code: def cub200_iterator(data_path, batch_k, batch_size, data_shape):
      
      return (CUB200Iter(data_path, batch_k, batch_size, data_shape, is_train=True),
              CUB200Iter(data_path, batch_k, batch_size, data_shape, is_train=False))
docs: Return training and testing iterator for the CUB200-2011 dataset.