code: def export_data_dir(target_path):
      
      from django_productline import utils
      from django.conf import settings
  
      utils.zipdir(settings.PRODUCT_CONTEXT.DATA_DIR, target_path, wrapdir='__data__')
      print('... wrote {target_path}'.format(target_path=target_path))
      return target_path
docs: Exports the media files of the application and bundles a zip archive
      :return: the target path of the zip archive