message: training: preprocess: check whether input dataset exists
diff: @@ -79,6 +79,11 @@ def preprocess_dataset(data_name):
  output_dir = get_preproc_data_dir(cfg, data_name)
  print('Preprocessing dataset:', input_dir)
  + # Check whether the dataset exists
  + if not os.path.isdir(input_dir):
  + print('Does not exist')
  + return
  +
  # Create the output directory if it doesn't exist
  if os.path.isdir(output_dir):
  if cfg.clean:
  