old_contents: from constance import utils
  from constance import settings
  
  
  def load_config_class():
      return utils.import_module_attr(settings.CONFIG_CLASS)
  
  config = load_config_class()()
  
new_contents: from constance import utils
  from constance import settings
  
  
  def load_config_class():
      return utils.import_module_attr(settings.CONFIG_CLASS)
  
  
  config = load_config_class()()
  
subject: fix flake8 style error