fix yunjey#187 Typos in language model line 79 and generative_adversarial_network line 25-28

Author: qy-yang

tutorials/02-intermediate/language_model/main.py

@@ -76,7 +76,7 @@ def detach(states):
         loss = criterion(outputs, targets.reshape(-1))
 
         # Backward and optimize
-        model.zero_grad()
+        optimizer.zero_grad()
         loss.backward()
         clip_grad_norm_(model.parameters(), 0.5)
         optimizer.step()

tutorials/03-advanced/generative_adversarial_network/main.py

@@ -22,10 +22,14 @@
     os.makedirs(sample_dir)
 
 # Image processing
+# transform = transforms.Compose([
+#                 transforms.ToTensor(),
+#                 transforms.Normalize(mean=(0.5, 0.5, 0.5),   # 3 for RGB channels
+#                                      std=(0.5, 0.5, 0.5))])
 transform = transforms.Compose([
                 transforms.ToTensor(),
-                transforms.Normalize(mean=(0.5, 0.5, 0.5),   # 3 for RGB channels
-                                     std=(0.5, 0.5, 0.5))])
+                transforms.Normalize(mean=[0.5],   # 1 for greyscale channels
+                                     std=[0.5])])
 
 # MNIST dataset
 mnist = torchvision.datasets.MNIST(root='../../data/',