update with new syntax

research_seed/mnist/mnist.py

@@ -23,13 +23,13 @@ class CoolSystem(pl.LightningModule):
     def forward(self, x):
         return torch.relu(self.l1(x.view(x.size(0), -1)))
 
-    def training_step(self, batch, batch_nb):
+    def training_step(self, batch, batch_idx):
         # REQUIRED
         x, y = batch
         y_hat = self.forward(x)
         return {'loss': F.cross_entropy(y_hat, y)}
 
-    def validation_step(self, batch, batch_nb):
+    def validation_step(self, batch, batch_idx):
         # OPTIONAL
         x, y = batch
         y_hat = self.forward(x)
@@ -46,7 +46,7 @@ class CoolSystem(pl.LightningModule):
         return torch.optim.Adam(self.parameters(), lr=self.hparams.learning_rate)
 
     @pl.data_loader
-    def tng_dataloader(self):
+    def train_dataloader(self):
         # REQUIRED
         return DataLoader(MNIST(os.getcwd(), train=True, download=True, transform=transforms.ToTensor()), batch_size=self.hparams.batch_size)