make sure to freeze VAE parameters after being passed into DALL-E

Author: lucidrains

dalle_pytorch/dalle_pytorch.py

@@ -31,6 +31,10 @@ def masked_mean(t, mask, dim = 1):
     t = t.masked_fill(~mask[:, :, None], 0.)
     return t.sum(dim = 1) / mask.sum(dim = 1)[..., None]
 
+def set_requires_grad(model, value):
+    for param in model.parameters():
+        param.requires_grad = value
+
 def eval_decorator(fn):
     def inner(model, *args, **kwargs):
         was_training = model.training
@@ -347,6 +351,7 @@ def __init__(
         self.total_seq_len = seq_len
 
         self.vae = vae
+        set_requires_grad(self.vae, False) # freeze VAE from being trained
 
         self.transformer = Transformer(
             dim = dim,

setup.py

@@ -4,7 +4,7 @@
   name = 'dalle-pytorch',
   packages = find_packages(),
   include_package_data = True,
-  version = '0.11.2',
+  version = '0.11.3',
   license='MIT',
   description = 'DALL-E - Pytorch',
   author = 'Phil Wang',

train_dalle.py

@@ -60,6 +60,8 @@
 def exists(val):
     return val is not None
 
+def get_trainable_params(model):
+    return [params for params in model.parameters() if params.requires_grad]
 
 # constants
 
@@ -229,7 +231,7 @@ def group_weight(model):
 
 # optimizer
 
-opt = Adam(dalle.parameters(), lr=LEARNING_RATE)
+opt = Adam(get_trainable_params(dalle), lr=LEARNING_RATE)
 
 if LR_DECAY:
     scheduler = ReduceLROnPlateau(
@@ -272,7 +274,7 @@ def group_weight(model):
     args=args,
     model=dalle,
     optimizer=opt,
-    model_parameters=dalle.parameters(),
+    model_parameters=get_trainable_params(dalle),
     training_data=ds if using_deepspeed else dl,
     lr_scheduler=scheduler if LR_DECAY else None,
     config_params=deepspeed_config,