Change mnist example to use FashionMNIST (#327)

Author: Jeffwan

examples/mnist/mnist.py

@@ -117,14 +117,14 @@ def main():
 
     kwargs = {'num_workers': 1, 'pin_memory': True} if use_cuda else {}
     train_loader = torch.utils.data.DataLoader(
-        datasets.MNIST('../data', train=True, download=True,
+        datasets.FashionMNIST('../data', train=True, download=True,
                        transform=transforms.Compose([
                            transforms.ToTensor(),
                            transforms.Normalize((0.1307,), (0.3081,))
                        ])),
         batch_size=args.batch_size, shuffle=True, **kwargs)
     test_loader = torch.utils.data.DataLoader(
-        datasets.MNIST('../data', train=False, transform=transforms.Compose([
+        datasets.FashionMNIST('../data', train=False, transform=transforms.Compose([
                            transforms.ToTensor(),
                            transforms.Normalize((0.1307,), (0.3081,))
                        ])),