I am trying to download MNIST data in PyTorch using the following code:

train_loader = torch.utils.data.DataLoader(datasets.MNIST('data',train=True,download=True,transform=transforms.Compose([transforms.ToTensor(),transforms.Normalize((0.1307,), (0.3081,))])),batch_size=128, shuffle=True)

and it gives the following error.

Downloading http://yann.lecun.com/exdb/mnist/train-images-idx3-ubyte.gz to data/MNIST/raw/train-images-idx3-ubyte.gz
0it [00:00, ?it/s]
---------------------------------------------------------------------------
HTTPError                                 Traceback (most recent call last)
<ipython-input-2-2fee284dabb8> in <module>()5                       transform=transforms.Compose([6                          transforms.ToTensor(),
----> 7                          transforms.Normalize((0.1307,), (0.3081,))8                      ])),9       batch_size=128, shuffle=True)11 frames
/usr/lib/python3.6/urllib/request.py in http_error_default(self, req, fp, code, msg, hdrs)648 class HTTPDefaultErrorHandler(BaseHandler):649     def http_error_default(self, req, fp, code, msg, hdrs):
--> 650         raise HTTPError(req.full_url, code, msg, hdrs, fp)651 652 class HTTPRedirectHandler(BaseHandler):HTTPError: HTTP Error 403: Forbidden

How do I solve this? The notebook was working before, I'm trying to rerun it but I got this error.

This is a new bug, reported here: https://github.com/pytorch/vision/issues/1938

See that thread for some potential workarounds until the issue is fixed in pytorch itself.