)
if self.datatype == 'train' and not isinstance(
self.dataset, StreamDataset):
data_sampler = sampler.RandomSampler(self.dataset)
else:
data_sampler = sampler.SequentialSampler(self.dataset)
pin_memory = not isinstance(self.dataset, StreamDataset)
self.pytorch_dataloader = DataLoader(
self.dataset,
batch_size=self.bsz,
shuffle=False,
sampler=data_sampler,
num_workers=self.num_workers,
collate_fn=self.collate_fn,
pin_memory=pin_memory,
drop_last=False,
)
self.lastYs = [None] * self.bsz
if self.batch_cache_type != 'none':
self.loader_process = LoaderProcess(opt)
self.loader_process.start()
self.data = enumerate(self.pytorch_dataloader)
else:
self.dataset = shared['dataset']
self.pytorch_dataloader = shared['pytorch_dataloader']
self.lastYs = shared['lastYs']
self.data = shared['data']
self.num_batches = math.ceil(self.dataset.num_episodes() / self.bsz)
self.reset()
def __init__(self, opt):
super().__init__(daemon=True)
self.dataset = opt['dataset_class'](opt)
self.bsz = opt.get('batchsize', 1)
self.num_workers = opt.get('num_workers', 4)
collate_fn = opt.get('collate_fn', default_collate)
self.dataloader = DataLoader(
self.dataset,
batch_size=self.bsz,
shuffle=False,
sampler=sampler.SequentialSampler(self.dataset),
num_workers=self.num_workers,
collate_fn=collate_fn,
pin_memory=False,
drop_last=False,
)
self.datatype = opt.get('datatype')
self.data = enumerate(self.dataloader)
self.batch_cache_type = opt.get('batch_sort_cache')
self.batch_length_range = opt.get('batch_length_range')
def make_train_valid_loaders(self,
distributed=False
) -> Tuple[DataLoader, DataLoader]:
train_dataset, valid_dataset = self.make_train_valid_datasets()
train_weights = torch.DoubleTensor(
[1.0] * len(train_dataset)) # uniform sampling
train_sampler = sampler.WeightedRandomSampler(
weights=train_weights,
num_samples=self._data_params['batch_size'] *
self._data_params['steps_per_epoch'],
)
train_loader = self._make_loader(train_dataset,
train_sampler,
mode='train',
distributed=distributed)
valid_loader = self._make_loader(
valid_dataset,
sampler.SequentialSampler(valid_dataset),
mode='valid',
distributed=distributed,
)
return train_loader, valid_loader
def evaluate_pred(config):
# define directories
model_name = config.model
test_data_root = config.data_root
if config.deep_pred > 1:
test_dir = config.test_dir + '/' + config.experiment_name + '/deep-pred{}/'.format(
config.deep_pred) + model_name
else:
test_dir = config.test_dir + '/' + config.experiment_name + '/pred/' + model_name
if not os.path.exists(test_dir):
os.makedirs(test_dir)
sample_dir = test_dir + '/samples'
if not os.path.exists(sample_dir):
os.makedirs(sample_dir)
nframes_in = config.nframes_in
nframes_pred = config.nframes_pred * config.deep_pred
nframes = nframes_in + nframes_pred
img_size = int(config.resl)
nworkers = 4
# load model
if config.model == 'FutureGAN':
ckpt = torch.load(config.model_path)
# model structure
G = ckpt['G_structure']
# load model parameters
G.load_state_dict(ckpt['state_dict'])
G.eval()
G = G.module.model
if use_cuda:
G = G.cuda()
print(' ... loading FutureGAN`s FutureGenerator from checkpoint: {}'.
format(config.model_path))
# load test dataset
transform = transforms.Compose([
transforms.Resize(size=(img_size, img_size),
interpolation=Image.NEAREST),
transforms.ToTensor(),
])
if config.model == 'FutureGAN' or config.model == 'CopyLast':
dataset_gt = VideoFolder(video_root=test_data_root,
video_ext=config.ext,
nframes=nframes,
loader=video_loader,
transform=transform)
dataloader_gt = DataLoader(
dataset=dataset_gt,
batch_size=config.batch_size,
sampler=sampler.SequentialSampler(dataset_gt),
num_workers=nworkers)
else:
dataset_gt = VideoFolder(video_root=test_data_root + '/in_gt',
video_ext=config.ext,
nframes=nframes,
loader=video_loader,
transform=transform)
dataset_pred = VideoFolder(video_root=test_data_root + '/in_pred',
video_ext=config.ext,
nframes=nframes,
loader=video_loader,
transform=transform)
dataloader_pred = DataLoader(
dataset=dataset_pred,
batch_size=config.batch_size,
sampler=sampler.SequentialSampler(dataset_pred),
num_workers=nworkers)
dataloader_gt = DataLoader(
dataset=dataset_gt,
batch_size=config.batch_size,
sampler=sampler.SequentialSampler(dataset_gt),
num_workers=nworkers)
data_iter_pred = iter(dataloader_pred)
test_len = len(dataset_gt)
data_iter_gt = iter(dataloader_gt)
# save model structure to file
if config.model == 'FutureGAN':
# count model parameters
nparams_g = count_model_params(G)
with open(
test_dir +
'/model_structure_{}x{}.txt'.format(img_size, img_size),
'w') as f:
print('--------------------------------------------------', file=f)
print('Sequences in test dataset: ', len(dataset_gt), file=f)
print('Number of model parameters: ', file=f)
print(nparams_g, file=f)
print('--------------------------------------------------', file=f)
print('Model structure: ', file=f)
print(G, file=f)
print('--------------------------------------------------', file=f)
print(
' ... FutureGAN`s FutureGenerator has been loaded successfully from checkpoint ... '
)
print(' ... saving model struture to {}'.format(f))
# save test configuration
with open(test_dir + '/eval_config.txt', 'w') as f:
print('------------- test configuration -------------', file=f)
for l, m in vars(config).items():
print(('{}: {}').format(l, m), file=f)
print(' ... loading test configuration ... ')
print(' ... saving test configuration {}'.format(f))
# define tensors
if config.model == 'FutureGAN':
print(' ... testing FutureGAN ...')
if config.deep_pred > 1:
print(
' ... recursively predicting {}x{} future frames from {} input frames ...'
.format(config.deep_pred, config.nframes_pred, nframes_in))
else:
print(' ... predicting {} future frames from {} input frames ...'.
format(nframes_pred, nframes_in))
z = Variable(
torch.FloatTensor(config.batch_size, config.nc, nframes_in, img_size,
img_size))
z_in = Variable(
torch.FloatTensor(config.batch_size, config.nc, nframes_in, img_size,
img_size))
x_pred = Variable(
torch.FloatTensor(config.batch_size, config.nc, nframes_pred, img_size,
img_size))
x = Variable(
torch.FloatTensor(config.batch_size, config.nc, nframes, img_size,
img_size))
x_eval = Variable(
torch.FloatTensor(config.batch_size, config.nc, nframes_pred, img_size,
img_size))
# define tensors for evaluation
if config.metrics is not None:
print(' ... evaluating {} ...'.format(model_name))
if 'ms_ssim' in config.metrics and img_size < 32:
raise ValueError(
'For calculating `ms_ssim`, your dataset must consist of images at least of size 32x32!'
)
metrics_values = {}
for metric_name in config.metrics:
metrics_values['{}_frames'.format(metric_name)] = torch.zeros_like(
torch.FloatTensor(test_len, nframes_pred))
metrics_values['{}_avg'.format(metric_name)] = torch.zeros_like(
torch.FloatTensor(test_len, 1))
print(' ... calculating {} ...'.format(metric_name))
# test loop
if config.metrics is not None:
metrics_i_video = {}
for metric_name in config.metrics:
metrics_i_video['{}_i_video'.format(metric_name)] = 0
i_save_video = 1
i_save_gif = 1
for step in tqdm(range(len(data_iter_gt))):
# input frames
x.data = next(data_iter_gt)
x_eval.data = x.data[:, :, nframes_in:, :, :]
z.data = x.data[:, :, :nframes_in, :, :]
if use_cuda:
x = x.cuda()
x_eval = x_eval.cuda()
z = z.cuda()
x_pred = x_pred.cuda()
# predict video frames
# !!! TODO !!! for deep_pred > 1: correctly implemented only if nframes_in == nframes_pred
if config.model == 'FutureGAN':
z_in.data = z.data
for i_deep_pred in range(0, config.deep_pred):
x_pred[:z_in.size(0), :, i_deep_pred *
config.nframes_pred:(i_deep_pred *
config.nframes_pred) +
config.nframes_pred, :, :] = G(z_in).detach()
z_in.data = x_pred.data[:, :,
i_deep_pred * config.nframes_pred:
(i_deep_pred * config.nframes_pred) +
config.nframes_pred, :, :]
elif config.model == 'CopyLast':
for i_baseline_frame in range(x_pred.size(2)):
x_pred.data[:x.size(0), :,
i_baseline_frame, :, :] = x.data[:, :, nframes_in -
1, :, :]
else:
x_pred.data = next(data_iter_pred)[:x.size(0), :,
nframes_in:, :, :]
# calculate eval statistics
if config.metrics is not None:
for metric_name in config.metrics:
calculate_metric = getattr(eval_metrics,
'calculate_{}'.format(metric_name))
for i_batch in range(x.size(0)):
for i_frame in range(nframes_pred):
metrics_values['{}_frames'.format(metric_name)][
metrics_i_video['{}_i_video'.format(metric_name)],
i_frame] = calculate_metric(
x_pred[i_batch, :, i_frame, :, :],
x_eval[i_batch, :, i_frame, :, :])
metrics_values['{}_avg'.format(metric_name)][
metrics_i_video['{}_i_video'.format(
metric_name)]] = torch.mean(
metrics_values['{}_frames'.format(
metric_name)][metrics_i_video[
'{}_i_video'.format(metric_name)]])
metrics_i_video['{}_i_video'.format(
metric_name
)] = metrics_i_video['{}_i_video'.format(metric_name)] + 1
# save frames
if config.save_frames_every is not 0 and config.model == 'FutureGAN':
if step % config.save_frames_every == 0 or step == 0:
for i_save_batch in range(x.size(0)):
if not os.path.exists(
sample_dir +
'/in_gt/video{:04d}'.format(i_save_video)):
os.makedirs(sample_dir +
'/in_gt/video{:04d}'.format(i_save_video))
if not os.path.exists(
sample_dir +
'/in_pred/video{:04d}'.format(i_save_video)):
os.makedirs(
sample_dir +
'/in_pred/video{:04d}'.format(i_save_video))
for i_save_z in range(z.size(2)):
save_image_grid(
z.data[i_save_batch, :,
i_save_z, :, :].unsqueeze(0), sample_dir +
'/in_gt/video{:04d}/video{:04d}_frame{:04d}_R{}x{}.png'
.format(i_save_video, i_save_video, i_save_z + 1,
img_size, img_size), img_size, 1)
save_image_grid(
z.data[i_save_batch, :,
i_save_z, :, :].unsqueeze(0), sample_dir +
'/in_pred/video{:04d}/video{:04d}_frame{:04d}_R{}x{}.png'
.format(i_save_video, i_save_video, i_save_z + 1,
img_size, img_size), img_size, 1)
for i_save_x_pred in range(x_pred.size(2)):
save_image_grid(
x_eval.data[i_save_batch, :,
i_save_x_pred, :, :].unsqueeze(0),
sample_dir +
'/in_gt/video{:04d}/video{:04d}_frame{:04d}_R{}x{}.png'
.format(i_save_video, i_save_video, i_save_x_pred +
1 + nframes_in, img_size, img_size),
img_size, 1)
save_image_grid(
x_pred.data[i_save_batch, :,
i_save_x_pred, :, :].unsqueeze(0),
sample_dir +
'/in_pred/video{:04d}/video{:04d}_frame{:04d}_R{}x{}.png'
.format(i_save_video, i_save_video, i_save_x_pred +
1 + nframes_in, img_size, img_size),
img_size, 1)
i_save_video = i_save_video + 1
# save gifs
if config.save_gif_every is not 0:
if step % config.save_gif_every == 0 or step == 0:
for i_save_batch in range(x.size(0)):
if not os.path.exists(
sample_dir +
'/in_gt/video{:04d}'.format(i_save_gif)):
os.makedirs(sample_dir +
'/in_gt/video{:04d}'.format(i_save_gif))
if not os.path.exists(
sample_dir +
'/in_pred/video{:04d}'.format(i_save_gif)):
os.makedirs(sample_dir +
'/in_pred/video{:04d}'.format(i_save_gif))
frames = []
for i_save_z in range(z.size(2)):
frames.append(
get_image_grid(
z.data[i_save_batch, :,
i_save_z, :, :].unsqueeze(0), img_size,
1, config.in_border, config.npx_border))
for i_save_x_pred in range(x_pred.size(2)):
frames.append(
get_image_grid(
x_eval.data[i_save_batch, :,
i_save_x_pred, :, :].unsqueeze(0),
img_size, 1, config.out_border,
config.npx_border))
imageio.mimsave(
sample_dir +
'/in_gt/video{:04d}/video{:04d}_R{}x{}.gif'.format(
i_save_gif, i_save_gif, img_size, img_size),
frames)
frames = []
for i_save_z in range(z.size(2)):
frames.append(
get_image_grid(
z.data[i_save_batch, :,
i_save_z, :, :].unsqueeze(0), img_size,
1, config.in_border, config.npx_border))
for i_save_x_pred in range(x_pred.size(2)):
frames.append(
get_image_grid(
x_pred.data[i_save_batch, :,
i_save_x_pred, :, :].unsqueeze(0),
img_size, 1, config.out_border,
config.npx_border))
imageio.mimsave(
sample_dir +
'/in_pred/video{:04d}/video{:04d}_R{}x{}.gif'.format(
i_save_gif, i_save_gif, img_size, img_size),
frames)
i_save_gif = i_save_gif + 1
if config.save_frames_every is not 0 and config.model == 'FutureGAN':
print(' ... saving video frames to dir: {}'.format(sample_dir))
if config.save_gif_every is not 0:
print(' ... saving gifs to dir: {}'.format(sample_dir))
# calculate and save mean eval statistics
if config.metrics is not None:
metrics_mean_values = {}
for metric_name in config.metrics:
metrics_mean_values['{}_frames'.format(metric_name)] = torch.mean(
metrics_values['{}_frames'.format(metric_name)], 0)
metrics_mean_values['{}_avg'.format(metric_name)] = torch.mean(
metrics_values['{}_avg'.format(metric_name)], 0)
torch.save(
metrics_mean_values['{}_frames'.format(metric_name)],
os.path.join(test_dir, '{}_frames.pt'.format(metric_name)))
torch.save(metrics_mean_values['{}_avg'.format(metric_name)],
os.path.join(test_dir, '{}_avg.pt'.format(metric_name)))
print(' ... saving evaluation statistics to dir: {}'.format(test_dir))
def __init__(self, opt, shared=None):
opt['batch_sort'] = False
super().__init__(opt, shared)
self.use_batch_act = self.bsz > 1
self.num_workers = opt['numworkers']
self.batch_sort = opt.get('pytorch_teacher_batch_sort') and \
'train' in self.datatype
self.batch_cache_type = opt.get('batch_sort_cache_type')
self.batch_sort_field = opt.get('batch_sort_field')
# One can specify a collate function to use for preparing a batch
self.opt = opt.copy()
self.is_shared = shared is not None
dataset_classes = self.get_dataset_class(opt)
self.ordered = ('ordered' in self.datatype or
('stream' in self.datatype and not opt.get('shuffle')))
if self.ordered:
# force index for ordered, so that we see every example
warn_once('\nNote: You are using PytorchDataTeacher with ordered '
'examples. Please specify `--shuffle` if you would like '
'to have examples loaded in randomized order.\n')
self.batch_cache_type = 'index'
if not shared:
BatchSortCache.create()
if len(dataset_classes) > 1:
datasets = []
for class_name, collate_fn, task_name in dataset_classes:
dataset_opt = opt.copy()
dataset_opt['pytorch_teacher_task'] = task_name
dataset_opt['task'] = task_name
datasets.append(class_name(dataset_opt))
self.collate_fn = collate_fn
self.id = ','.join([d[2] for d in dataset_classes])
self.dataset = ParlAIConcatDataset(datasets)
else:
class_name, self.collate_fn, task_name = dataset_classes[0]
self.id = task_name
self.dataset = class_name(opt)
if self.ordered or not self.training:
data_sampler = sampler.SequentialSampler(self.dataset)
else:
data_sampler = sampler.RandomSampler(self.dataset)
self.pytorch_dataloader = DataLoader(
self.dataset,
batch_size=self.bsz,
sampler=data_sampler,
num_workers=self.num_workers,
collate_fn=self.collate_fn,
pin_memory=False,
drop_last=False,
)
self.lastYs = [None] * self.bsz
if self.batch_sort:
self.loader_process = LoaderProcess(opt)
self.loader_process.start()
self.data = enumerate(self.pytorch_dataloader)
else:
self.dataset = shared['dataset']
self.pytorch_dataloader = shared['pytorch_dataloader']
self.lastYs = shared['lastYs']
self.data = shared['data']
self.id = shared['id']
self.num_batches = math.ceil(self.dataset.num_episodes() / self.bsz)
self.reset()
def train_sup(self, epoch_lim, data, valid_data, early_stopping_lim,
batch_size, num_workers, track_embeddings, validation_rate, loss_weight_base=1,
value_weight=0, value_ratio=0):
"""
Training loop
:param epoch_lim: total number of training epochs
:param data: training data
:param valid_data: validation data
:param early_stopping_lim: Number of epochs to run without validation improvement before stopping
if None, never stop early
:param batch_size: training batch_size
:param num_workers: number of CPU workers to use for data loading
:param track_embeddings: Save out embedding information at end of run
:param validation_rate: Check validation performance every validation_rate training epochs
:param loss_weight_base: A constant between 0 and 1 used to interpolate between Single (=0) and Multi (=1) Step forecasting.
:param value_weight: A constant multiplier for the real-value loss, set to 0 in the paper
:param value_ratio: The proportion of loss used for the MSE loss term (as opposed for the cross-entropy loss), set to 0 in the paper
:return loss array, model:
"""
if early_stopping_lim is None:
early_stopping_lim = epoch_lim
train_sampler = sampler.RandomSampler(np.arange(len(data)))
data_train = DataLoader(data,
batch_size=batch_size,
sampler=train_sampler,
drop_last=True)
valid_sampler = sampler.SequentialSampler(np.arange(len(valid_data)))
data_valid = DataLoader(valid_data,
batch_size=batch_size,
sampler=valid_sampler)
step = 0
bsf_loss = np.inf
epochs_without_improvement = 0
improvements = []
for epoch in range(epoch_lim):
if epochs_without_improvement > early_stopping_lim:
print('Exceeded early stopping limit, stopping')
break
if epoch % validation_rate == 0:
valid_loss = self.validation(data_valid=data_valid,
step=step,
data=data,
loss_weight_base=loss_weight_base,
value_weight=value_weight, value_ratio=value_ratio)
(bsf_loss,
epochs_without_improvement,
improvements) = self.manage_early_stopping(bsf_loss=bsf_loss,
early_stopping_lim=early_stopping_lim,
epochs_without_improvement=epochs_without_improvement,
valid_loss=valid_loss, validation_rate=validation_rate,
improvements=improvements)
running_train_loss = 0
for inp, out, out_real, lens in tqdm(data_train):
loss, y_p = forecast_model.get_loss(inp=inp,
out=out,
lens=lens,
cuda=True,
gn=self.model,
glucose_dat=data,
criterion=self.criterion,
base=loss_weight_base,
out_real=out_real,
value_weight=value_weight,
value_ratio=value_ratio)
step += 1
running_train_loss += loss.data.cpu().numpy()[0]
self.optimizer.zero_grad()
loss.backward()
self.optimizer.step()
running_train_loss = running_train_loss/len(data_train)
self.writer.add_scalar(tag='train_loss',
scalar_value=running_train_loss,
global_step=step)
torch.save(self.model.state_dict(), '{}/final_sup.pt'.format(self.model_dir))
if track_embeddings:
self.embed(data_valid, step, embed_batch=100)
return improvements
def main():
data_dir = sys.argv[1]
hero2ix_dir = sys.argv[2]
# import DataFrame and hero2ix dictionary
heroes_df_dota = pd.read_csv(data_dir, index_col=0)
heroes_df_dota = heroes_df_dota.dropna().reset_index(drop=True)
with open(hero2ix_dir, 'r') as fp:
hero2ix = json.load(fp)
print(len(heroes_df_dota))
# train test split
split_1 = int(len(heroes_df_dota) * 0.8)
split_2 = int(len(heroes_df_dota) * 0.9)
heroes_train_dota = heroes_df_dota.iloc[:split_1]
heroes_dev_dota = heroes_df_dota.iloc[split_1:split_2]
heroes_test_dota = heroes_df_dota.iloc[split_2:]
# build dataset generator
train_gen = DataFrameIterator(heroes_train_dota, hero2ix)
dev_gen = DataFrameIterator(heroes_dev_dota, hero2ix)
test_gen = DataFrameIterator(heroes_test_dota, hero2ix)
# Use Dataloader class in pytorch to generate batched data
batch_size = 16
loader_train = DataLoader(train_gen,
batch_size=batch_size,
sampler=sampler.RandomSampler(train_gen),
num_workers=4)
loader_dev = DataLoader(dev_gen,
batch_size=batch_size,
sampler=sampler.RandomSampler(dev_gen),
num_workers=4)
loader_test = DataLoader(test_gen,
batch_size=batch_size,
sampler=sampler.SequentialSampler(test_gen),
num_workers=4)
# define model, totally three models in hetor2vec.py
# model = CBOHBilayer(embedding_dim=20, heropool_size=len(hero2ix))
model = CBOHBilayer(embedding_dim=20,
heropool_size=len(hero2ix),
hidden_dim=20)
# define loss function
loss_function = nn.CrossEntropyLoss()
# run train
losses = train(model=model,
dataloader=loader_train,
devloader=loader_dev,
loss_function=loss_function,
init_lr=0.1,
epochs=20,
lr_decay_epoch=8,
print_epoch=2,
gpu=True)
# check test accuracy
print(
'Top3, Top5 and Top 10 accuracy: ',
accuracy_in_train(model,
dataloader=loader_test,
batch_size=batch_size,
gpu=False))
# save embeddings as numpy arrays
output_dir = './output/hero/hero_embeddings.npy'
save_embeddings(model, filename=output_dir)
# pickle model
pickle_dir = './output/hero/model.p'
pickle.dump(obj=model, file=open(pickle_dir, 'wb'))
# np.save('loss0',losses[0])
# np.save('loss1',losses[1])
# np.save('loss2',losses[2])
# np.save('loss3',losses[3])
# # plot loss vs epoch
plot_loss(losses, './output/hero/loss_hitory.png')
# project embeddings to 2d plane
plot_embeddings(model, hero2ix)
drop_last = kwargs.get('drop_last', False)
if isinstance(sampler, torchsampler.BatchSampler):
return sampler
if sampler == None:
sampler = torchsampler.RandomSampler(self.dataset)
elif not isinstance(sampler, torchsampler.Sampler):
sampler = torchsampler.RandomSampler(sampler)
return torchsampler.BatchSampler(sampler, batch_size, drop_last)
# Test this module
if __name__ == '__main__':
N_TESTS = 4
passed = 0
dataset = Dataset(transform=unrel.TRANSFORM)
# Test on a subset sampler
batch_sampler = torchsampler.SequentialSampler(range(14))
dataloader = FauxDataLoader(dataset, sampler=batch_sampler)
for batch_i, batch in enumerate(dataloader):
assert isinstance(batch['image'], list)
for image in batch['image']:
assert isinstance(image, torch.Tensor)
print('dataset count %3d / %3d' % ((1+batch_i) * dataloader.sampler.batch_size, len(dataloader)))
passed += 1; print('OK %d/%d' % (passed, N_TESTS))
# Test on a batched subset sampler
batch_sampler = torchsampler.BatchSampler(torchsampler.SequentialSampler(range(14)), 3, False)
dataloader = FauxDataLoader(dataset, sampler=batch_sampler)
for batch_i, batch in enumerate(dataloader):
assert isinstance(batch['image'], list)
for image in batch['image']:
assert isinstance(image, torch.Tensor)
print('dataset count %3d / %3d' % ((1+batch_i) * dataloader.sampler.batch_size, len(dataloader)))
def train_template_network(loss='default'):
"""Obtain CIFAR10-trained template network.
Training parameters follow original ResNet paper.
Args:
loss: Choose from 'default'/'sgm'/'l2'
"""
# Use training parameters of original ResNet paper
split_index = 45000
batch_size = 128
lr = 1e-1
momentum = 0.9
weight_decay = 1e-4
epoch = 180
decay_milestones = [90, 120]
decay_factor = 0.1
# SGM/L2 specific parameters
aux_loss_wt = 0.02
train_transform = transforms.Compose([
transforms.RandomHorizontalFlip(),
transforms.RandomCrop(32, 4),
transforms.ToTensor(),
transforms.Normalize([0.485, 0.456, 0.406], [0.229, 0.224, 0.225])
])
test_transform = transforms.Compose([
transforms.ToTensor(),
transforms.Normalize([0.485, 0.456, 0.406], [0.229, 0.224, 0.225])
])
image_datasets = {
x: datasets.CIFAR10(root=args.cifar10_dir,
train=y,
download=True,
transform=z)
for x, y, z in zip([0, 1], [True, False],
[train_transform, test_transform])
}
dataloaders = {
x: DataLoader(image_datasets[y],
batch_size=batch_size,
sampler=z,
num_workers=args.num_workers,
pin_memory=('cpu' not in args.device))
for x, y, z in zip(['train', 'val', 'test'], [0, 0, 1], [
sampler.SubsetRandomSampler(range(split_index)),
sampler.SubsetRandomSampler(
range(split_index, len(image_datasets[0]))),
sampler.SequentialSampler(image_datasets[1])
])
}
dataset_sizes = {
'train': split_index,
'val': len(image_datasets[0]) - split_index,
'test': len(image_datasets[1])
}
model = mutil.get_model(args.arch).to(device)
if loss == 'default':
criterion = torch.nn.CrossEntropyLoss().to(device)
elif loss in ('sgm', 'l2'):
criterion = GenericLoss(loss, aux_loss_wt, model.linear.out_features)
else:
raise NameError('{} is not recognized.'.format(loss))
optimizer = torch.optim.SGD(mutil.get_model_trainable_parameters(model),
lr=lr,
momentum=momentum,
weight_decay=weight_decay)
scheduler = torch.optim.lr_scheduler.MultiStepLR(
optimizer, milestones=decay_milestones, gamma=decay_factor)
model, _ = mutil.train_model(model,
criterion,
optimizer,
dataloaders,
dataset_sizes,
scheduler=scheduler,
num_epochs=epoch,
device=device)
mutil.eval_model(model,
dataloaders['test'],
dataset_sizes['test'],
device=device)
return model
def extract_activation(self, data, labels=None, customfunction=None):
datapath = None
cachekey, cacheddata = get_cached_data(data, self.modelpath, self.layers, \
conditional=self.conditional, classpath=self.classpath, customfunction=customfunction)
if cachekey is not None:
if isinstance(cacheddata, tuple):
return cacheddata[0], cacheddata[1]
else:
return cacheddata, None
self.activations = collections.defaultdict(list)
if isinstance(data, str):
datapath = data
data = np.load(data)
elif isinstance(data, np.ndarray):
data = data
if isinstance(labels, str):
labels = np.load(labels)
elif isinstance(labels, np.ndarray):
labels = labels
channel = data.shape[3]
# transpose data if data in nhwc format i.e channel is 3
#TODO more elegant to assert that the shape of the data based on the input expected by the model
if channel == 3:
data = data.transpose(0, 3, 1, 2)
torchdata = torch.stack([torch.Tensor(i) for i in data])
dataset = tdata.TensorDataset(torchdata)
dataloader = tdata.DataLoader(dataset, batch_size=100, shuffle=False, num_workers=2, \
sampler=sampler.SequentialSampler(dataset))
y_prob = None
for idx, inputs in enumerate(dataloader):
y_pred = self.modelinstance(inputs[0])
y_prob_ = np.argmax(y_pred.detach().numpy(), axis=1)
if y_prob is None:
y_prob = y_prob_
else:
y_prob = np.concatenate((y_prob, y_prob_), axis=0)
# break;
activations = {
name: torch.cat(outputs, 0)
for name, outputs in self.activations.items()
}
merged_acts = None
if (not activations):
raise ValueError('Could not extract from specified layer')
for _, act in activations.items():
act = act.detach().numpy()
# apply transformation on activations as defined by custom function
if customfunction is not None and callable(customfunction):
_acts = customfunction(act)
act = _acts
if len(act.shape) == 4:
act = np.reshape(
act,
(act.shape[0], act.shape[1] * act.shape[2] * act.shape[3]))
else:
act = np.reshape(act, (act.shape[0], act.shape[1]))
if merged_acts is None:
merged_acts = act
else:
merged_acts = np.concatenate((merged_acts, act), axis=-1)
if self.conditional:
if (labels is not None):
y_prob = labels
y_prob = y_prob.reshape((-1, ))
unique_labels = set(y_prob)
conditional_f_acts = {}
for label in unique_labels:
indices = [x == label for x in y_prob]
selected_f_acts = merged_acts[indices]
conditional_f_acts[label] = selected_f_acts
cachekey = write_to_cache(conditional_f_acts, datapath, self.modelpath, self.layers, \
classpath=self.classpath, conditional=self.conditional)
return conditional_f_acts, None
else:
cachekey = write_to_cache((merged_acts, y_prob), datapath, self.modelpath, self.layers, \
classpath=self.classpath, conditional=self.conditional)
return merged_acts, y_prob
weight_method=params['weight_method'],
create_cache=params['create_cache'],
num_channels=1))
dataset = ConcatDataset(dataset) if len(dataset) > 1 else dataset[0]
target_type = params['target_type'] if params['target_type'] != 'spatial_bootstrap' else 'psa'
val_dataset = WSJ0(folder=params['validation_folder'],
length='full',
n_fft=params['n_fft'],
hop_length=params['hop_length'],
output_type=target_type,
create_cache=True, #params['create_cache'],
num_channels=1)
if args.sample_strategy == 'sequential':
sample_strategy = sampler.SequentialSampler(dataset)
elif args.sample_strategy == 'random':
sample_strategy = sampler.RandomSampler(dataset)
dataloader = DataLoader(dataset,
batch_size=params['batch_size'],
num_workers=params['num_workers'],
sampler=sample_strategy)
dummy_input, _, _, _, _, dummy_one_hot = dataset[0]
params['num_attractors'] = dummy_one_hot.shape[-1]
params['num_sources'] = params['num_attractors']
params['sample_rate'] = dataset.sr
dataset.reorder_sources = args.reorder_sources
val_dataset.reorder_sources = args.reorder_sources
