How can I import the MNIST dataset that has been manually downloaded?

Question

I have been experimenting with a Keras example, which needs to import MNIST data

from keras.datasets import mnist
import numpy as np
(x_train, _), (x_test, _) =          


        

Answer 1

Well, the keras.datasets.mnist file is really short. You can manually simulate the same action, that is:

1. Download a dataset from https://s3.amazonaws.com/img-datasets/mnist.pkl.gz

2. .

   import gzip
   f = gzip.open('mnist.pkl.gz', 'rb')
   if sys.version_info < (3,):
       data = cPickle.load(f)
   else:
       data = cPickle.load(f, encoding='bytes')
   f.close()
   (x_train, _), (x_test, _) = data