code: def create_data_dir():
      
      from django_productline.context import PRODUCT_CONTEXT
      if not os.path.exists(PRODUCT_CONTEXT.DATA_DIR):
          os.mkdir(PRODUCT_CONTEXT.DATA_DIR)
          print('*** Created DATA_DIR in %s' % PRODUCT_CONTEXT.DATA_DIR)
      else:
          print('...DATA_DIR already exists.')
docs: Creates the DATA_DIR.
      :return: