Update 17_save_load.py

Fix a typo

Author: kevinlin19910227

17_save_load.py

@@ -81,7 +81,7 @@ def forward(self, x):
 torch.save(checkpoint, FILE)
 
 model = Model(n_input_features=6)
-optimizer = optimizer = torch.optim.SGD(model.parameters(), lr=0)
+optimizer = torch.optim.SGD(model.parameters(), lr=0)
 
 checkpoint = torch.load(FILE)
 model.load_state_dict(checkpoint['model_state'])