def test_from_pretrained(tmpdir):
vae = VAE(input_height=32)
ae = AE(input_height=32)
assert len(VAE.pretrained_weights_available()) > 0
assert len(AE.pretrained_weights_available()) > 0
exception_raised = False
try:
vae = vae.from_pretrained('cifar10-resnet18')
vae = vae.from_pretrained(
'stl10-resnet18'
) # try loading weights not compatible with exact architecture
ae = ae.from_pretrained('cifar10-resnet18')
except Exception as e:
exception_raised = True
assert exception_raised is False, "error in loading weights"
keyerror = False
try:
vae = vae.from_pretrained('abc')
ae = ae.from_pretrained('xyz')
except KeyError:
keyerror = True
assert keyerror is True, "KeyError not raised when provided with illegal checkpoint name"
def simple_vae_example():
from pl_bolts.models.autoencoders import VAE
from pytorch_lightning.plugins import DDPPlugin
# Data.
train_dataset = torchvision.datasets.CIFAR10(
"",
train=True,
download=True,
transform=torchvision.transforms.ToTensor())
val_dataset = torchvision.datasets.CIFAR10(
"",
train=False,
download=True,
transform=torchvision.transforms.ToTensor())
train_loader = torch.utils.data.DataLoader(train_dataset,
batch_size=32,
num_workers=12)
#train_loader = torch.utils.data.DataLoader(train_dataset, batch_size=32, num_workers=12, persistent_workers=True)
val_loader = torch.utils.data.DataLoader(val_dataset,
batch_size=32,
num_workers=12)
#val_loader = torch.utils.data.DataLoader(val_dataset, batch_size=32, num_workers=12, persistent_workers=True)
# Model.
model = VAE(input_height=32)
"""
# Override any part of this AE to build your own variation.
class MyVAEFlavor(VAE):
def get_posterior(self, mu, std):
# Do something other than the default.
P = self.get_distribution(self.prior, loc=torch.zeros_like(mu), scale=torch.ones_like(std))
return P
model = MyVAEFlavor(...)
"""
# Fit.
trainer = pl.Trainer(gpus=2,
accelerator="ddp",
plugins=DDPPlugin(find_unused_parameters=False))
trainer.fit(model, train_loader, val_loader)
#--------------------
# CIFAR-10 pretrained model:
vae = VAE(input_height=32)
print(VAE.pretrained_weights_available())
vae = vae.from_pretrained("cifar10-resnet18")
vae.freeze()
def test_from_pretrained(datadir):
dm = CIFAR10DataModule(data_dir=datadir, batch_size=4)
dm.setup()
dm.prepare_data()
data_loader = dm.val_dataloader()
vae = VAE(input_height=32)
ae = AE(input_height=32)
assert len(VAE.pretrained_weights_available()) > 0
assert len(AE.pretrained_weights_available()) > 0
exception_raised = False
try:
vae = vae.from_pretrained("cifar10-resnet18")
# test forward method on pre-trained weights
for x, y in data_loader:
vae(x)
break
vae = vae.from_pretrained(
"stl10-resnet18"
) # try loading weights not compatible with exact architecture
ae = ae.from_pretrained("cifar10-resnet18")
# test forward method on pre-trained weights
with torch.no_grad():
for x, y in data_loader:
ae(x)
break
except Exception:
exception_raised = True
assert exception_raised is False, "error in loading weights"
keyerror = False
try:
vae.from_pretrained("abc")
ae.from_pretrained("xyz")
except KeyError:
keyerror = True
assert keyerror is True, "KeyError not raised when provided with illegal checkpoint name"
