Patch 3 (#2389)

* Updates #836 as suggested in pytorch/pytorch#16885 (comment)

Author: TheMemoryDealer

beginner_source/former_torchies/parallelism_tutorial.py

@@ -53,7 +53,10 @@ def forward(self, x):
 
 class MyDataParallel(nn.DataParallel):
     def __getattr__(self, name):
-        return getattr(self.module, name)
+        try:
+            return super().__getattr__(name)
+        except AttributeError:
+            return getattr(self.module, name)
 
 ########################################################################
 # **Primitives on which DataParallel is implemented upon:**