new_contents: import cPickle
  from data_manipulator import merge_batches
  
  
  def unpickle(batch_file):
      with open(batch_file, 'rb') as file_handler:
          batch = cPickle.load(file_handler)
          return batch
  
  
  def load_batches(batches_number):
      data_batches = [unpickle('data/data_batch_{0}'.format(i + 1)) for i in xrange(batches_number)]
      return data_batches
  
  
  def load_test_batch():
      test_batch = unpickle('data/test_batch')
      return test_batch
  
  
  def load_train_batch():
      train_batches = load_batches(5)
      merged_train_batch = merge_batches(train_batches)
      return merged_train_batch
  
  
  def load_data():
      train_batch = load_train_batch()
      test_batch = load_test_batch()
      return test_batch, train_batch
  
  
  def load_label_names():
      batches_meta = unpickle('data/batches.meta')
      label_names = batches_meta['label_names']
      return label_names
subject: Add data loader