Update parallelism_tutorial.py

added nn.DataParallel

Author: TheMemoryDealer

Diff for: beginner_source/former_torchies/parallelism_tutorial.py

@@ -51,7 +51,7 @@ def forward(self, x):
 # clashes in their names. For those who still want to access the attributes, 
 # a workaround is to use a subclass of ``DataParallel`` as below.
 
-class MyDataParallel(DataParallel):
+class MyDataParallel(nn.DataParallel):
     def __getattr__(self, name):
         try:
             return super().__getattr__(name)