text: import os
  import urllib
  
  
  target_dir = "data"
  target_path = os.path.join(target_dir, "cifar-10-python.tar.gz")
  
  if not os.path.exists(target_dir):
      os.makedirs(target_dir)
  
  if not os.path.exists(target_path):
      print "Downloading..."
      urllib.urlretrieve("http://www.cs.toronto.edu/~kriz/cifar-10-python.tar.gz", "data/cifar-10-python.tar.gz")
  
  print "Extracting..."
  os.system("tar xzvf data/cifar-10-python.tar.gz -C data")
  
  print "done."