text: import sys, os
  sys.path.append(os.pardir)
  from dataset.mnist import load_mnist
  
  (x_train, t_train), (x_test, t_test) = \
      load_mnist(flatten=True, normalize=False)
  
  print(x_train.shape)
  print(t_train.shape)
  print(x_test.shape)
  print(t_test.shape)
  