Update utils.py

utils.py

@@ -63,7 +63,7 @@ def download_checkpoint(
 
 
 def load_checkpoint(checkpoint_path, model, optimizer=None, skip_optimizer=False):
-    #assert os.path.isfile(checkpoint_path)
+    assert os.path.isfile(checkpoint_path)
     checkpoint_dict = torch.load(checkpoint_path, map_location="cpu")
     iteration = checkpoint_dict["iteration"]
     learning_rate = checkpoint_dict["learning_rate"]