code: def plot_stats(digits):
      print("Num images:", digits.images.shape[0])
      print("Image shape:", digits.images.shape[1:])
      print("Labels:", digits.target[:10])
      plt.imshow(tile_images(digits.images[:64, None]), **imshow_opt)
  
imports: from __future__ import print_function
  from nnabla.monitor import tile_images
  from nnabla.utils.data_iterator import data_iterator_simple
  import sys
  import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: plot_stats(digits) without return types